Modification of the structure and properties of heat-resistant alloys with the help of nanopowders of refractory compounds

Cao Lamei,Liu Guangxun,Gu Huaipeng,Liang Yan,Anatoly Nikolaevich Cherepanov,Vladimir E. Ovcharenko.,V. O. Drozdov

Manipulation, Manufacturing and Measurement the Nanoscale（2012）

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摘要

Influence of nanodispersed refractory compounds on structure and mechanical properties of heat-resistant alloys K403 and K4169 was investigated. Powders of chemical compounds TiN, TiCN, Y2O3 and their mixtures were used as the modifying agents. The results show that the modifying leads to general improvement of grain and carbide structure of heat-resistant alloys in casts. The grain average size in the cast decreased by 2-3 times, the carbide grains size decreased from 40-60 μm to 10-20 μm. This leads to significant improvement of the life at breaking load and LCF properties of the cast.

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关键词

nanoparticles,nanopowder,improvement,chromium alloys,heat-resistant k403 alloys,molybdenum alloys,refractory compounds,modifying agents,aluminium alloys,crystal microstructure,grain size,structural properties,fatigue,heat-resistant k4169 alloys,iron alloys,cast low cycle fatigue properties,nickel alloys,properties,carbide structure,mechanical properties,powder mixtures,nanodispersion,titanium alloys,tungsten alloys,size 10 mm to 20 mum,cobalt alloys,size 40 mum to 60 mum,refractories,nanopowders,mixing,grain structure,niobium alloys,heat-resistant alloys

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