{"id":3823,"date":"2019-06-04T05:42:01","date_gmt":"2019-06-04T05:42:01","guid":{"rendered":"https:\/\/www.meetyoucarbide.com\/?p=3823"},"modified":"2020-05-07T02:09:59","modified_gmt":"2020-05-07T02:09:59","slug":"common-microstructures-of-metal-and-alloy","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/ko\/%ea%b8%88%ec%86%8d-%eb%b0%8f-%ed%95%a9%ea%b8%88%ec%9d%98-%ea%b3%b5%ed%86%b5-%eb%af%b8%ec%84%b8-%ea%b5%ac%ec%a1%b0\/","title":{"rendered":"\uae08\uc18d\uacfc \ud569\uae08\uc758 8 \uac00\uc9c0 \uc77c\ubc18\uc801\uc778 \ubbf8\uc138 \uad6c\uc870"},"content":{"rendered":"
\n

Modern materials can be divided into four categories: metals, polymers, ceramics and composite materials. Despite the rapid development of macromolecule materials, steel is still the most widely used and most important material in the current engineering technology. What factors determine the dominant position of steel materials? Now let’s introduce it in detail.<\/p>\n\n\n\n

\ucca0\uacfc \uac15\ucca0\uc740 \ucca0\uad11\uc11d\uc5d0\uc11c \ucd94\ucd9c\ub418\uba70 \uc790\uc6d0\uc774 \ud48d\ubd80\ud558\uace0 \uac00\uaca9\uc774 \uc800\ub834\ud569\ub2c8\ub2e4. \ucca0-\ud0c4\uc18c \ud569\uae08\uc73c\ub85c\ub3c4 \uc54c\ub824\uc9c4 \ucca0\uacfc \uac15\ucca0\uc740 \ucca0(Fe)\uacfc \ud0c4\uc18c(C), \uaddc\uc18c(Si), \ub9dd\uac04(Mn), \uc778(P), \ud669(S) \ubc0f \uae30\ud0c0 \uc791\uc740 \uc6d0\uc18c\ub85c \uad6c\uc131\ub41c \ud569\uae08\uc785\ub2c8\ub2e4. (Cr, V \ub4f1). \uac15\ucca0\uc758 \ub2e4\uc591\ud55c \uc6d0\uc18c\uc758 \ud568\ub7c9\uacfc \uc5f4\ucc98\ub9ac \uacf5\uc815(4\uc18c\uc131: \ub2f4\uae08\uc9c8, \uc18c\ub454, \ud15c\ud37c\ub9c1, \ub178\uba40\ub77c\uc774\uc9d5)\uc744 \uc870\uc815\ud558\uc5ec \ub2e4\uc591\ud55c \uae08\uc18d \uc870\uc9c1\uc744 \uc5bb\uc744 \uc218 \uc788\uc73c\ubbc0\ub85c \uac15\ucca0\uc774 \uc11c\ub85c \ub2e4\ub978 \ubb3c\uc131\uc744 \uac16\uac8c \ub429\ub2c8\ub2e4. \uae08\uc18d \uc870\uc9c1 \ud604\ubbf8\uacbd\uc73c\ub85c \uad00\ucc30\ub418\ub294 \uad6c\uc870\ub97c \ud2b9\uc815 \ubd80\uc2dd\uc81c\ub85c \uc0d8\ud50c\ub9c1, \uc5f0\ub9c8, \uc5f0\ub9c8 \ubc0f \uc5d0\uce6d\ud55c \ud6c4 \uac15\ucca0\uc758 \uae08\uc18d \uc870\uc9c1\uc774\ub77c\uace0 \ud569\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uad6c\uc870\uc5d0\ub294 \ucca0\uc7ac\uc758 \ube44\ubc00\uc774 \uc228\uaca8\uc838 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

        Fe-Fe3C \uc2dc\uc2a4\ud15c\uc5d0\uc11c\ub294 \ub2e4\ub978 \uc870\uc131\uc758 \ucca0-\ud0c4\uc18c \ud569\uae08\uc744 \uc81c\uc870\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ud3c9\ud615 \uad6c\uc870\ub294 \uc628\ub3c4\uc5d0 \ub530\ub77c \ub2e4\ub974\uc9c0\ub9cc \uba87 \uac00\uc9c0 \uae30\ubcf8 \uc0c1(\ud398\ub77c\uc774\ud2b8 F, \uc624\uc2a4\ud14c\ub098\uc774\ud2b8 A \ubc0f \uc2dc\uba58\ud0c0\uc774\ud2b8 Fe3C)\uc73c\ub85c \uad6c\uc131\ub429\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uae30\ubcf8 \ub2e8\uacc4\ub294 \uae30\uacc4\uc801 \ud63c\ud569\ubb3c\uc758 \ud615\ud0dc\ub85c \uacb0\ud569\ub418\uc5b4 \uac15\ucca0\uc5d0 \ud48d\ubd80\ud558\uace0 \ub2e4\ucc44\ub85c\uc6b4 \uae08\uc18d \uc870\uc9c1\uc744 \ud615\uc131\ud569\ub2c8\ub2e4. 8\uac1c\uc758 \uc77c\ubc18\uc801\uc778 \uae08\uc18d \uad6c\uc870\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

