氧对00Cr13Ni5Mo熔敷金属组织和韧性的影响

Effect of oxygen on toughness and microstructure of 00Crl3Ni5Mo deposited metal

摘要: 文中研究了MAG焊保护气体氧含量变化对00Cr13Ni5Mo熔敷金属中氧化物夹杂类型、尺寸、数量、分布和残余奥氏体、逆变奥氏体含量以及冲击韧性的影响.结果表明,Si-Mn-O,Si-Mn-Al-O复合氧化物夹杂是导致00Cr13Ni5Mo熔敷金属冲击韧性下降的主要原因.氧化物夹杂对00Cr13Ni5Mo熔敷金属回火过程中产生的逆变奥氏体具有抑制作用,随着氧化物夹杂的增加,逆变奥氏体含量呈减少趋势.

Abstract: The influence of oxygen content in shielding gas during MAG welding on the type, size, quantity, and distribution of oxide inclusion and the content of residual austenite, reversed austenite and impact toughness of 00Crl3Ni5Mo deposited metal was investigated. It was found that Si-Mn-O, Si-Mn-Al-0 composite oxide inclusions were the main reason for the degradation of impact toughness of 00Crl3Ni5Mo deposited metal. The oxide inclusions in 00Cr13Ni5Mo deposited metal could inhibit the generation of reversed austenite during tempering. With the increase of oxide inclusions, the content of reversed austenite decreased.