TP304/Q235不锈钢复合钢板焊接组织性能研究  

Study on Welding Microstructure and Properties of TP304/Q235 Stainless Steel Composite Plate

作　　者：潘全喜[1] 刘志远[1] 王晓燕[1] 张德远 Pan Quanxi;Liu Zhiyuan;Wang Xiaoyan;Zhang Deyuan(Zhengzhou Technical College,Zhengzhou,Henan 450121,China;Luoyang Jinda Petrochemical Co.,Ltd.,Luoyang,Henan 471012,China)

机构地区：[1]郑州职业技术学院,河南郑州450121 [2]洛阳金达石化有限责任公司,河南洛阳471012

出　　处：《化工设备与管道》2024年第4期8-12,共5页Process Equipment & Piping

基　　金：河南省科技攻关项目(项目编号:242102220083)。

摘　　要：采用焊条电弧焊以及埋弧焊工艺对TP304/Q235复合钢板进行焊接试验,研究了焊接接头的显微组织、合金元素分布、力学性能和显微硬度。试验结果表明:复合钢板复层TP304焊缝和基层Q235焊缝的显微组织分别为奥氏体+铁素体(伴有魏氏组织)和铁素体+珠光体。复层TP304母材侧合金元素Cr、Ni的质量分数低于复层焊缝侧,随着距离复层母材位置的增加,Cr、Ni的质量分数表现出了缓慢上升的趋向,整体呈阶梯状分布。复合板接头抗拉强度处于TP304母材和Q235母材之间,且断裂位置为母材处。复层TP304侧焊接接头和基层Q235侧焊接接头的显微硬度分布趋势相似,表现为热影响区和焊缝金属的硬度值高于母材,且峰值都出现在热影响区内,分别为265 HV左右和440 HV左右。综上所述,在本次试验研究条件下,所得到的TP304/Q235复合钢板组织性能优越,保证了接头质量,为不锈钢复合钢板在化工生产和石油管道等领域的应用积累了经验。In order to study the microstructure,alloy element distribution,mechanical properties and microhardness of the welded joint,the welding test of TP304/Q235 composite plate was carried out by electrode arc welding and submerged arc welding.The test results demonstrate that the microstructure of composite plate TP304 weld and base Q235 weld is austenite and ferrite(with widmanstatten structure)and ferrite and pearlite,respectively.The mass fraction of alloy elements(Cr and Ni)on the side of clad TP304 base metal is lower than that on the side of clad weld.With the increase of the distance from the clad base metal,the mass fraction of Cr and Ni gradually rises,showing a stepped distribution.The tensile strength of the composite plate joint is larger than that of TP304 base metal and lower than that of Q235 base metal,and the fracture occurs in the area of the base metal.In addition,the welded joint on the side of either the clad TP304 or the base Q235 presents the similar microhardness distribution,which is verified by that the microhardness values of the heat affected zone and the weld metal are higher than that of the base metal,and the peak value falls in the heat affected zone(about 265 HV for TP304 and 440 HV for Q235,respectively).To sum up,under the conditions in this study,the obtained TP304/Q235 composite steel plate features superior microstructure and properties,which ensures the joint quality.This study is supposed to provide experience for the application of stainless steel composite steel plate in chemical production,oil pipeline and so on.

关 键 词：复合钢板 焊接工艺 元素分布 显微硬度 力学性能 

分 类 号：TG457.11[金属学及工艺—焊接]