摘要
通过对钎焊过程中金属氧化物稳定性及其还原机理的分析,表明在炉中钎焊异种金属不锈钢与铝的过程中,选择合适的保护气氛有利于获得稳定的焊接质量。选择还原气体氨分解气(或氢气)作保护气氛,有助于钎焊过程顺利进行,但使用时存在安全问题。炉中钎焊不锈钢与铝使用钎剂时,无论采用氨分解气还是惰性气体纯氮气作保护气氛,对焊接质量几乎无影响,钎焊样品的焊缝强度均可达 65MPa。选择惰性气体氮气作保护气氛,可极大地提高钎焊过程的安全性,并降低成本。
Through the analysis of the stability of metal oxides and the reduction mechanism during the brazing process, it is shown that in the process of brazing stainless steel and aluminum heterometals in the furnace, the selection of appropriate protective atmosphere is conducive to obtaining stable welding quality. The choice of reducing gas hydrogen or ammonia decomposition gas as protective atmosphere is helpful to the brazing process, but there are safety problems. When brazing stainless steel and aluminum in furnace use brazing flux, no matter ammonia decomposed gas or pure nitrogen as protective atmosphere, it has little effect on welding quality. The tensile strength of brazing samples can reach 65MPa. However, the safety of brazing process can be greatly improved by selecting the cheap inert gas nitrogen as the protective atmosphere.
作者
余华钢
张碧波
刘福平
陈妙清
YU Hua-gang;ZHANG Bi-bo;LIU Fu-ping;CHEN Miao-qing(Guangdong Welding Institute (China-Ukraine E.O.Paton Institute of Welding), Guangzhou 510651, Guangdong, China)
出处
《铜业工程》
CAS
2019年第4期46-49,共4页
Copper Engineering
基金
广州市科技计划项目(201704030113)
广东省科技计划项目(2014B070705007)
关键词
炉中钎焊
不锈钢
铝
异种金属
保护气氛
钎剂
furnace brazing
Stainless steel
Aluminum
heterometal
protective atmosphere
brazing flux
