纳米贝氏体钢的焊接方法及接头组织分析  

Welding Method and Welded Joint Microstructure Analysis of Nanostructured Bainite Steels

作　　者：潘强 杨倩 王艳辉 赵雷杰 徐东[3] 李丽[1] PAN Qiang;YANG Qian;WANG Yanhui;ZHAO Leijie;XU Dong;LI Li(Key Laboratory of Intelligent Industrial Equipment Technology of Hebei Province,School of Mechanical and Equipment Engineering,Hebei University of Engineering,Handan 056038,China;National Engineering Research Center for Equipment and Technology of Cold Strip Rolling,Yanshan University,Qinhuangdao 066004,China;Hebei Technological Innovation Center for High Quality Cold Heading Steel,Hebei University of Engineering,Handan 056038,China)

机构地区：[1]河北工程大学河北省智能工业装备技术重点实验室机械与装备工程学院,河北邯郸056038 [2]燕山大学国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004 [3]河北工程大学河北省高品质冷镦钢技术创新中心,河北邯郸056038

出　　处：《铸造技术》2021年第9期825-830,共6页Foundry Technology

基　　金：国家自然科学基金(52001105);河北省自然科学基金(E2019402433);河北省高等学校科学技术研究项目(BJ2021012);河北省研究生创新资助项目(CXZZSS2021085);河北省高品质冷镦钢技术创新中心开放课题。

摘　　要：纳米贝氏体钢作为新一代钢种,其抗拉强度可达2500 MPa,断裂韧性超过30~40 MPa·m^(1/2),硬度为600~670 HV,在工业中得到广泛应用。但由于纳米贝氏体钢中往往含有一定数量的脆性马氏体晶体结构,导致其焊接难度大,焊接接头易产生裂纹,难以达到与母材相同的强度和硬度,这就限制了其应用范围。综述了近年来纳米贝氏体钢焊接方面的研究进展,阐述了在不同焊接方法下焊接接头的显微组织变化。As a new generation of steel,nanobainitic steel has a tensile strength of 2500 MPa,a fracture toughness of more than 30~40 MPa·M^(1/2),and a hardness of 600~670 HV,which has been widely used in industry.However,because the nanobainite steel often contains a certain amount of brittle martensite crystal structure,it is difficult to weld,the welded joint is easy to crack,and it is difficult to reach the same strength and hardness as the base metal,which limits its application scope.In this paper,the research progress of nano-bainitic steel welding in recent years is reviewed,and the microstructure changes of welds under different welding methods are described.

关 键 词：纳米贝氏体钢 焊接 冷裂纹 马氏体 奥氏体 

分 类 号：TG142[一般工业技术—材料科学与工程] TG47[金属学及工艺—金属材料]