Cr对高强钢焊条焊缝组织和性能的影响  

Effect of Heat Chrome Element on Microstructure and Mechanical Properties of High-strength Steel Electrode Weld

作　　者：蔡养川[1] 罗震[1] 

机构地区：[1]天津大学材料科学与工程学院,天津300072

出　　处：《焊管》2015年第6期20-25,共6页Welded Pipe and Tube

摘　　要：基于Ni-Cr-Mo-V合金体系,研究了Cr对800 MPa高强钢焊条焊缝组织和性能的影响。研究结果表明,当w(Cr)<1.2%时,随着Cr含量的增加,焊缝金属强度和韧性逐渐升高;当w(Cr)>1.2%时,随着Cr含量的增加,焊缝金属强度逐渐升高,而韧性逐渐降低。焊缝熔敷金属中w(Cr)=1.2%时,可以使焊缝金属获得大量细小、均匀的粒状M/A组织,从而提高了焊缝的强度和韧性。Based on Ni-Cr-Mo-V alloy system, it studied the effect of chrome on weld microstructure and mechanical properties of800 MPa high strength steel electrode. Experimental results showed that, as the content of chrome less-than 1.2%, the weld metal strength and toughness gradually increase with the increase of the content of Cr; and when the content of chrome more-than 1.2%,the strength of weld metal gradually increases and the toughness gradually decreases with the increase of the content of Cr. As the content of Cr is 1.2%, the microstructure of weld metal is large number of wee and homogeneous M/A, which can enhance the strength and toughness of weld metal.

关 键 词：焊接 Ni-Cr-Mo-V合金体系 CR 800 MPa高强钢焊条 

分 类 号：TG421[金属学及工艺—焊接]