焊剂碱度对管线钢埋弧焊熔敷金属显微组织和韧性的影响  

Effect of Flux Basicity on Microstructure and Low Temperature Toughness of SAW Deposited Metals on Pipe-Line Steel

作　　者：国旭明[1] 钱百年[1] 张艳[2] 李晶丽[1] 杨柯[1] 

机构地区：[1]中国科学院金属研究所焊接室,辽宁沈阳110015 [2]沈阳工业大学材料系,辽宁沈阳110023

出　　处：《钢铁研究学报》2001年第5期51-54,共4页Journal of Iron and Steel Research

基　　金：国家"973"重大基础研究项目 ( G19980 6 15 11)

摘　　要：研究了焊剂碱度对管线钢埋弧焊熔敷金属显微组织和韧性的影响。结果表明 :随焊剂碱度的提高 ,焊缝中锰、钛含量增加 ,而氧、硅含量降低 ,同时具有有利于针状铁素体形核的夹杂物尺寸和分布 ,促进了奥氏体晶粒内针状铁素体的形成 。The effect of flux basicity on the microstructures and toughness of SAW deposited metals on pipe line was investigated. The results showed that the contents of Mn? Ti are increased and the contents of O? Si are reduced with the increasing of flux basicity. The quantity of the inclusions with suitable size favorable to nucleation of acicular ferrite is increased, then the formation of acicular ferrite in austenite is promoted and the low temperature toughness of deposited metals is increased.

关 键 词：管线钢 焊剂碱度 针状铁素体 低温韧性 埋弧焊 熔敷金属 

分 类 号：TG423[金属学及工艺—焊接]