化学冶金因素对埋弧焊焊缝硫磷含量的影响  

Effect of chemical metallurgical factors on contents of phosphorus and sulphur in weld metal during submerged arc welding

作　　者：薛松柏[1] 叶栋林[1] 王哈玲 

机构地区：[1]机械部哈尔滨焊接研究所

出　　处：《焊接学报》1993年第4期215-220,共6页Transactions of The China Welding Institution

摘　　要：通过试验和理论分析,探讨了在埋弧焊过程中,熔池中S、P的脱去过程,主要是以分别生成硫酸盐和磷酸盐的形式进行的化学冶金反应,并提出了熔池中的硫、磷脱去过程存在一个极限值,而这个极限值与焊剂的碱度和焊剂、焊丝及母材中的硫、磷含量有关.在焊剂碱度B_1≥2.5的高碱度焊剂中,根据焊丝或焊剂中硫含量的不同,熔敷金属中硫的极限值可低于焊丝中的硫含量或接近焊剂中的硫含量;而磷的极限值为0.010%±0.002.The mechanism of dephosphorization and desulphurization in melting pool during submerged arc welding has been investigated by experiments and theoretical analyses. It is found that the dephosphorization and desultphurization are mainly done by the metallurgical reactions of forming phosphates and sulphates respectively, and that there is a limit for the dephosphorization and desulphurization in the melting pool. The limit value depends on the basicity of flux as well as the contents of phosphorus and sulphur in the wire and the base metal. For high basicity fluxes of B_1≥2.5, the limit value of sulphur in weld metal can be lower than that in the wire or can be close to that in the flux according to the content of sulphur in wire or flux, and the limit value of phosphorus is about 0.010% ±0.002.

关 键 词：埋弧焊 焊剂 冶金 脱硫 脱磷 

分 类 号：TG406[金属学及工艺—焊接]