烧结焊剂对低碳低合金高强钢焊缝成分组织性能的影响  

Effect of Sinter Flux on The Composition and Structure Properties of SMA Weld Metal of Mild Low Alloy High Strength Steel

作　　者：孟润泉[1] 雷胜利[1] 

机构地区：[1]中国石油天然气总公司焊接钢管研究所

出　　处：《焊管》1995年第4期19-23,共5页Welded Pipe and Tube

摘　　要：采用一种焊丝与不同焊剂相互匹配的焊接工艺方法，对平板焊接接头进行了低温夏比冲击试验，化学成分分析，金相组织分析，冲击断口的ＳＥＭ分析。试验说明烧结焊剂应用于低碳低合金高强钢高速焊接，可以提高焊缝金属的低温韧性，其基理在于烧结焊剂使焊丝、焊剂中的Ｍｎ、Ｓｉ、Ｍｏ、Ｖ、Ｔｉ等元素向焊缝组织得到不同的过渡，使焊缝组织先共折铁素体量减少，细小针状铁素体量增加，细化了焊缝金属组织，从而提高了焊缝金属的低温韧性。The welding technology which a kind of wire combined varieties of flux for plate welding is used. The welded joind is under low temperature Sharppy impact test, composition analysis, metallographic structure analysis and SEM analysis of impact fracture. The tests show that the high speed welding for mild low alloy high strength steel using sinter flux increase the low temperature toughness of weld metal. The mechanism is that the elements in the wire or flux such as Mn, Si, Mo, V, Ti can be transported to weld metal by using sinter flux. The amount of eutectoid ferritin advance reduce and fine pin ferrit increase, and the fine structure improve the low temperature toughness of weld metal.

关 键 词：焊剂 焊缝金属 焊接 接头 

分 类 号：TG42[金属学及工艺—焊接]