高温变形后的停留处理对不含铌、钛元素超低碳钢中温相变的影响
Effect of Staying Treatment after High-Temperature Deformation on Intermediate-Temperature Phase Transformation of Ultra-low Carbon Steel without Nb and Ti Elements
摘 要
将Fe-0.05C-1.3Mn-0.35Ni-0.3Si-0.25Mo超低碳钢在850 ℃压缩变形后，分别进行了高温停留+直接冷却、高温停留+等温、直接等温和直接冷却等4种处理，研究了不同方式处理后试验钢的物相组成、显微组织和硬度，分析了高温停留对该钢中温相变的影响。结果表明：与直接冷却处理相比，高温停留使试验钢的中温相变易于发生和进行，且钢的硬度水平较高；高温停留处理使变形形成的位错纠缠变成位错胞结构，有利于束状贝氏体的形成，致使试验钢的硬度提高。
高温停留
显微组织
硬度
ultra-low carbon steel
high-temperature staying
microstructure
hardness
Abstract
The Fe-0.05C-1.3Mn-0.35Ni-0.3Si-0.25Mo ultra-low carbon steel was compression deformed at 850℃, and then treated by 4 different ways of high-temperature staying+direct cooling, high-temperature staying+isothermal treating, direct isothermal treating and direct cooling, respectively. The phase composition, microstructure and hardness of the tested steel after different treatments were studied, and the influence of high-temperature staying on the intermediate-temperature phase transformation characteristic of the steel was analyzed. The results show that comparing to the direct cooling treatment, the intermediate-temperature phase transformation of the tested steel occurred and continued more easily due to the high-temperature staying and the hardness of the steel was relatively high. The high-temperature staying treatment transformed the dislocation entanglement produced during the deformation into the dislocation cell structure, which was benefiting for the formation of sheaf-like bainite, resulting in the increase of hardness of the tested steel.
中图分类号 TG142.1 DOI 10.11973/jxgccl201708021
所属栏目 物理模拟与数值模拟
基金项目 天津市科技支撑重大项目（11ZCKFGX205000）
收稿日期 2016/7/11
修改稿日期 2017/6/28
网络出版日期
作者单位点击查看
备注王芳(1991-),女,内蒙古赤峰人,硕士研究生
引用该论文: WANG Fang,ZHANG Chuanfeng,LI Na,LIU Qingsuo. Effect of Staying Treatment after High-Temperature Deformation on Intermediate-Temperature Phase Transformation of Ultra-low Carbon Steel without Nb and Ti Elements[J]. Materials for mechancial engineering, 2017, 41(8): 93～97
王芳,张传峰,李娜,刘庆锁. 高温变形后的停留处理对不含铌、钛元素超低碳钢中温相变的影响[J]. 机械工程材料, 2017, 41(8): 93～97
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【3】李继红, 杨亮, 张兴璇,等. 超低碳微合金管线钢焊接接头的组织与冲击性能[J]. 机械工程材料, 2014, 38(6):75-78.
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【5】JIANG Q M,ZHANG X Q,CHEN L Q.Weldability of 1000 MPa grade ultra-low carbon bainitic steel[J]. Journal of Iron & Steel Research International, 2016, 23(7):705-710.
【6】尚成嘉,王学敏,杨善武,等.高强度低碳贝氏体钢的工艺与组织细化[J].金属学报, 2003, 39(10):1019-1024.
【7】赵路遇.超低碳贝氏体钢及其在舰船上的应用[J].材料开发与应用,2006,21(2):34-37.
【8】CHIOU C S, YANG J R, HUANG C Y. The effect of prior compressive deformation of austenite on toughness property in an ultra-low carbon bainitic steel[J]. Materials Chemistry & Physics, 2001, 69(1/2/3):113-124.
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【10】SHANG C J, ZHAO Y T, WANG X M, et al. Formation and control of the acicular ferrite in low carbon microalloying steel[J]. Materials Science Forum, 2005,475:85-88.
【11】WANG X, SHANG C, YANG S, et al. The refinement technology for bainite and its application[J]. Materials Science & Engineering A, 2006, 438:162-165.
【12】SHANG C, WANG X, YANG S, et al. Refinement of packet size in low carbon bainitic steel by special thermo-mechanical control process[J]. Journal of University of Science and Technology Beijing, 2004, 11(3):221-224.
【13】DONG H S, KIM B C, PARK K T, et al. Microstructural changes in equal channel angular pressed low carbon steel by static annealing[J]. Acta Materialia, 2000, 48(12):3245-3252.
【14】SHANG C, WANG X, HE X, et al. A special TMCP used to develop a 800 MPa grade HSLA steel[J]. Journal of University of Science and Technology Beijing, 2001, 8(3):224-228.
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