MAO Qiqin, WANG Long.Study on TIG Welding Process and Quality Control of Pure Nickel and N10003 Hastelloy Alloy[J].Electric Welding Machine, 2023, 53(12): 22-27. DOI： 10.7512/j.issn.1001-2303.2023.12.03.
Study on TIG Welding Process and Quality Control of Pure Nickel and N10003 Hastelloy Alloy
Based on the thori-based molten salt reactor nuclear energy vessel manufacturing project, the welding process of pure nickel N02201 and N10003 Hasloy alloys was studied by using TIG. Nondestructive testing, mechanical property testing and macroscopic metallographic testing were used to verify the mechanical properties and microstructure of welded joints. At the same time, the quality control measures of pure nickel N10003 and Hastelloy N10003 welding are discussed. An ideal welding process suitable for the welding of pure nickel and Hastelloy alloy was developed. The result shows that: During welding, welding heat input and interlayer temperature should be strictly controlled. Excessive increase of welding current cannot effectively improve the fluidity of liquid metal, on the contrary, it will increase the probability of hot cracks in the weld. Attenuating current should be used to avoid arc pit crack. The microstructure of welded joint is composed of austenite and a small amount of ferrite, The weld center grain grows dendritically from the fusion zone to the weld center, A small number of carbides precipitated in the fusion zone on N02201 side, and the boundary of the fusion line on N10003 side was obvious. no defects appeared in joints; All the properties meet the relevant standards.
pure nickelHastelloy alloywelding processquality control
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