采用光学显微镜、扫描电镜和能谱分析对马氏体时效钢(C300级)钨极氩弧焊焊缝中偏析的合金元素在不同温度固溶时均匀化情况进行了初步的计算和分析。研究认为C300钨极氩弧焊焊缝中主要偏析合金元素是Ni,Mo,Ti;焊缝经1200℃/lh AC处理可以获得成分均匀的马氏体;成分均匀的焊缝进行480℃/4h AC时效处理将不再产生逆转变奥氏体。
The preliminary calculation and investigation of the homogenizations of segregation alloying elements in maraging steel (C300 grade) TIG (Tungsten Inter Gas Welding, TIG) weld treated at different solution temperatures were carried out by means of OM, SEM and EDS. The results indicate that the main alloying elements in the weld of C300 are Ni, Mo, Ti; Martensite with uniform composition can be obtained by 1200℃/1 h AC (Air Cooling) treatment for the weld. Weld with uniform composition would no longer produce reverted austenite after 480℃/4h AC processing.