S32205雙相不銹鋼薄壁焊管生產(chǎn)工藝初探

Study on Manufacturing Process for Light-wall Welded Pipe in S32205 Dual Phase Stainless Steel

摘要: 介紹了等離子弧焊接雙相不銹鋼S32205薄壁管的試制過程。通過研究顯微金相、常溫拉伸、點腐蝕和爆破等試驗結(jié)果,分析了熱處理對焊縫組織和性能的影響。提出要嚴(yán)格控制雙相不銹鋼S32205熱處理的溫度和時間,否則容易保留過量的鐵素體,甚至析出σ或χ等脆性相,影響焊接接頭性能。

Abstract: Described in the article is the trial manufacture of the plasma arc-welded light-wall pipe in S32205 dual phase stainless steel. The influence on the weld seam structure and properties by heat treatment is investigated on the basis of the results of micro-metallographic test, tensile test under ambient temperature, spot corrosion test and explosion test, etc. It is concluded that both the temperature and time of heat treatment of S32205 dual phase stainless steel must be strictly controlled, otherwise excessive amount of ferrite will remain, and even σ or x brittle phase will be segregated, resulting in negative influence on the weld joint properties.