Effects of Small Amount of Carbon Addition on the Transformation Texture in Extra-low Carbon Steel Sheets

少量增碳对超低碳钢板相变织构的影响

• 批准号: 11650750
• 负责人: SUDO Masatoshi
• 金额: $ 0.32万
• 依托单位: Kanazawa Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650750/
• 关键词: phase transformation; texture; extra-low carbon steel sheet; addition of ppm carbon; manganese content; 極低炭素鋼; 変態集合組織; (111)結晶方位; (111)変態集合組織; ベイナイト的組織; フェライト+マルテンサイト複合組織

The samples mainly used are 1%Mn-0.035%Ti extra-low carbon steel cold-rolled sheets, which contain no Nb. The sheets are recrystallized and then carburized up to 189ppm, in order to examine the effects of carbon content and heating temperature on the transformation behavior and transformation texture.(1) The transformation structure formed by quenching from γ region into iced water gives 150HV for 16ppm carbon and 180HV for 49ppmC.Moreover, the transformation structure was the quasi-polygonal ferrite and/or intermediate transformation phase having high dislocation density, and the (111) orientation (texture) developed.(2) The formation of the lath martensite in the steel containing 189ppm carbon promoted the development of (100) and/or (110) orientation and the decrease of (111) orientation.(3) The subboundary of intermediate transformation phase is composed of mainly incoherent interface.(4) The increase in manganese content and solute carbon content accelerate transformation as expected.The relationship between the development of (111 ) transformation texture and the mature of interface is very stimulating and must be examined to clarify the mechanism of development of (111) texture with respect to transformation mechanism reconstructive or displacive.These results also suggest the possibility of developing new type of steel sheet having an excellent combination of high strength and good deep-drawability.

主要使用的样品为1%Mn-0.035%Ti超低碳钢冷轧板，不含Nb。对板材进行再结晶，然后渗碳至189ppm，以研究碳含量和加热温度对相变行为和相变织构的影响。（1）从γ区淬火到冰水中形成的相变组织，16ppm碳时为150HV，49ppmC时为180HV。此外，转变组织是准多边形铁素体和/或中间相变组织 (2)含碳量为189ppm的钢中板条马氏体的形成促进了(100)和/或(110)取向的发展和(111)取向的减少。(3)中间相变相的亚界主要由非共格界面组成。(4)锰含量的增加和 溶质碳含量如预期加速相变。(111)相变织构的发展与界面成熟之间的关系是非常刺激的，必须研究以澄清(111)相变织构的发展机制相对于重构或位移的相变机制。这些结果也表明开发具有高强度和良好深拉性能的新型钢板的可能性。

项目成果

須藤正俊: "1%Mn-0,034%Ti添加極低炭素鋼板の変態集合組織に及ぼす微量炭素添加量の影響"鉄と鋼(日本鉄鋼協会).

Masatoshi Sudo：“微量碳添加量对1%Mn-0,034%Ti添加超低碳钢板转变织构的影响”《钢铁》（日本钢铁研究所）。

Masatoshi Sudo, Shinji Wakikawa, Masahiro Okuno, and Ichiro Tsukatani: "Effect of Heat Treatment and Addition of a Very Small Amount of Carbon on Transformation Texture in 0.03% Ti-Bearing Extra-low Carbon Steel"Proceedings of Thermec 2000. (2001)

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Masatoshi Sudo et al.: "Effect of Heat Treatment and Addition of a Very Small Amount of Carbon on Transformation Texture in 0.03% Ti-Bearing Extra-low Carbon Steel"Proceedings of Thermec 2000. (2001)

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須藤正俊,脇川師丞 他: "1%Mn-0,034%Ti添加極低炭素鋼板の変態集合組織に及ぼす微量炭素添加量の影響"鉄と鋼. 87. (2001)

Masatoshi Sudo、Shijo Wakikawa 等：“微量碳添加量对添加 1%Mn-0,034%Ti 的超低碳钢板的转变织构的影响”Tetsu-to-Hagane 87. (2001)。

Masatoshi Sudo, Shinji Wakikawa, Masahiro Okuno, and Ichiro Tsukatani: "Effect of addition of a very small amount of carbon on the transformation Texture in 1%Mn-0.034%Ti added extra-low carbon steel sheets"Tetsu-to-Hagane. 87 (2001)

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