热输入及热处理对12Cr2Mo1R钢埋弧焊熔敷金属组织和性能的影响  

Effect of heat input and heat treatment on microstructure and properties of deposited metal on 12Cr2Mo1R steel by submerged arc welding

作　　者：胡晓波 冯伟 徐锴 陈波 张庆素 Hu Xiaobo;Feng Wei;Xu Kai;Chen Bo;Zhang Qingsu(Harbin Well Welding Co.,Ltd.,Harbin 150028,Heilongjiang,China;Harbin Welding Institute,Harbin 150028,Heilongjiang,China)

机构地区：[1]哈尔滨威尔焊接有限责任公司,黑龙江哈尔滨150028 [2]哈尔滨焊接研究院有限公司,黑龙江哈尔滨150028

出　　处：《机械制造文摘（焊接分册）》2020年第6期7-12,共6页Welding Digest of Machinery Manufacturing

基　　金：国家重点研发计划重点专项(2017YFB0305303)。

摘　　要：对12Cr2Mo1R钢埋弧焊丝极材料进行了试验研究,分析了焊接热输入及焊后热处理对熔敷金属组织和力学性能的影响。结果表明,12Cr2Mo1R钢焊接材料熔敷金属组织主要为回火贝氏体。随着焊接热输入的增加,熔敷金属的强度呈下降趋势,而其冲击韧性先升高后降低。在焊接热输入20~28. 29 kJ/cm的范围内焊接,可以获得较好的强度和韧性。当焊接热输入为22 kJ/cm时,熔敷金属获得最佳韧性。随着回火参数P值的增加,熔敷金属的强度呈下降趋势,而其冲击韧性先升高后降低。试验用焊接材料的P值为19. 26~20. 71时,可以获得较好的强度和韧性。当P值为20. 62时,熔敷金属冲击韧性最佳。The wire material for submerged arc welding of 12 Cr2 Mo1 R steel was studied. Effects of welding heat input and post-welding heat treatment on microstructure and mechanical properties of the deposited metal were analyzed. The results showed that microstructure of the deposited metal of 12 Cr2 Mo1 R steel welding material was mainly tempered bainite. With the increase of welding heat input,the strength of the deposited metal decreased,while the impact toughness increased first and then decreased. In the welding heat input range of 20 ~28. 29 kJ/cm,good strength and toughness could be obtained. When the welding heat input was 22 kJ/cm,the deposited metal obtained the best toughness. With the increase of the tempering parameter P,the strength of the deposited metal decreased,while the impact toughness increased first and then decreased. When the P value of the welding material was 19. 26 ~ 20. 71,good strength and toughness could be obtained. When the P value was20. 62,the impact toughness of the deposited metal was the best.

关 键 词：焊接热输入 热处理 显微组织 力学性能 

分 类 号：TG423[金属学及工艺—焊接]