热等静压对12Cr13/304L扩散焊界面组织演化的影响  

Influence of Hot Isostatics Pressing on the Microstructure Evolution of 12Cr13/304L Interface

作　　者：张龙戈 王彩芹[1,2] 史振晶 周双双 董浩 南灏[1,2] 赵万林 王铁军 宋頔琛[3] ZHANG Longge;WANG Caiqin;SHI Zhenjing;ZHOU Shuangshuang;DONG Hao;NAN Hao;ZHAO Wanlin;WANG Tiejun;SONG Dichen(Advanced Technology&Materials Limited Company,Beijing 100081,China;Hot Isostatic Pressing Technology Innovation Center of Hebei Province,Baoding 072750,Hebei,China;Central Iron&Steel Research Institute,HIPEX,Co.,Ltd.,Beijing 100081,China)

机构地区：[1]安泰科技股份有限公司,北京100081 [2]河北省热等静压技术创新中心,河北保定072750 [3]钢研昊普科技有限公司,北京100081

出　　处：《材料导报》2024年第S02期352-354,共3页Materials Reports

摘　　要：采用热等静压(Hot isostatic pressing,HIP)工艺对12Cr13/304L进行连接,分析连接界面的微观组织和力学性能。结果表明:HIP工艺有效实现了两种材料的扩散连接,异种金属连接接头结合良好,两侧基体元素发生了明显的互扩散,形成了10μm厚的组织分布均匀的扩散层,扩散层靠近12Cr13一侧存在一定宽度的长条状扩散影响区,此区域为垂直于焊缝的柱状晶。硬度试验结果表明,焊接接头区域硬度接近304L母材硬度,扩散层硬度均匀,无接头硬化现象,这是由于HIP工艺过程中温度缓升缓降,有效改善了12Cr13的硬化现象。室温拉伸试验结果表明,接头抗拉强度略高于母材12Cr13,最大抗拉强度为579 MPa,12Cr13经过HIP工艺处理后,马氏体分解,残留奥氏体发生了转变,碳化物大量析出弥散分布形成了第二相强化机制,使得12Cr13母材和连接接头具有良好的力学性能。Hot isostatic pressing(HIP)was used to bond 12Cr13 and 304L stainless steel,and the microstructure and mechanical properties of the bonding interface were analyzed.The results show that the dissimilar metal joints are well bonded by the HIP process,and the elements on both sides of the matrix obviously have mutual diffusion,forming the diffusion layer with a thickness of 10μm.There is a certain width of elongated diffusion influence zone on the side of the diffusion layer near 12Cr13,which is a columnar crystal perpendicular to the weld seam.The hardness test results show:the hardness of the welding joint area is close to 304L,and the hardness of the diffusion layer is uniform and there is no joint hardening phenomenon,due to the gradual increase and decrease of temperature during the HIP process,which effectively improves the hardening phenomenon of 12Cr13.The hardness of the connecting joint should be higher than that of the base material 12Cr13.The results of the room temperature tensile test show that the tensile strength of the joint is slightly higher than that of the weak 12Cr13 base metal,with a maximum tensile strength of 579 MPa.After the HIP process treatment of 12Cr13,martensite decomposes,residual austenite undergoes transformation,and a large amount of carbides precipitate and disperse to form a second phase strengthening mechanism,which makes the base material 12Cr13 and the connecting joint have good mechanical properties.

关 键 词：热等静压 12Cr13与304L 扩散连接 异质金属 

分 类 号：TG453[金属学及工艺—焊接]