镍铬钼合金的粉末冶金热压和烧结  

Study on Ni-Cr-Mo Alloys Prepared by Powder Metallurgy with Hot Pressing and Sintering

作　　者：刘如铁[1] 李溪滨[1] 熊拥军[1] 赵福安[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《金属热处理》2005年第10期60-63,共4页Heat Treatment of Metals

摘　　要：采用粉末冶金热压(HP)、烧结工艺制备镍铬钼合金。用金相观察、物相分析和扫描电镜分析了该合金的金相组织,测试了其力学性能。结果表明,热压合金经烧结后力学性能大幅提高,烧结温度为1300℃时,综合力学性能达到最佳;继续升至1330℃,由于脆性高铬相的大量析出,合金的塑性和强度下降,硬度上升。The Ni-Cr-Mo alloys were prepared by powder metallurgy with hot pressing and sintering and their microstructures and mechanical properties were studied by OM, XRD and SEM. The results show that the mechanical peroperties of the alloys after hot press and sintering improve significantly. The best comprehensive performance of the alloy was obtained by sintering at 1300℃. The elongation and tensile strength decrease and hardness increase of the alloys with the increase of the sintering temperature to 1330℃ due to the precipitation for a lot of brittle high chromium phase.

关 键 词：热压 烧结 Ni-Cr-Mo合金 力学性能 

分 类 号：TG133.4[一般工业技术—材料科学与工程]