一种高强韧性高淬透性贝氏体型非调质钢
A Non-quenched and Tempered Bainitic Steel with High Strength-Toughness and Hardenability
摘 要
开发了一种高强韧性高淬透性贝氏体型非调质钢;对该钢的显微组织、力学性能和连续冷却转变(CCT)曲线进行了研究,并与42CrMo钢进行了强韧性比较.结果表明:试验钢在锻后空冷和砂冷后都得到贝氏体组织,强韧性接近;该钢具有良好的淬透性及较宽的贝氏体转变区,在低于0.05℃·s-1的冷却速率下才有少量铁素体析出;在350℃回火2 h后,其力学性能超过了传统调质钢42CrMo的水平.
淬透性
贝氏体
非调质钢
strength-toughness
hardenability
bainite
non-quenched and tempered steel
Abstract
A non-quenched and tempered bainitic steel with high strength-toughness and hardenability had been developed.The microstructure,mechanical properties and continuous cooling transformation (CCT) curves of the steel were studied,and its strength-toughness was compared with that of the 42CrMo steel.The results show that both the tested steels microstructure cooled at air and sand after forging was bainite and the strength-toughness was similar.The steel had good hardenalility and broad bainitic transformation.The ferrite did not appear as the cooling rate was lower than 0.05℃·s-1.The mechanical properties of the bainitic steel were better than those of traditional quenched and tempered steel 42CrMo after tempered at 350℃ for 2 h.
中图分类号 TG142.2
所属栏目 新材料 新工艺
基金项目 先进钢铁材料技术国家工程研究中心课题(D.09-0110-07-002)
收稿日期 2008/9/21
修改稿日期 2009/5/20
网络出版日期
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备注彭金明(1983-),男,湖北武汉人,硕士研究生.
引用该论文: PENG Jin-ming,LUO Yi,WANG Hong-bin,WU Xiao-chun. A Non-quenched and Tempered Bainitic Steel with High Strength-Toughness and Hardenability[J]. Materials for mechancial engineering, 2010, 34(8): 33～35
彭金明,罗毅,汪宏斌,吴晓春. 一种高强韧性高淬透性贝氏体型非调质钢[J]. 机械工程材料, 2010, 34(8): 33～35
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参考文献
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