A dispersion-hardened high-hard elastic alloy is developed by adding 3%/ of aluminium (Al) to the nickel-chromium alloy. The experimental results show that after a progressive aging of the alloy at 550℃ or 5 h, sup...A dispersion-hardened high-hard elastic alloy is developed by adding 3%/ of aluminium (Al) to the nickel-chromium alloy. The experimental results show that after a progressive aging of the alloy at 550℃ or 5 h, supersaturated Cr(α)-rich phase (80 wt% Cr)formed. The Cr content of this phase is by 40 wt% higher than that in as-prepared alloy. An analysis of quantitative metallography shows that the seperated Cr(α)-rich phase grains have an average size(D) of 1.8225 mm and the total area of the particles is 16. 7% of the measured area (Pa = 16.7%). The large amount of dispersively distributed supersaturated Cr(α)-rich phase which are seperated out during progressive aging process strengthen the alloy matrix, and raise the hardness and bending strength of the alloy.展开更多
文摘A dispersion-hardened high-hard elastic alloy is developed by adding 3%/ of aluminium (Al) to the nickel-chromium alloy. The experimental results show that after a progressive aging of the alloy at 550℃ or 5 h, supersaturated Cr(α)-rich phase (80 wt% Cr)formed. The Cr content of this phase is by 40 wt% higher than that in as-prepared alloy. An analysis of quantitative metallography shows that the seperated Cr(α)-rich phase grains have an average size(D) of 1.8225 mm and the total area of the particles is 16. 7% of the measured area (Pa = 16.7%). The large amount of dispersively distributed supersaturated Cr(α)-rich phase which are seperated out during progressive aging process strengthen the alloy matrix, and raise the hardness and bending strength of the alloy.