I. \ud398\ub77c\uc774\ud2b8<\/h2>\n\n\n\n

 a-Fe \uaca9\uc790\uc758 \ud2c8\uc0c8\uc5d0 \ud0c4\uc18c\uac00 \uc6a9\ud574\ub418\uc5b4 \ud615\uc131\ub41c \ud2c8\uc0c8 \uace0\uc6a9\uccb4\ub97c \ud398\ub77c\uc774\ud2b8\ub77c\uace0 \ud558\uba70 BCC \uad6c\uc870\uc5d0 \uc18d\ud558\uba70 \ub4f1\ucd95 \ub2e4\uac01\ud615 \uacb0\uc815\ub9bd \ubd84\ud3ec\ub97c \uac00\uc9c0\uba70 \uc774\ub97c \uae30\ud638 F\ub85c \ud45c\uc2dc\ud55c\ub2e4. \uadf8 \uad6c\uc870\uc640 \uc131\uc9c8\uc740 \uc21c\ucca0\uacfc \uc720\uc0ac\ud558\ub2e4. \uac00\uc18c\uc131\uacfc \uc778\uc131\uc774 \uc88b\uc9c0\ub9cc \uac15\ub3c4\uc640 \uacbd\ub3c4\uac00 \ub0ae\uc2b5\ub2c8\ub2e4(30-100HB). \ud569\uae08\uac15\uc5d0\uc11c \uc54c\ud30c-Fe\uc758 \ud0c4\uc18c \ubc0f \ud569\uae08 \uc6d0\uc18c\uc758 \uace0\uc6a9\uccb4\uc785\ub2c8\ub2e4. alpha-Fe\uc5d0\uc11c \ud0c4\uc18c\uc758 \uc6a9\ud574\ub3c4\ub294 \ub9e4\uc6b0 \ub0ae\uc2b5\ub2c8\ub2e4. AC1 \uc628\ub3c4\uc5d0\uc11c \ud0c4\uc18c\uc758 \ucd5c\ub300 \uc6a9\ud574\ub3c4\ub294 0.0218%\uc774\uc9c0\ub9cc \uc628\ub3c4\uac00 \uac10\uc18c\ud568\uc5d0 \ub530\ub77c \uc6a9\ud574\ub3c4\ub294 0.0084%\ub85c \uac10\uc18c\ud569\ub2c8\ub2e4. \ub530\ub77c\uc11c \uc11c\ub0c9 \uc870\uac74\ud558\uc5d0\uc11c \ud398\ub77c\uc774\ud2b8 \uc785\uacc4\uc5d0 \uc138 \ubc88\uc9f8 \uc2dc\uba58\ud0c0\uc774\ud2b8\uac00 \ub098\ud0c0\ub09c\ub2e4. \uac15\ucca0\uc758 \ud0c4\uc18c \ud568\ub7c9\uc774 \uc99d\uac00\ud568\uc5d0 \ub530\ub77c \ud398\ub77c\uc774\ud2b8\uc758 \uc218\ub294 \uac10\uc18c\ud558\uace0 \ud384\ub77c\uc774\ud2b8\uc758 \uc218\ub294 \uc99d\uac00\ud569\ub2c8\ub2e4. \uc774\ub54c \ud398\ub77c\uc774\ud2b8\ub294 \ub9dd\uc0c1\uacfc \ucd08\uc2b9\ub2ec\uc774\ub2e4.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u2161.\uc624\uc2a4\ud14c\ub098\uc774\ud2b8<\/h2>\n\n\n\n

 \u03b3-Fe \uaca9\uc790\uc758 \uaca9\uc790\uac04 \uacf5\uac04\uc5d0\uc11c \ud0c4\uc18c\uac00 \uc6a9\ud574\ub418\uc5b4 \ud615\uc131\ub41c \uaca9\uc790\uac04 \uace0\uc6a9\uccb4\ub97c \uc624\uc2a4\ud14c\ub098\uc774\ud2b8(Austenite)\ub77c\uace0 \ud55c\ub2e4. \uadf8\uac83\uc740 \uba74\uc2ec \uc785\ubc29 \uad6c\uc870\ub97c \uac00\uc9c0\uba70 \uae30\ud638 A\ub85c \ud45c\uc2dc\ub418\ub294 \uace0\uc628 \uc0c1\uc785\ub2c8\ub2e4. Austenite\ub294 1148 C\uc5d0\uc11c \ucd5c\ub300 \uc6a9\ud574\ub3c4\uac00 2.11% C\uc774\uace0 727 C\uc5d0\uc11c \uace0\uc6a9\uccb4\uac00 0.77% C\uc785\ub2c8\ub2e4. \uac15\ub3c4\uc640 \uacbd\ub3c4\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4. \ud398\ub77c\uc774\ud2b8\ubcf4\ub2e4 \ub192\uc73c\uba74 \uac00\uc18c\uc131 \ubc0f \uc778\uc131\uc774 \uc88b\uc73c\uba70 \ube44\uc790\uc131\uc785\ub2c8\ub2e4. \ud2b9\uc815 \uae30\uacc4\uc801 \ud2b9\uc131\uc740 \ud0c4\uc18c \ud568\ub7c9 \ubc0f \uc785\uc790 \ud06c\uae30\uc640 \uad00\ub828\uc774 \uc788\uc73c\uba70 \uc77c\ubc18\uc801\uc73c\ub85c 170-220 HBS, = 40-50%\uc785\ub2c8\ub2e4. TRIP\uac15\uc740 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\uc758 \uc6b0\uc218\ud55c \uac00\uc18c\uc131\uacfc \uc720\uc5f0\uc131\uc744 \ubc14\ud0d5\uc73c\ub85c \uac1c\ubc1c\ub41c \uac15\uc7ac\uc785\ub2c8\ub2e4. \uc794\ub958 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\uc758 \ubcc0\ud615\uc720\ub3c4\ubcc0\ud0dc \ubc0f \ubcc0\ud615\uc720\ub3c4 \uac00\uc18c\uc131\uc740 \uac15\ud310\uc758 \uac00\uc18c\uc131 \ubc0f \uac15\ud310\uc758 \uc131\ud615\uc131\uc744 \ud5a5\uc0c1\uc2dc\ud0a4\uae30 \uc704\ud574 \uc0ac\uc6a9\ub41c\ub2e4. \ud0c4\uc18c \ub610\ub294 \ud569\uae08 \uad6c\uc870\uc6a9 \uac15\ucca0\uc758 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ub294 \ub0c9\uac01 \uc911\uc5d0 \ub2e4\ub978 \uc0c1\uc73c\ub85c \ubcc0\ud569\ub2c8\ub2e4. \uace0\ud0c4\uc18c\uac15 \ubc0f \uce68\ud0c4\uac15\uc758 \uce68\ud0c4 \ubc0f \uace0\uc628 \ub2f4\uae08\uc9c8 \ud6c4\uc5d0\uc57c \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8 \uac04\uadf9\uc5d0 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\uac00 \ub0a8\uc744 \uc218 \uc788\uc73c\uba70 \uce68\uc2dd\ub418\uae30 \uc27d\uc9c0 \uc54a\uae30 \ub54c\ubb38\uc5d0 \uae08\uc18d \uc870\uc9c1 \uad6c\uc870\uac00 \ud770\uc0c9\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u2162. \uc2dc\uba58\ud0c0\uc774\ud2b8<\/h2>\n\n\n\n

