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通过焊缝抗裂性试验及焊接接头机械性能试验，对用于ＳＰＶ３５５ＮＳＲ钢制球罐的焊接工艺进行了系统的评价．同时还对ＳＰＶ３５５ＮＳＲ钢材在焊接过程中成分及组织的变化进行了一些研究．
The welding process of SPV355NSR steel spherical tank was systematically evaluated by the weld crack resistance test and the mechanical properties test of the welded joint. At the same time, some researches on the composition and microstructure of SPV355NSR steel during the welding process were also carried out.