回火温度对含硼高强钢显微组织和力学性能的影响
Effects of Tempering Temperature on Microstructure and Mechanical Properties of High-Strength Boron Steel
摘 要
对一种含硼高强钢进行轧制和淬火处理后，再在200~600 ℃进行回火处理，研究了回火温度对其显微组织和力学性能的影响。结果表明：随着回火温度的升高，试验钢的显微组织由针状马氏体转变为板条状马氏体，其强度和硬度降低，伸长率增大，而冲击功先增后降再增；在300~400 ℃回火后，试验钢出现了较明显的回火脆性现象，Fe-C-B化合物在晶界的析出是产生回火脆性的主要原因。
回火温度
显微组织
力学性能
回火脆性
high-strength boron steel
tempering temperature
microstructure
mechanical property
tempering brittleness
Abstract
A high-strength boron steel was tempered at 200-600℃ after rolling and quenching, and then the effects of tempering temperature on the microstructure and mechanical properties of the steel were studied. The results show that with the increase of tempering temperature, the microstructure of the tested steel changed from needle-like martensite to lath-like martensite. The strength and hardness decreased while the elongation increased and the impact energy first increased then decreased and then increased. The obvious phenomenon of tempering brittleness of the tested steel appeared after tempering at 300-400℃, which was mainly caused by the precipitation of Fe-C-B type compound at the grain boundary.
中图分类号 TG142 DOI 10.11973/jxgccl201708014
所属栏目 材料性能及应用
基金项目 湖南省高校科研项目（15C0468）
收稿日期 2016/6/14
修改稿日期 2017/5/18
网络出版日期
作者单位点击查看
备注谭海林(1968-),男,湖南株洲人,副教授,硕士
引用该论文: TAN Hailin,LAI Chunming,ZHOU Jialin,WANG Ming. Effects of Tempering Temperature on Microstructure and Mechanical Properties of High-Strength Boron Steel[J]. Materials for mechancial engineering, 2017, 41(8): 63～66
谭海林,赖春明,周家林,王明. 回火温度对含硼高强钢显微组织和力学性能的影响[J]. 机械工程材料, 2017, 41(8): 63～66
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参考文献
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【13】程俊业, 赵爱民, 陈银莉, 等. 低温临界区退火时间对22MnB5钢组织和性能的影响[J]. 材料科学与工艺, 2012, 20(4):38-44.
【2】NIKRAVESHA M, NADERIB M, AKBARIA G H. Influence of hot plastic deformation and cooling rate on martensite and bainite start temperatures in 22MnB5 steel[J]. Materials Science and Engineering A, 2012,540:24-29.
【3】居殿春,刘家琪, 卢军辉, 等. 钛对含硼热冲压成形用钢组织和性能的影响[J]. 机械工程材料, 2012, 36(8):6-9.
【4】NISHIBATA T, KOJIMA N. Effect of quenching rate on hardness and microstructure of hot-stamped steel[J]. Journal of Alloys and Compounds, 2013,577(S1):S549-S554.
【5】居殿春,刘家琪, 卢军辉, 等. 固溶硼对高强度低合金钢机械性能的影响[J]. 钢铁研究学报, 2010, 22(3):38-41.
【6】佴启亮, 郑文杰, 宋志刚, 等. 硼含量对含硼不锈钢组织和性能的影响[J]. 钢铁研究学报, 2013, 25(6):53-57.
【7】颜慧成, 曹慧泉, 罗登. 钛、铌、硼对低碳贝氏体钢组织与性能的影响[J]. 钢铁研究学报, 2010, 22(5):55-58.
【8】MIN J Y, LIN J P, XIN L J,et al. The effect of pre-deformation at elevated temperatures on the microstructure and hardness of boron steel 22MnB5[J]. Journal of Iron and Steel Research, International, 2011, 18(S1):600-604.
【9】张涛, 侯华兴, 衣海龙, 等. 硼含量及热处理对低碳贝氏体钢组织与性能的影响[J]. 金属热处理, 2011, 36(11):76-80.
【10】GOLLING S, ÖSTLUND R, OLDENBURG M. Characterization of ductile fracture properties of quench-hardenable boron steel:Influence of microstructure and processing conditions[J]. Materials Science and Engineering A, 2016,658:472-483.
【11】狄国标, 杨永达, 麻庆申, 等. 硼及回火温度对超高强海洋工程用钢板组织及性能的影响[J]. 钢铁研究学报, 2014, 26(12):65-69.
【12】鲍姚亮, 蒋业华, 岑启宏, 等. 淬火工艺对中碳高硼铁合金显微组织和力学性能的影响[J]. 材料研究学报, 2013, 27(1):65-69.
【13】程俊业, 赵爱民, 陈银莉, 等. 低温临界区退火时间对22MnB5钢组织和性能的影响[J]. 材料科学与工艺, 2012, 20(4):38-44.
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