 Cementite\ub294 \ud0c4\uc18c\uc640 \ucca0\uc758 \uc77c\uc815 \ube44\uc728\uc5d0 \uc758\ud574 \ud569\uc131\ub418\ub294 \uae08\uc18d \ud654\ud569\ubb3c\uc785\ub2c8\ub2e4. \ubd84\uc790\uc2dd Fe3C\ub294 \ud0c4\uc18c \ud568\ub7c9\uc774 6.69%\uc774\uace0 (Fe, M) 3C\uac00 \ud569\uae08\uc5d0 \ud615\uc131\ub428\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4. Cementite\ub294 \ub2e8\ub2e8\ud558\uace0 \ubd80\uc11c\uc9c0\uae30 \uc27d\uace0 \uac00\uc18c\uc131\uacfc \ucda9\uaca9 \uc778\uc131\uc740 \uac70\uc758 0\uc774\uba70 \ucde8\uc131\uc740 \ub9e4\uc6b0 \ub192\uc73c\uba70 \uacbd\ub3c4\ub294 800HB\uc785\ub2c8\ub2e4. \ucca0\uac15\uc5d0\uc11c \ubd84\ud3ec\ub294 \uc77c\ubc18\uc801\uc73c\ub85c \ub124\ud2b8\uc6cc\ud06c, \ubc18 \ub124\ud2b8\uc6cc\ud06c, \ud50c\ub808\uc774\ud06c, \ubc14\ub298 \ud50c\ub808\uc774\ud06c \ubc0f \uc785\uc0c1\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

 IV. \ud384\ub77c\uc774\ud2b8<\/h2>\n\n\n\n

 \ud384\ub77c\uc774\ud2b8\ub294 \ud398\ub77c\uc774\ud2b8\uc640 \uc2dc\uba58\ud0c0\uc774\ud2b8\uc758 \uae30\uacc4\uc801 \ud63c\ud569\ubb3c\ub85c \uae30\ud638 P\ub85c \ud45c\uc2dc\ub429\ub2c8\ub2e4. \uae30\uacc4\uc801 \ud2b9\uc131\uc740 \ud398\ub77c\uc774\ud2b8\uc640 \uc2dc\uba58\ud0c0\uc774\ud2b8 \uc0ac\uc774\uc5d0 \uc788\uc73c\uba70 \uace0\uac15\ub3c4, \uc911\uac04 \uacbd\ub3c4 \ubc0f \ud2b9\uc815 \uac00\uc18c\uc131\uc744 \uac00\uc9c0\uace0 \uc788\uc2b5\ub2c8\ub2e4. \ud384\ub77c\uc774\ud2b8\ub294 \uac15\ucca0\uc5d0\uc11c \uacf5\uc11d \ubcc0\ud615\uc758 \uc0b0\ubb3c\uc785\ub2c8\ub2e4. \uadf8 \ud615\ud0dc\ub294 \ud398\ub77c\uc774\ud2b8\uc640 \uc2dc\uba58\ud0c0\uc774\ud2b8\uac00 \uc9c0\ubb38\uacfc \uac19\uc740 \uce35\uc73c\ub85c \ubc30\uc5f4\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \ud0c4\ud654\ubb3c\uc758 \ubd84\ud3ec \ud328\ud134\uc5d0 \ub530\ub77c \ud50c\ub808\uc774\ud06c \ud384\ub77c\uc774\ud2b8\uc640 \uad6c\ud615 \ud384\ub77c\uc774\ud2b8\uc758 \ub450 \uac00\uc9c0 \uc720\ud615\uc73c\ub85c \ub098\ub20c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

 \u314f. \ud50c\ub808\uc774\ud06c \ud384\ub77c\uc774\ud2b8: \ub450\uaebc\uc6b4 \ud50c\ub808\uc774\ud06c, \uc911\uac04 \ud50c\ub808\uc774\ud06c \ubc0f \ubbf8\uc138 \ud50c\ub808\uc774\ud06c\uc758 \uc138 \uac00\uc9c0 \uc720\ud615\uc73c\ub85c \ub098\ub20c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\ube44. \uad6c\ud615 \ud384\ub77c\uc774\ud2b8: \uad6c\uc0c1\ud654 \uc5b4\ub2d0\ub9c1\uc73c\ub85c \uc5bb\uc740 \uc2dc\uba58\ud0c0\uc774\ud2b8\uac00 \uad6c\uc0c1\ud654\ub418\uc5b4 \ud398\ub77c\uc774\ud2b8 \uae30\uc9c0\uc5d0 \ubd84\ud3ec\ub429\ub2c8\ub2e4. \uc2dc\uba58\ud0c0\uc774\ud2b8 \ud68c\uc804 \ud0c0\uc6d0\uccb4\uc758 \ud06c\uae30\ub294 \uad6c\uc0c1\ud654 \uc5b4\ub2d0\ub9c1 \uacf5\uc815, \ud2b9\ud788 \ub0c9\uac01 \uc18d\ub3c4\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9d1\ub2c8\ub2e4. \uad6c\ud615 \ud384\ub77c\uc774\ud2b8\ub294 \uc870\ub300 \uad6c\ud615, \uad6c\ud615, \ubbf8\uc138 \uad6c\ud615 \ubc0f \uc810\uc0c1\uc758 4\uac00\uc9c0 \uc720\ud615\uc73c\ub85c \ub098\ub20c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

