Study on the Microstructure in Weld Metal of Cr-Ni Stainless Steel under Different Welding Technology

Abstract:

According to Cr-Ni stainless steel, three different welding technology and the appropriate welding process parameters were selected. Three welded joints of Cr-Ni stainless steel were prepared. The microstructure in weld metal zone of Cr-Ni stainless steel under different welding methods was studied by X-fluorescent chemical composition analysis and microstructure analysis. The results show that alloy composition of the weld metal are different and distribute unequally under different welding methods, microstructure morphology and grain size of the weld layer are quite different. the structure of bottom is small amount of γ phase and a little δ phase are combined together and cover is γ phase and Cu-wealthy phases in the welds under TIG-MAG welding. the structure of bottom is coarse columnar crystal and cover is typical cellular dendrite in the welds under TIG- TIG welding. the structure of bottom is tiny equiaxial dendrites and columnar crystal and cover is some γ phase and a little δ phase are combined together in the welds under TIG-SMAW welding.

• Periodical: Advanced Materials Research (Volumes 532-533)
• Pages: 66-69
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.532-533.66
• Online since: June 2012
• Authors: Hong Bo Li, Hai Tao Li, Mu Qin Li, Xing Jun Su, Chun Jie Li
• Keywords: Cr-Ni Stainless Steel, Weld Metal, Welding Technology

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