Keywords Remanufacturing technology,spherical tank,residual stress,cracking cause,stress corrosion cracking,hydrogen induced cracking,safety assessment,heat treatment,repair-welding process;

• 关键词再制造技术;球罐;残余应力;应力腐蚀开裂;氢致裂纹;有限元分析;安全评定;热处理;补焊工艺;