V. \ubca0\uc774\ub098\uc774\ud2b8<\/h2>\n\n\n\n

\ubca0\uc774\ub098\uc774\ud2b8\ub294 \uc911\uc628\ub300\uc5d0\uc11c \ud384\ub77c\uc774\ud2b8 \ubcc0\ud0dc\ub300 \uc774\ud558, MS\uc810 \uc774\uc0c1\uc5d0\uc11c \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\uac00 \ubcc0\ud0dc\ud55c \uc0b0\ubb3c\uc774\ub2e4. \ubca0\uc774\ub098\uc774\ud2b8\ub294 \ud398\ub77c\uc774\ud2b8\uc640 \uc2dc\uba58\ud0c0\uc774\ud2b8\uc758 \uae30\uacc4\uc801 \ud63c\ud569\ubb3c\ub85c\uc11c \ud384\ub77c\uc774\ud2b8\uc640 \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8 \uc0ac\uc774\uc758 \uad6c\uc870\ub85c \uae30\ud638 B\ub85c \ud45c\uc2dc\ub429\ub2c8\ub2e4. \ud615\uc131 \uc628\ub3c4\uc5d0 \ub530\ub77c \uc785\uc0c1 \ubca0\uc774\ub098\uc774\ud2b8, \uc0c1\ubd80 \ubca0\uc774\ub098\uc774\ud2b8(\uc0c1\ubd80 B), \ud558\ubd80 \ubca0\uc774\ub098\uc774\ud2b8(\ud558\ubd80 B)\ub85c \ub098\ub20c \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc785\uc0c1 \ubca0\uc774\ub098\uc774\ud2b8\ub294 \uac15\ub3c4\ub294 \ub0ae\uc9c0\ub9cc \uc778\uc131\uc774 \uc88b\uc2b5\ub2c8\ub2e4. \ub0ae\uc740 \ubca0\uc774\ub098\uc774\ud2b8\ub294 \uac15\ub3c4\uac00 \ub192\uace0 \uc778\uc131\uc774 \uc88b\uc2b5\ub2c8\ub2e4. \uc785\uc0c1 \ubca0\uc774\ub098\uc774\ud2b8\ub294 \uc778\uc131\uc774 \uac00\uc7a5 \ub098\uc058\ub2e4. \ubca0\uc774\ub098\uc774\ud2b8 \ud615\ud0dc\ub294 \ubcc0\uacbd \uac00\ub2a5\ud569\ub2c8\ub2e4. \ubca0\uc774\ub098\uc774\ud2b8\ub294 \ubaa8\uc591 \ud2b9\uc131\uc5d0 \ub530\ub77c \uae43\ud138, \ubc14\ub298 \ubc0f \uc785\uc0c1\uc758 \uc138 \uac00\uc9c0 \uc720\ud615\uc73c\ub85c \ub098\ub20c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u314f. \uc0c1\ubd80 \ubca0\uc774\ub098\uc774\ud2b8: <\/h3>\n\n\n\n

\uc0c1\ubd80 \ubca0\uc774\ub098\uc774\ud2b8\ub294 \ud398\ub77c\uc774\ud2b8 \ubc14\ub298 \ucd95\uc5d0 \ud3c9\ud589\ud55c \uac00\ub294 \uc2a4\ud2b8\ub9bd(\ub610\ub294 \uc9e7\uc740 \ub9c9\ub300) \uc2dc\uba58\ud0c0\uc774\ud2b8\uc640 \uae43\ud138 \uac19\uc740 \uc2a4\ud2b8\ub9bd \ud398\ub77c\uc774\ud2b8\uc758 \ud3c9\ud589 \ubc30\uc5f4\uc774 \ud2b9\uc9d5\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\ube44. \ud558\ubd80 \ubca0\uc774\ub098\uc774\ud2b8: <\/h3>\n\n\n\n

\ubbf8\uc138 \ubc14\ub298 \ud50c\ub808\uc774\ud06c, \ud2b9\uc815 \ubc29\ud5a5, \ub2f4\uae08\uc9c8 \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\ubcf4\ub2e4 \uce68\uc2dd\uc5d0 \ub354 \ucde8\uc57d, \ud15c\ud37c\ub4dc \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\uc640 \ub9e4\uc6b0 \uc720\uc0ac, \uad11\ud559 \ud604\ubbf8\uacbd\uc73c\ub85c \uad6c\ubcc4\ud558\uae30\uac00 \ub9e4\uc6b0 \uc5b4\ub835\uace0 \uc804\uc790 \ud604\ubbf8\uacbd\uc73c\ub85c \uad6c\ubcc4\ud558\uae30 \uc27d\uc2b5\ub2c8\ub2e4. \ud0c4\ud654\ubb3c\uc740 \uce68\uc0c1 \ud398\ub77c\uc774\ud2b8\uc5d0\uc11c \uc11d\ucd9c\ub418\uba70 \uadf8 \uc815\ub82c \ubc29\ud5a5\uc740 \ud398\ub77c\uc774\ud2b8 \uc2dc\ud2b8\uc758 \uc7a5\ucd95\uacfc 55-60\ub3c4\uc774\uace0 \ud558\ubd80 \ubca0\uc774\ub098\uc774\ud2b8\ub294 \uc30d\uc815\uc744 \ud3ec\ud568\ud558\uc9c0 \uc54a\uc73c\uba70 \ub354 \ub9ce\uc740 \uc804\uc704\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\uc528. \uc785\uc0c1 \ubca0\uc774\ub098\uc774\ud2b8: <\/h3>\n\n\n\n

