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SISTEMA INTEGRAL DE INFORMACIÓN ACADÉMICA - PÚBLICO
Título del libro: 8th Pacific Rim International Congress On Advanced Materials And Processing 2013, Pricm 8 Título del capítulo: Recrystallisation of cold rolled CuMgSn alloys produced from thin cast slabs
Alloying elements; Casting; Cold rolling; Cooling; Dispersions; Grain growth; High strength alloys; High strength steel; Metal cladding; Recrystallization (metallurgy); Solidification; Adhesive wears; High cooling rates; Inter-metallic particle; Interdendritic eutectics; Particle dispersion; Recrystallisation; Technical difficulties; Tribological compatibilities; Alloy steel
Resumen:
CuMgSn alloys are investigated as a high-strength substitute for CuPb alloys in journal bearings, based on the tribological compatibility of Mg with steel. While the incorporation of Mg into a copper alloy presents considerable technical difficulties, it was found that its effect on hardness is extraordinary; there are good indications that Mg reduces the tendency for adhesive wear. Higher amounts of alloying elements, as well as slower cooling rates during solidification increase the presence of a brittle interdendritic eutectic, forbidding cold-working. Below 2 wt% of Sn and Mg and using high cooling rates, the slabs can be cold-rolled up to 80% reduction. Isothermal recrystallisation treatments at 600°C provoke highly heterogeneous intermediate microstructures, with some zones fully recrystallised and others showing a cold-rolled structure. Dispersed intermetallic particles separating zones with different kinetics prevent excessive grain growth, allowing the subsequent recrystallisation of slower grains, mitigating the heterogeneity of the final product.
Entidades citadas de la UNAM:
Fuente:
ISBN: 9781632660008 Editorial: John Wiley and Sons Inc.
