热处理对40CrMnSiB低合金超高强度钢组织和性能的影响

特殊钢 ›› 2020, Vol. 41 ›› Issue (2): 47-49.

热处理对40CrMnSiB低合金超高强度钢组织和性能的影响

李建新, 王飞, 翟羽佳, 王瑞

抚顺特殊钢股份有限公司技术中心，抚顺113001

收稿日期:2019-09-11 出版日期:2020-04-01 发布日期:2022-04-21
作者简介:李建新(1971-),男,高级工程师(技术中心副主任),1995年辽宁工学院(本科)毕业，超高强度钢研发及生产。

Effect of Heat Treatment on Microstructure and Properties of 40CrMnSiB Low Alloy Ultra-High Strength Steel

Li Jianxin,Wang Fei, Zhai yujia , Wang rui

Technology Center,Fushun Special Steel Group Co. Ltd, Fushun 113001

Received:2019-09-11 Published:2020-04-01 Online:2022-04-21

摘要/Abstract

摘要： 采用OM、SEM、JMatPro7.0分析技术,研究了热处理工艺(860～950℃淬火+200～400℃回火)对新型中碳40CrMnSiB低合金超高强度钢(0.41C,0.84Cr,0.76Mn,1.44Si,0.006B)微观组织及力学性能的影响。结果表明:920℃淬火和300℃回火钢的力学性能达到最佳强韧性匹配,即抗拉强度为1 943 MPa、屈服强度为1 931 MPa、延伸率为9%、断面收缩率为39.5%、冲击吸收功为44J、HRC硬度值为52.7。

Abstract: The effects of heat treatment ( quenched at 860 〜950 °C + tempered at 200 ~ 400 ℃ ) on the microstructure and mechanical properties of a new medium carbon 40CrMnSiB low alloy ultra-high strength steel (0. 41C,0. 84Cr, 0.76Mn, 1.44Si,0. 006B) are investigated by OM,SEM and JMatPro7. 0 analysis techniques. The results show that with quenched at 920℃ . and tempered at 300 °C ,the mechanical properties of the steel reach the best toughness matching,that is,the tensile strength 1943 MPa,the yield strength 1931 MPa,the elongation 9% ,and the reduction of area 39. 5% , the impact absorption work 44 J,and the HRC hardness value 52.7.

李建新, 王飞, 翟羽佳, 王瑞. 热处理对40CrMnSiB低合金超高强度钢组织和性能的影响[J]. 特殊钢, 2020, 41(2): 47-49.

Li Jianxin, Wang Fei, Zhai yujia , Wang mi. Effect of Heat Treatment on Microstructure and Properties of 40CrMnSiB Low Alloy Ultra-High Strength Steel[J]. Special Steel, 2020, 41(2): 47-49.