\ub2e4\uac01\ud615 \ubaa8\uc591\uacfc \ub9ce\uc740 \ubd88\uaddc\uce59\ud55c \uc12c \ubaa8\uc591\uc758 \uad6c\uc870\ub97c \uac00\uc9c4 \ud398\ub77c\uc774\ud2b8. \uac15\uc758 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ub97c \uc0c1\ubd80 \ubca0\uc774\ub098\uc774\ud2b8\uc758 \uc131\ud615\uc628\ub3c4\ubcf4\ub2e4 \uc57d\uac04 \ub192\uac8c \ub0c9\uac01\ud558\uba74 \uc11d\ucd9c\ub41c \ud398\ub77c\uc774\ud2b8\uc758 \uc77c\ubd80 \ud0c4\uc18c \uc6d0\uc790\uac00 \ud398\ub77c\uc774\ud2b8\/\uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \uc0c1\uacbd\uacc4\ub97c \ud1b5\ud574 \ud398\ub77c\uc774\ud2b8\uc5d0\uc11c \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ub85c \uc774\ub3d9\ud558\uc5ec \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\uc5d0 \ud0c4\uc18c\uac00 \ubd88\uade0\uc77c\ud558\uac8c \ud48d\ubd80\ud558\uac8c \ub418\uc5b4 \ubcc0\ud0dc\ub97c \uc5b5\uc81c\ud55c\ub2e4. \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\uc5d0\uc11c \ud398\ub77c\uc774\ud2b8\ub85c. \uc774\ub7ec\ud55c \uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \uc601\uc5ed\uc740 \uc77c\ubc18\uc801\uc73c\ub85c \ud398\ub77c\uc774\ud2b8 \ub9e4\ud2b8\ub9ad\uc2a4\uc5d0 \ubd84\ud3ec\ub41c \uc12c\ud615, \uacfc\ub9bd\ud615 \ub610\ub294 \uc2a4\ud2b8\ub9bd\ud615\uc785\ub2c8\ub2e4. \uc5f0\uc18d \ub0c9\uac01 \uc911\uc5d0 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\uc758 \uc870\uc131\uacfc \ub0c9\uac01 \uc870\uac74\uc5d0 \ub530\ub77c \uadf8\ub808\uc778 \ubca0\uc77c\uc758 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ub294 \ub2e4\uc74c\uacfc \uac19\uc740 \ubcc0\ud654\ub97c \uacaa\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

(i) \uc804\uccb4 \ub610\ub294 \ubd80\ubd84\uc801\uc73c\ub85c \ud398\ub77c\uc774\ud2b8\uc640 \ud0c4\ud654\ubb3c\ub85c \ubd84\ud574. \uc804\uc790\ud604\ubbf8\uacbd\uc73c\ub85c \ubd84\uc0b0\ub41c \ub2e4\ubc29\ud5a5 \ubd84\ud3ec\ub97c \uac16\ub294 \uc785\uc0c1, \ub9c9\ub300 \ub610\ub294 \uc791\uc740 \ube14\ub85d \ud0c4\ud654\ubb3c\uc744 \ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

(ii) \uad11\ud559\ud604\ubbf8\uacbd\ud558\uc5d0\uc11c \uc644\uc804\ud788 \ud669\uc0c9\uc778 \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\ub85c\uc758 \ubd80\ubd84\uc801 \ubcc0\ud615.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

(iii) \uc5ec\uc804\ud788 \ud0c4\uc18c\uac00 \ud48d\ubd80\ud55c \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ub97c \uc720\uc9c0\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc785\uc0c1 \ud0c4\ud654\ubb3c\uc740 \uc785\uc0c1 \ubca0\uc774\ub098\uc774\ud2b8\uc758 \ud398\ub77c\uc774\ud2b8 \ub9e4\ud2b8\ub9ad\uc2a4\uc5d0 \ubd84\ud3ec\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4(\uc12c \uad6c\uc870\ub294 \uc6d0\ub798 \ud0c4\uc18c\uac00 \ud48d\ubd80\ud55c \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\uc600\uc73c\uba70 \ub0c9\uac01\ub418\uba74 \ud398\ub77c\uc774\ud2b8\uc640 \ud0c4\ud654\ubb3c\ub85c \ubd84\ud574\ub418\uac70\ub098 \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\ub85c \ubcc0\ud615\ub418\uac70\ub098 \ud0c4\uc18c\uac00 \ud48d\ubd80\ud55c \uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \uc785\uc790\ub85c \ub0a8\uc544 \uc788\uc74c). Feather bainite, ferrite matrix, strip carbide\uac00 ferrite sheet\uc758 \uac00\uc7a5\uc790\ub9ac\uc5d0 \uc11d\ucd9c\ub428. \ud558\ubd80 \ubca0\uc774\ub098\uc774\ud2b8, \uce68\uc0c1 \ud398\ub77c\uc774\ud2b8\ub294 \uc791\uc740 \ud50c\ub808\uc774\ud06c \uce74\ubc14\uc774\ub4dc, \ud50c\ub808\uc774\ud06c \uce74\ubc14\uc774\ub4dc\ub294 \ud398\ub77c\uc774\ud2b8\uc758 \uc7a5\ucd95\uc774 \ub300\ub7b5 55~60\ub3c4 \uac01\ub3c4\uc785\ub2c8\ub2e4. <\/p>\n\n\n\n

