摘要
研究了Si-Mn-Cr-Ni系低合金高强钢锻件在不同热处理工艺下的显微组织和力学性能。结果表明,试验钢经820℃正火后,锻件组织细化效果较好且分布均匀,再经920℃淬火和280℃低温回火后,其硬度为43.9 HRC,冲击吸收能量KV_(2)为82.6 J,抗拉强度为1513.35 MPa,屈服强度为1221.92 MPa,伸长率为14.65%,此时组织为回火板条马氏体且晶粒尺寸细小,晶粒度为8.3级,达到最佳的强韧性匹配,试验钢的综合力学性能最优。
Microstructure and mechanical properties of Si-Mn-Cr-Ni low alloy high strength steel under different heat treatment processes were studied.The results show that when normalized at 820 ℃,the microstructure of the tested steel is fine and evenly distributed,when followed by quenching at 920 ℃ and tempering at 280 ℃,the hardness of the steel is 43.9 HRC,the impact absorbed energy KV_(2) is 82.6 J,the tensile strength is 1513.35 MPa,the yield strength is 1221.92 MPa and the elongation is 14.65%.Moreover,the microstructure is tempered lath martensite with fine grain size of grade 8.3,which achieves the best strength-toughness matching and the best comprehensive mechanical properties.
作者
李世文
熊伟
张文亮
王超
高占勇
Li Shiwen;Xiong Wei;Zhang Wenliang;Wang Chao;Gao Zhanyong(School of Materials Metallurgy,Inner Mongolia University of Science and Technology,Baotou Inner Mongolia 014010,China;The First Military Representative Office of the Army Armament Department Stationed in Baotou Area,Baotou Inner Mongolia O14030,China;Inner Mongolia Special Equipment Inspection and Research Institute Baotou Branch,Baotou Inner Mongolia 014010,China;Ordos Electric Power Metallurgical Group,Ordos Inner Mongolia 016100,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2023年第7期157-161,共5页
Heat Treatment of Metals
关键词
低合金高强钢
热处理工艺
显微组织
晶粒尺寸
力学性能
low alloy high strength steel
heat treatment process
microstructure
grain size
mechanical properties
