摘要
同时对照密度ｄ和比饱和磁化强度４πσ的测定值以精确确定ＷＣ－Ｃｏ硬质合金试样的相区（成分）位置，并根据各相区合金的相含量和γ相成分同合金的ｄ和４的关系：ＷＣ＋γ两相区──Xγ=(15600/d-1).[0.791-1.791(xw+xc)-1]-1xco=(1-Xw-Xc).Xγ,Xc=0.0613+(Xc-0.0613).(15600/d-1)/[0.791-1079(Xw+Xc)];WC+γ+η1三相区──Xγ=6.402.10-4.4πσ,Xη1=223200/d-5.002.10-3.4πσ,Xco=53278/d-6.412.10-4.4πσ-3.416,Xc=0.7064+1.878.10-4.4πσ-10062/d;WC+γ+石墨三相──Xγ=50545.10-4.4πσ,XG=2630/d-6.056.10-5.4πσ-0.1686,Xco=5.101.10-4.4πσ,Xc=2469/d-8.89.10-5.4πσ-０．０９７４，能精确地无损测定ＷＣ－Ｃｏ硬质合金材料的相组成及碳含量和钻含量，测定精度（相对误差）达１％，进行了实验验证。
The effect of toughening mechanism on the microstructure and fracture properties in the aging process ofalloy 2090+Ce was investigated. Alloy aged at 150 ℃has higher toughness than that aged at 163℃ due tohigher toughening effect within laminated grains in former crafts. Along with crack growth, plastic deformationbecomes weaker in the main fracture suface, While delamination in short transverse direction increases,indicating that delamination toughening coincidentally plays a more active role in toughening mechanism. Themodel of fracture in laminated materials is developed and calculations show that delamination can enhanceKc value up to 40% without other improved conditions.
出处
《有色金属》
CSCD
1999年第2期63-66,共4页
Nonferrous Metals
基金
天津市自然科学基金
关键词
硬质合金
相组成
无损测定
成分
组成
alloy 2090+Ce, fracture toughness, delamination toughening, mathematical analysis