VI. WEISHER’S TISSUE<\/h2>\n\n\n\n

Widmanstatten \uad6c\uc870\ub294 \uc77c\uc885\uc758 \uacfc\uc5f4 \uad6c\uc870\ub85c \ud398\ub77c\uc774\ud2b8 \ubc14\ub298\uc774 \uc11c\ub85c \uc57d 60\ub3c4 \uad50\ucc28\ud558\uace0 \uac15\ucca0 \ub9e4\ud2b8\ub9ad\uc2a4\uc5d0 \ub0b4\uc7a5\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \uac70\uce5c Widmanstatten \uad6c\uc870\ub294 \uac15\ucca0\uc758 \uac00\uc18c\uc131\uacfc \uc778\uc131\uc744 \uac10\uc18c\uc2dc\ud0a4\uace0 \ucde8\uc131\uc744 \uc99d\uac00\uc2dc\ud0b5\ub2c8\ub2e4. \ucc28\uacf5\uc11d\uac15\uc740 \uacfc\uc5f4\uc5d0 \uc758\ud574 \uc870\ub300\ud55c \uc785\uc790\uac00 \ud615\uc131\ub418\uace0 \ub0c9\uac01\ub418\uba74 \ube60\ub974\uac8c \uc11d\ucd9c\ub41c\ub2e4. \ub530\ub77c\uc11c \uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \uacb0\uc815\ub9bd\uacc4\ub97c \ub530\ub978 \ub9dd\uc0c1\uc11d\ucd9c \uc678\uc5d0 \uc804\ub2e8\uae30\uc804\uc5d0 \uc758\ud574 \uc77c\ubd80 \ud398\ub77c\uc774\ud2b8\uac00 \uacb0\uc815\ub9bd\uacc4\uc5d0\uc11c \uacb0\uc815\ub9bd\uacc4\ub85c \ud615\uc131\ub418\uc5b4 \uce68\uc0c1\uc73c\ub85c \ubcc4\ub3c4\ub85c \uc11d\ucd9c\ub41c\ub2e4. \uc774 \ubd84\ud3ec\uc758 \uad6c\uc870\ub97c Widmanstatten \uad6c\uc870\ub77c\uace0 \ud569\ub2c8\ub2e4. \uacfc\uc5f4\ub41c \ucd08\uacf5\uc11d\uac15\uc774 \ub0c9\uac01\ub418\uba74 \uc2dc\uba58\ud0c0\uc774\ud2b8\ub3c4 \uacb0\uc815\ub9bd\uacc4\uc5d0\uc11c \uacb0\uc815\ub9bd\uc73c\ub85c \ud655\uc7a5\ub418\uc5b4 Widmanstatten \uad6c\uc870\ub97c \ud615\uc131\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u2166.\ub9c8\ub974\ud150\uc0ac\uc774\ud2b8<\/h2>\n\n\n\n
\"\"<\/figure>\n\n\n\n

\uc54c\ud30c-\ucca0\uc5d0 \ud0c4\uc18c\uc758 \uacfc\ud3ec\ud654 \uace0\uc6a9\uccb4\ub97c \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\ub77c\uace0 \ud569\ub2c8\ub2e4. \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\ub294 \uac15\ub3c4\uc640 \uacbd\ub3c4\uac00 \ub192\uc9c0\ub9cc \uac00\uc18c\uc131\uc740 \uac70\uc758 0\uc5d0 \uac00\uae5d\uc2b5\ub2c8\ub2e4. \uae30\ud638 M\uc73c\ub85c \ud45c\uc2dc\ub418\ub294 \ucda9\uaca9 \ud558\uc911\uc744 \uacac\ub51c \uc218 \uc5c6\uc2b5\ub2c8\ub2e4. \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\ub294 \uacfc\ub0c9\uac01\ub41c \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\uc758 \uae09\uc18d \ub0c9\uac01\uacfc MS\uc640 Mf \uc810 \uc0ac\uc774\uc758 \uc804\ub2e8 \ubaa8\ub4dc \ubcc0\ud658\uc758 \uc0b0\ubb3c\uc785\ub2c8\ub2e4. \uc774\ub54c \ud0c4\uc18c(\ubc0f \ud569\uae08\uc6d0\uc18c)\ub294 \uc2dc\uac04\uc774 \uc9c0\ub0a8\uc5d0 \ub530\ub77c \ud655\uc0b0\ub418\uc9c0 \uc54a\uace0 \uac10\ub9c8-\ucca0\uc758 \uaca9\uc790(\uba74\uc911\uc2ec)\uc5d0\uc11c \uc54c\ud30c-\ucca0\uc758 \uaca9\uc790(\ubab8\uc758 \uc911\uc2ec), \uc989 \uace0\uc6a9\uccb4(\uc624\uc2a4\ud14c\ub098\uc774\ud2b8)\ub85c\ub9cc \ud655\uc0b0\ub41c\ub2e4. \uac10\ub9c8-\ucca0\uc758 \ud0c4\uc18c\ub97c \uc54c\ud30c-\ucca0\uc758 \ud0c4\uc18c \uace0\uc6a9\uccb4\ub85c. \ub530\ub77c\uc11c \ub9c8\ud150\uc790\uc774\ud2b8 \ubcc0\ud0dc\ub294 \ub9c8\ud150\uc790\uc774\ud2b8\uc758 \uae08\uc18d\ud559\uc801 \ud2b9\uc131\uc744 \uae30\ubc18\uc73c\ub85c \ud558\uba70, \uc774\ub294 \ub77c\uc2a4 \ub9c8\ud150\uc790\uc774\ud2b8(\uc800\ud0c4\uc18c)\uc640 \uce68\uc0c1 \ub9c8\ud150\uc790\uc774\ud2b8\ub85c \ub098\ub20c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u314f. \ub77c\uc2a4 \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8: <\/h3>\n\n\n\n

