电焊机2025，Vol.55Issue(3)：82-87,6.DOI:10.7512/j.issn.1001-2303.2025.03.11
镍基合金与不锈钢异种焊接接头全位置自动TIG焊接工艺研究
Study on All-position Automatic TIG Welding Technology for Dissimilar Joints of Nickel-based Alloy and Stainless Steel
李洋 1徐睦忠 1刘自刚 1代锋先 2李新华 3邢丽1
作者信息
- 1. 浙江巴顿焊接技术研究院,浙江 杭州 311200
- 2. 浙江巴顿焊接技术研究院,浙江 杭州 311200||浙江金旦智能科技有限公司,浙江 杭州 311215
- 3. 一重集团大连核电石化有限公司,辽宁 大连 116113
- 折叠
摘要
Abstract
To address the manufacturing requirements of dissimilar steel(SA508 Gr.3 Cl.1/SA182 Gr.F316LN)butt welds between reactor pressure vessels and main pipeline safe-ends,this study systematically investigates the characteristics of all-position automatic TIG welding processes.Comparative analysis of multi-layer single-pass welding(with tungsten oscilla-tion)and multi-layer multi-pass welding(without tungsten oscillation)reveals that:The multi-layer multi-pass welded joints exhibit no detectable ductility-dip cracking(DDC),achieve 100%nondestructive testing compliance,demonstrate room-temperature tensile strength of 665 MPa and high-temperature tensile strength of 547 MPa at 350 ℃,with maximum impact energy reaching 245 J(V-notch).All eight bending specimens show defect-free performance.In contrast,multiple 100～200 μm-scale DDC cracks were observed in multi-layer single-pass welded specimens.Experimental results confirm that multi-layer multi-pass welding effectively reduces crack susceptibility in nickel-based welds through controlled heat input(peak current 180-230 A,wire feed speed 70～130 cm/min)and optimized bead arrangement,producing uniform hardness distribu-tion(180～211 HV)and no intergranular corrosion cracking tendency.The comprehensive performance exceeds nuclear power standards,providing critical data support for engineering applications of thick-walled dissimilar steel structures.关键词
异种钢焊接/全位置自动TIG/镍基合金/多层多道焊/失塑裂纹Key words
dissimilar steel welding/all-position automatic TIG/nickel-based alloy/multi-layer multi-pass welding/ductility-dip cracking分类
矿业与冶金引用本文复制引用
李洋,徐睦忠,刘自刚,代锋先,李新华,邢丽..镍基合金与不锈钢异种焊接接头全位置自动TIG焊接工艺研究[J].电焊机,2025,55(3):82-87,6.
