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13MnNiMoNbR钢具有较高的强度指标以及良好的冲击韧性,由于压力容器耐高温、耐高压的发展需求,13MnNiMoNbR钢在高压力容器方面的应用正在不断增加。根据GB4709-2007《压力容器用板标准》[1],13MnNiMoNbR钢应选用H08Mn2MoA焊丝匹配SJ101焊剂进行埋弧焊焊接。但对于大型压力容器,经热处理后,此焊接方式的抗拉强度不能满足国标要求。在此通过改变焊丝焊剂成分,选用H08Mn2MoA焊丝匹配SJ101焊剂进行埋弧焊焊接,并选择H10Mn2NiMoA焊丝同样匹配SJ101焊剂埋弧焊焊接进行比对分析并通过试验证明:采用H10Mn2NiMoA焊丝匹配SJ101焊剂明显提高了焊缝的抗拉强度,但接头的韧性低于设计要求性,故研究了两种埋弧焊工艺焊接13MnNiMoNbR钢焊缝韧性的差异。
13MnNiMoNbR steel has high strength index and good impact toughness. Due to the development of high temperature resistant and high pressure resistant pressure vessel, the application of 13MnNiMoNbR steel in high pressure vessel is increasing. According to GB4709-2007 “Pressure Vessel Plate Standard” [1], 13MnNiMoNbR steel should be used H08Mn2MoA welding wire matching SJ101 flux for submerged arc welding. However, for large pressure vessels, after heat treatment, the tensile strength of the welding method can not meet the national standard. Here by changing the composition of the wire flux, use H08Mn2MoA wire matching SJ101 flux for submerged arc welding, and choose H10Mn2NiMoA wire also match SJ101 flux submerged arc welding comparative analysis and test proved that: using H10Mn2NiMoA wire matching SJ101 flux significantly improved However, the toughness of the joints is lower than the design requirements. Therefore, the differences of the toughness between the two submerged arc welding processes of 13MnNiMoNbR steel are studied.