کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
615262 | 1454847 | 2013 | 14 صفحه PDF | دانلود رایگان |
HIP-consolidation (Hot Isostatic Pressing or HIPing) of cobalt-based Stellite alloys offers significant technological advantages for components operating in aggressive wear environments. The aim of this investigation was to ascertain the effect of re-HIPing on the HIPed alloy properties for Stellite 4, 6 and 20 alloys. Structure–property relationships are discussed on the basis of microstructural and tribo-mechanical evaluations. Re-HIPing results in coarsening of carbides and solid solution strengthening of the matrix. The average indentation modulus improved, as did the average hardness at micro- and nano-scales. Re-HIPing showed improvement in wear properties the extent of which was dependent on alloy composition.
► Re-HIPing of Stellite alloys result in solid solution strengthening of matrix.
► Re-HIPing also results in precipitate coarsening of carbides.
► Abrasive wear improves after re-HIPing of Stellite 4 (8.4%) and 6 (7.3%) alloys.
► Sliding wear improves after re-HIPing of Stellite 20 (32%) alloy.
► Hardness increases at micro- and nano-scales after re-HIPing.
Journal: Tribology International - Volume 57, January 2013, Pages 8–21