9Ni钢焊接接头低温性能研究  

Low temperature properties of welded joints for 9% Ni steel

作　　者：张敏[1] 褚巧玲[1] 李继红[1] 

机构地区：[1]西安理工大学材料科学与工程学院,陕西西安710048

出　　处：《兵器材料科学与工程》2013年第4期10-14,共5页Ordnance Material Science and Engineering

基　　金：国家自然科学基金(51274162);陕西省自然科学基金(2012JM6003);西安市科技计划项目(CX1250②);陕西重点学科建设经费资助

摘　　要：针对国产9Ni钢,对其进行焊接及热处理工艺制定。采用多层多道手工电弧焊,焊条为ENiCrMo-3,焊前不预热且严格控制层间温度;选择双相区处理工艺。通过高低温拉伸试验、低温冲击试验、硬度测试及金相组织观察检测焊接接头性能。结果表明,9Ni钢接头低温冲击韧性和抗拉强度均满足要求,对其制定的焊接和热处理工艺切实可行。The welding and heat treatment process of the 9% Ni steel were investigated. SMAW was employed as the joining technique and ENiCrMo？3 as the welding material. Multi？pass welding and low inter-pass temperature were also applied as well as the QLT（quenching＋intercritical quenching＋tempering）heat treatment process. The welded joints were investigated by high and low temperature tensile test,low temperature impact test,hardness test and optical microscope. The results show that the impact toughness and tensile strength meet the requirement,which proves that the welding and heat treatment process are feasible and practical.

关 键 词：9NI钢 焊接接头 低温冲击韧性 双相区处理 

分 类 号：TG142.71[一般工业技术—材料科学与工程]