\uc800\ud0c4\uc18c \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\ub77c\uace0\ub3c4 \ud569\ub2c8\ub2e4. \ub300\ub7b5 \uac19\uc740 \ud06c\uae30\uc758 \ubbf8\uc138\ud55c \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8 \uc2a4\ud2b8\ub9bd\uc774 \ud3c9\ud589\ud558\uac8c \uc815\ub82c\ub418\uc5b4 \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8 \ubc88\ub4e4 \ub610\ub294 \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8 \ub3c4\uba54\uc778\uc744 \ud615\uc131\ud569\ub2c8\ub2e4. \ub3c4\uba54\uc778\uacfc \ub3c4\uba54\uc778 \uc0ac\uc774\uc758 \ubc30\ud5a5 \ucc28\uc774\uac00 \ud06c\uba70, \uae30\ubcf8 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \uacb0\uc815\ub9bd\uc5d0 \uc11c\ub85c \ub2e4\ub978 \ubc30\ud5a5\uc744 \uac16\ub294 \uc5ec\ub7ec \ub3c4\uba54\uc778\uc774 \ud615\uc131\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub77c\uc2a4 \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8 \ud615\uc131 \uc628\ub3c4\uac00 \ub192\uae30 \ub54c\ubb38\uc5d0 \ub0c9\uac01 \uacfc\uc815\uc5d0\uc11c \ubd88\uac00\ud53c\ud558\uac8c \uc790\uae30 \ud15c\ud37c\ub9c1 \ud604\uc0c1\uc774 \ubc1c\uc0dd\ud558\uace0 \ud615\uc131\ub41c \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\uc5d0 \ud0c4\ud654\ubb3c\uc774 \uc11d\ucd9c\ub418\uc5b4 \uce68\uc2dd \ubc0f \uc554\uc0c9\uc5d0 \ucde8\uc57d\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

 \ube44. \uce68\uc0c1 \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8:<\/h3>\n\n\n\n

\ud50c\ub808\uc774\ud06c \ub9c8\ud150\uc790\uc774\ud2b8 \ub610\ub294 \uace0\ud0c4\uc18c \ub9c8\ud150\uc790\uc774\ud2b8\ub77c\uace0\ub3c4 \ud558\uba70 \uae30\ubcf8 \ud2b9\uc131\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4. \uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \uacb0\uc815\ub9bd\uc73c\ub85c \ud615\uc131\ub41c \uccab \ubc88\uc9f8 \ub9c8\ud150\uc790\uc774\ud2b8 \uc2dc\ud2b8\ub294 \ube44\uad50\uc801 \ud06c\uba70, \uc885\uc885 \uc804\uccb4 \uacb0\uc815\ub9bd \uc804\uccb4\uc5d0 \uac78\uccd0 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \uacb0\uc815\ub9bd\uc774 \ubd84\ud560\ub418\ubbc0\ub85c \ub098\uc911\uc5d0 \ud615\uc131\ub418\ub294 \ub9c8\ud150\uc790\uc774\ud2b8\uc758 \ud06c\uae30\uac00 \uc81c\ud55c\ub429\ub2c8\ub2e4. , \ub530\ub77c\uc11c \ud50c\ub808\uc774\ud06c \ub9c8\ud150\uc790\uc774\ud2b8\uc758 \ud06c\uae30\uac00 \ub2e4\uc591\ud558\uace0 \ubd88\uaddc\uce59\ud558\uac8c \ubd84\ud3ec\ud569\ub2c8\ub2e4. \uce68\uc0c1 \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\ub294 \uc77c\uc815\ud55c \ubc29\ud5a5\uc73c\ub85c \ud615\uc131\ub41c\ub2e4. \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8 \ubc14\ub298\uc5d0 \uc911\uac04 \ub2a5\uc120\uc774 \uc788\uc2b5\ub2c8\ub2e4. \ud0c4\uc18c \ud568\ub7c9\uc774 \ub192\uc744\uc218\ub85d \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\uac00 \ub354 \ubd84\uba85\ud569\ub2c8\ub2e4. \ub3d9\uc2dc\uc5d0, \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8 \uc0ac\uc774\uc5d0\ub294 \ubc31\uc0c9 \uc794\ub958 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\uac00 \uc788\ub2e4.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

 \uc528. \ub2f4\uae08\uc9c8 \ud6c4\uc5d0 \ud615\uc131\ub41c \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\ub294 \ub610\ud55c \ud15c\ud37c\ub9c1 \ud6c4\uc5d0 \uc138 \uac00\uc9c0 \ud2b9\uc218 \uae08\uc18d \uc870\uc9c1\uc744 \ud615\uc131\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/h3>\n\n\n\n

(i) \uac15\ud654 \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8: <\/h4>\n\n\n\n

the composite of sheet martensite formed during quenching (with a crystal structure of tetragonal body center) which is decomposed in the first stage of tempering, in which carbon is desolved in the form of transition carbides, and extremely fine transition carbide sheets dispersed in the solid solution matrix (whose crystal structure has changed into body-centered cube) (the interface with the matrix is a coherent interface) Phase structure. this kind of structure can not distinguish its internal structure even when magnified to the maximum magnification under metallographic (optical) microscope, only can see that its whole structure is black needle (the shape of black needle is basically the same as that of white needle formed during quenching). This kind of black needle is called “tempered martensite”.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

