电渣熔铸ZG14Ni3CrMoV低合金高强度钢力学性能研究  

Research on Mechanical Properties of ZG14Ni3CrMoV Low Alloy High Strength Steel by Electroslag Remelting Casting

作　　者：王宇 娄延春 赵岭 王增睿 高云保 杜丘 韩智 于洪若 WANG Yu;LOU Yan-chun;ZHAO Ling;WANG Zeng-rui;GAO Yun-bao;DU Qiu;HAN Zhi;YUHong-ruo(National Key Laboratory of Advanced Casting Technologies,Shenyang 110022,Liaoning,China)

机构地区：[1]高端装备铸造技术全国重点实验室,辽宁沈阳110022

出　　处：《铸造》2023年第8期956-962,共7页Foundry

基　　金：国家自然科学基金面上项目(52175352)。

摘　　要：以ZG14Ni3CrMoV低合金高强度钢为原料,研究了电渣熔铸ZG14Ni3CrMoV的微观组织和力学性能。试验结果表明:ZG14Ni3CrMoV的微观组织主要变化温度为400℃、497℃、745℃、800℃、892℃、1080℃,通过试样的微观组织变化机制,制定了自耗电极和电渣熔铸钢锭的热处理工艺。热处理后电渣熔铸钢锭的金相组织主要为回火索氏体,细小且均匀;电渣熔铸钢锭的拉伸性能:R_(m)为684 MPa、R_(p0.2)为567 MPa、A为24%、Z为72%,X向及Y向的性能差异较小,拉伸断口韧窝尺寸均一、形状统一、分布均匀、深度基本一致且韧窝壁清晰光滑;电渣熔铸钢锭的冲击性能:-20℃为216 J、-40℃为172 J、-60℃为140 J、-80℃为102 J、-100℃为49 J,低温冲击性能裕量充足,相较于自耗电极有较大提升,冲击断口为典型韧性断裂。The microstructure and mechanical properties of ZG14Ni3CrMoV low alloy high strength steel by electroslag remelting casting were studied.Experimental results showed that the main in microstructure change temperature of ZG14Ni3CrMoV was 400℃,497℃,745℃,800℃,892℃,1080℃.The heat treatment process of consumable electrodes and electroslag ingots was formulated through the microstructure change mechanism of the samples.Tensile properties of electroslag ingots,R_(m) was 684 MPa,R_(p0.2) was 567 MPa,A was 24%,Z was 72%.The performance difference between X and Y directions was small,the tensile fracture dimples were uniform in size,shape,distribution,and depth,and the dimple wall was clear and smooth.Impact properties of electroslag ingots,-20℃was 216 J,-40℃was 172 J,-60℃was 140 J,-80℃was 102 J,-100℃was 49 J.The low temperature impact performance had sufficient margin,which was greatly improved compared to the consumable electrode,and the impact fracture was a typical ductile fracture.

关 键 词：电渣熔铸 低合金高强度钢 微观组织 力学性能 

分 类 号：TG243[金属学及工艺—铸造]