Intermediate Transformation Structure and Mechanical Properties of High Strength Low Carbon Bainite Steel

机译：高强度低碳贝氏体钢的中间相变组织和力学性能

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Isothermal heat-treatment test and continuous cooling test of Mn-Cu-Nb-B low carbon bainitic steel show that quasi-polygonal ferrite, acicular ferrite and lath-like bainite would be formed at different temperature ranges, and the multi-phase of intermediate transformation products such as quasi-polygonal ferrite, granular bainite, lath-like bainite and M/A can be formed during continuous cooling. The cooling rate and finish temperature of accelerated cooling have much effect on the final microstructure and mechanical properties. When finish temperature is selected around 625°C, proper combination of quasi-polygonal ferrite, granular bainite and fine M/A can be obtained. The yield stress of this type of microstructure can reach 600MPa, meanwhile the plasticity and the impact toughness are also good. The controlled cooling process influences the intermediate transformation products, in this way the mechanical properties of low carbon bainite steel can be optimized.

机译：Mn-Cu-Nb-B低碳贝氏体钢的等温热处理和连续冷却试验表明，在不同温度范围内会形成准多边形铁素体，针状铁素体和板条状贝氏体，中间相为多相。在连续冷却过程中会形成准多边形铁素体，粒状贝氏体，板条状贝氏体和M / A等相变产物。加速冷却的冷却速率和完成温度对最终的组织和机械性能有很大影响。当最终温度选择在625°C附近时，可以得到准多边形铁素体，粒状贝氏体和精细M / A的适当组合。这种类型的微结构的屈服应力可以达到600MPa，同时塑性和冲击韧性也很好。受控的冷却过程会影响中间相变产物，因此可以优化低碳贝氏体钢的机械性能。

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《Iron Steel Supplement 2005 vol.40: The Joint International Conference of HSLA Steels 2005 and ISUGS 2005》|2005年|P.440-444|共5页
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SHANG Cheng-jia; NIE Yi; HE Xin-lai; HOU Hua-xin; HAO Sen; YU Gong-li;
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正文语种
中图分类钢铁冶炼（黑色金属冶炼）（总论）;
关键词
low carbon bainite steel; intermediate transformation structure; control cooling;

机译：低碳贝氏体钢;中间相变组织;控制冷却;

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Intermediate Transformation Structure and Mechanical Properties of High Strength Low Carbon Bainite Steel

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