Effect of C on TIG In-situ Alloying Welding of MGH956 Alloy

Effect of C on TIG In-situ Alloying Welding of MGH956 Alloy

MGH956 alloy was welded by TIG in-situ alloying welding with homemade filler material. The in-situ alloying mechanism and behavior of C in the TIG welding process were mainly analyzed. The results show that the partial pressure effect of C to N can reduce the solubility of N in the welding pool. Thi...

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Veröffentlicht in:Cai liao gong cheng = Journal of materials engineering 2014-10 (10), p.40-46
Hauptverfasser: Ren, Dan, Lei, Yu-Cheng, Liu, Fa-Qiang, Li, Meng-Gang
Format: Artikel
Sprache:chi
Schlagworte:
Alloying
Fillers
Grain size
Materials engineering
Mechanical properties
Solubility
Welded joints
Welding
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Zusammenfassung:MGH956 alloy was welded by TIG in-situ alloying welding with homemade filler material. The in-situ alloying mechanism and behavior of C in the TIG welding process were mainly analyzed. The results show that the partial pressure effect of C to N can reduce the solubility of N in the welding pool. This eliminates the nitrogen porosity in welding process. TiC particles with the size of 50-100 nm form and distribute uniformly in the weld. Addition of moderate C to filler material can refine the grains size and improve the mechanical properties of weld. Thus the comprehensive properties of the weld are improved.
ISSN:1001-4381
DOI:10.11868/j.issn.1001-4381.2014.10.008