کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9802934 1516026 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
HIP after sintering of ultrafine WC-Co hardmetals
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
HIP after sintering of ultrafine WC-Co hardmetals
چکیده انگلیسی
This paper analyses the changes induced by HIP after sintering on the microstructure and mechanical properties of WC-7wt.%Co ultrafine hardmetal grade. The well known correlation between porosity reduction and fracture strength improvement is confirmed in these compositions, this being more effective at HIP temperatures above the eutectic point of the alloy. In absence of GGI, hardness decreases continuously as the HIP temperature increases. However, for specimens containing VC and Cr3C2 additions, hardness increases as the HIP temperature increases from 1200 °C to 1400 °C. This anomalous trend, confirmed by WC grain size observations, could be related to the activation of coalescence mechanisms during solid state HIPing, which are inhibited by the presence of a liquid phase.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refractory Metals and Hard Materials - Volume 23, Issue 3, May 2005, Pages 193-198
نویسندگان
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