焊后热处理对SA335 P5耐热钢焊接接头力学性能的影响  

Effect of post weld heat treatment on mechanical properties of SA335 P5 heat-resistant steel welded joint

作　　者：岳力武 张平 郑振太[3] 郭东辉 YUE Liwu;ZHANG Ping;ZHENG Zhentai;GUO Donghui(Technology Department,Peiyang Chemical Equipment Co.,Ltd.,Tianjin 301600,China;School of Electrical and Information Engineering,Tianjin University,Tianjin 300072,China;School of Materials Science and Engineering,Hebei University of Technology,Tianjin 300130,China)

机构地区：[1]天大北洋化工设备有限公司技术部,天津301600 [2]天津大学电气自动化与信息工程学院,天津300072 [3]河北工业大学材料科学与工程学院,天津300130

出　　处：《焊接技术》2022年第7期53-57,I0008,共6页Welding Technology

基　　金：天津市科技计划项目(科技重大专项与工程)(18ZXJMTG00020)。

摘　　要：为了解决SA335 P5耐热钢石油化工压力管道焊态接头的焊缝硬度过高、塑性变差导致接头综合力学性能较差的问题,分别对焊态、焊后火焰热处理和焊后电热处理的SA335 P5耐热钢焊接接头进行力学性能测试,并分析对比不同热处理工艺条件对SA335 P5耐热钢焊接接头力学性能的影响。结果表明:当电热处理温度为750℃,加热2.5 h时,硬度值为HV140,焊接接头的抗拉强度为503.7 MPa,伸长率达到50.07%,满足石油化工行业标准对SA335 P5钢焊接接头综合力学性能的要求。In order to solve the problem of excessive hardness,strength and plasticity deterioration of welds in SA335 P5heat-resistant steel welded joint of petrochemical pressure pipeline,the mechanical properties of SA335 P5 heat-resistant steel welded joints after welding,post weld flame heat treatment and post weld electrothermal treatment were tested,and the effects of different processing conditions on the mechanical properties of SA335 P5 heat-resistant steel welded joints were analyzed. The results showed that when the electric heat treatment temperature was 750 ℃ for 2. 5 h,the tensile strength of the welded joint reaches 503. 7 MPa. At the same time,the hardness value was HV170,and the elongation reaches 50. 07%. The results met the requirements of the petrochemical industry for the mechanical properties of SA-335 P5 steel welded joints.

关 键 词：焊后热处理 耐热钢 力学性能 

分 类 号：TG407[金属学及工艺—焊接]