(ii) \uac15\ud654\ub41c troostite: <\/h4>\n\n\n\n

\ub2f4\uae08\uc9c8\ub41c \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\uc758 \uc81c\ud488\uc740 \uc911\uac04 \uc628\ub3c4\uc5d0\uc11c \ud15c\ud37c\ub9c1\ub41c \uc81c\ud488\uc73c\ub85c \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\uc758 \uce68 \ubaa8\uc591\uc774 \uc810\ucc28 \uc0ac\ub77c\uc9c0\ub294 \ud2b9\uc9d5\uc774 \uc788\uc9c0\ub9cc \uc5ec\uc804\ud788 \ubaa8\ud638\ud558\uac8c \ubcf4\uc785\ub2c8\ub2e4(\ud06c\ub86c \ud568\uc720 \ud569\uae08\uac15, \ud569\uae08 \ud398\ub77c\uc774\ud2b8 \uc7ac\uacb0\uc815 \uc628\ub3c4\uac00 \ub354 \ub192\uae30 \ub54c\ubb38\uc5d0 \uc5ec\uc804\ud788 \uce68 \ubaa8\uc591\uc744 \uc720\uc9c0\ud568), \uce68\uac15 \ud0c4\ud654\ubb3c\uc740 \uc791\uc2b5\ub2c8\ub2e4. , \uad11\ud559\ud604\ubbf8\uacbd\uc73c\ub85c \uad6c\ubcc4\ud558\uae30 \uc5b4\ub824\uc6b4 \ud0c4\ud654\ubb3c \uc785\uc790\ub294 \uc804\uc790\ud604\ubbf8\uacbd\uc73c\ub85c\ub9cc \ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uadf9 \uc870\uc9c1\uc758 \uce68\uc2dd \ubc0f \ud751\ud654\uc5d0 \ucde8\uc57d\ud569\ub2c8\ub2e4. \ud15c\ud37c\ub9c1 \uc628\ub3c4\uac00 \ub354 \ub192\uac70\ub098 \ub354 \uc624\ub798 \uc720\uc9c0\ub418\uba74 \ubc14\ub298\uc774 \ud770\uc0c9\uc774 \ub429\ub2c8\ub2e4. \uc774\ub54c \ud0c4\ud654\ubb3c\uc740 \ubc14\ub298\uc758 \uac00\uc7a5\uc790\ub9ac\uc5d0 \uc9d1\uc911\ub418\uc5b4 \uac15\ucca0\uc758 \uacbd\ub3c4\uac00 \uc57d\uac04 \ub0ae\uc544\uc9c0\uace0 \uac15\ub3c4\uac00 \uac10\uc18c\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

(iii) \uac15\ud654\ub41c \uc18c\ub974\ubc14\uc774\ud2b8: <\/h4>\n\n\n\n

\uace0\uc628\uc5d0\uc11c \ud15c\ud37c\ub9c1\ub41c \ub2f4\uae08\uc9c8\ub41c \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8 \uc81c\ud488. \uadf8 \ud2b9\uc131\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4. \ubbf8\uc138\ud55c \uc785\uc0c1 \ud0c4\ud654\ubb3c\uc740 \uc18c\ub974\ubc14\uc774\ud2b8 \ub9e4\ud2b8\ub9ad\uc2a4\uc5d0 \ubd84\ud3ec\ub418\uc5b4 \uc788\uc73c\uba70 \uad11\ud559 \ud604\ubbf8\uacbd\uc73c\ub85c \uba85\ud655\ud558\uac8c \uad6c\ubcc4\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ucee8\ub514\uc154\ub2dd\ub41c \uad6c\uc870\ub77c\uace0\ub3c4 \ud558\ub294 \uc774\ub7ec\ud55c \uc885\ub958\uc758 \uad6c\uc870\ub294 \uac15\ub3c4\uc640 \uc778\uc131\uc774 \uc798 \uc870\ud569\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \ud398\ub77c\uc774\ud2b8\uc758 \ubbf8\uc138 \ud0c4\ud654\ubb3c\uc774 \ubbf8\uc138\ud560\uc218\ub85d \uacbd\ub3c4\uc640 \uac15\ub3c4\uac00 \ub192\uc544\uc9c0\uace0 \uc778\uc131\uc774 \ub098\ube60\uc9d1\ub2c8\ub2e4. \ubc18\ub300\ub85c \uacbd\ub3c4\uc640 \uac15\ub3c4\uac00 \ub0ae\uace0 \uc778\uc131\uc774 \ub192\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\u2167.\ub808\ub4dc\ubd80\ub77c\uc774\ud2b8<\/h2>\n\n\n\n
\"\"<\/figure>\n\n\n\n

The eutectic mixtures in FERROCARBON alloys, i.e. liquid FERROCARBON alloys with a mass fraction of carbon (carbon content) of 4.3%, are called ledeburite when the mechanical mixtures of austenite and cementite crystallize simultaneously from the liquid at 1480 degrees Celsius. Since austenite transforms into pearlite at 727 C, ledeburite is composed of pearlite and cementite at room temperature. In order to distinguish the ledeburite above 727 C is called high-temperature ledeburite (L d), and the ledeburite below 727 C is called low-temperature ledeburite (L’d). The properties of ledeburite are similar to those of cementite with high hardness and poor plasticity.<\/p>\n\n\n\n

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Modern materials can be divided into four categories: metals, polymers, ceramics and composite materials. Despite the rapid development of macromolecule materials, steel is still the most widely used and most important material in the current engineering technology. What factors determine the dominant position of steel materials? Now let’s introduce it in detail. Iron and steel…<\/p>","protected":false},"author":2,"featured_media":19470,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[79],"tags":[],"jetpack_featured_media_url":"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/06\/1-6.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/posts\/3823"}],"collection":[{"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/comments?post=3823"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/posts\/3823\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/media\/19470"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/media?parent=3823"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/categories?post=3823"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/tags?post=3823"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}