航空材料学报2012，Vol.32Issue(4)：20-25,6.DOI:10.3969/j.issn.1005-5053.2012.4.004
大间隙钎焊用混合粉状高温镍基钎料的润湿性和显微组织
Wettability and Microstructures of High Temperature Ni-based Mixed Filler Powders for Wide Gap Brazing
摘要
Abstract
High temperature Ni-based mixed filler powders for wide gap brazing were produced by mixing a type of Ni-based high temperature filler powder containing aluminum and titanium and the γ 'precipitation strengthened Ni-based superalloy FGH95 powder. The experiment results indicate that the mixed powder filler metals with propermixing ratio possess good wetting and spreading performances on the stainless steel 1Cr18Ni9Ti . Alloying effects in the brazing metal are considerable, and the maximum total content of aluminum and titanium elements is surprisingly up to 5, 49% . The mixed brazing filler metals after high temperature brazing exhibit no remarkable element segregation except niobium and tungsten. After 1180℃/4h diffusion heat treatment, the element segregation is eliminated. The microstructures of the brazing metal are uniform comparatively , and characterized by equiaxed γsolid solution dendrites with interden-dritic blocky and short-stripy compounds and a little γ + γ'eutectic , and especially a large amount of fine dispersed γ' precipitation hardening phases distribute in the γ solid solution, as expected.关键词
镍基钎料/混合粉末/润湿性能/合金化/显微组织Key words
Ni-based filler metal/ mixed powder/ wettability/ alloying/ microstructure分类
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梁海,叶雷,毛唯..大间隙钎焊用混合粉状高温镍基钎料的润湿性和显微组织[J].航空材料学报,2012,32(4):20-25,6.基金项目
航空科学基金(2007ZE21005) （2007ZE21005）
