乙烯球罐用9％Ni钢焊接接头低温断裂韧度J_（IC）及J_R阻力曲线的试验研究

Study on Low-Temperature Fracture Toughness J_(IC) and J_R Curves of 9% Ni Steel Welding Joints for Ethylene Spherical Tanks

按ＡＳＴＭＥ１１５２—８７、Ｅ８１３—８９和我国ＧＢ２０３８—９１标准，用单试样卸载柔度法完成了９％Ｎｉ钢３种焊接接头的低温断裂韧度Ｊ（ＩＣ）和ＪＲ阻力曲线的测试。通过分析验证，采用国产Ａ５５７焊材修复球罐是可行的。

Abstract According to standard test method for J-integral characterization of fracture toughness ASTM Standards: L,1152 87, E813 89 and GB 2038 91 of China,the low-temperature fracture toughness J_(IC) and J_R curves have been measured and determined by single-specimen technique. The conclusion has gained that the ethylene spherical tank should be reqaired with A557 Welding rod.