热处理对海洋用结构钢性能的影响  

Effect of Heat Treatment on Properties of Marine Structural Steel

作　　者：蒋世应[1] 周星[2] 

机构地区：[1]宜宾职业技术学院,四川宜宾644003 [2]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《热加工工艺》2017年第14期220-222,229,共4页Hot Working Technology

基　　金：北京市自然科学基金资助项目(2162024);四川省教育厅自然科学基金资助项目(15ZB0483)

摘　　要：以海洋结构低碳钢为研究对象,通过添加Ni、Mo、Mn等合金元素,熔炼制备了实验用钢。探讨了热处理工艺对实验钢力学性能的影响。结果表明:850℃一次淬火1 h+760℃二次淬火1 h,再经575℃进行回火处理2 h后的实验钢性能最佳,此时抗拉强度为1151.7 MPa,屈服强度为1127.9 MPa,断后伸长率为16.9%,冲击功为220.6 J。二次淬火和添加合金元素有助于回火稳定性的提高,同时可以细化晶粒,有利于实验钢力学性能的提高。Taking marine structural steel with low carbon as the research object, the experimental steel was prepared by adding element ofNi, Mo, Mn and other alloying elements. The influence of heat treatment process on mechanical properties of experimental steel was studied. The results show that after first quenching at 850 ℃ for 1 h, second quenching at 760 ℃ for 2 h, and tempering treatment at 575 ℃ for 2 h, the experimental steel can achieve the best properties. Under the condition, the tensile strength is 1151.7 MPa, the yield strength is 1127.9 MPa, the elongation is 16.9% and impact energy is 220.6 J. The two quenching and the addition of alloying elements can help to improve the tempering stability, at the same time, the grain can be refined, which is beneficial to the improvement of the mechanical properties of the experimental steel.

关 键 词：海洋用结构钢 热处理工艺 力学性能 显微结构 

分 类 号：TG156[金属学及工艺—热处理]