摘要
钼合金用于制造黑色金属液锻模具的主要技术难点之一是在大气中发生迅速失重的高温灾难性氧化。本实验测定了1200℃以下未作表面保护处理和经表面渗硅-离子渗氮复合处理的国产商业粉末冶金钼合金的氧化失重曲线,并进行了循环温度为20℃~1150℃,循环周期为15s的冷热疲劳试验。结果表明,在铝合金表面形成的Mo-Si-N复合保护层极大地提高了钼合金的高温抗氧化能力,并具有硬度高、致密性好、与基体结合牢固和能承受剧烈冷热疲劳的优良特性。
When a die is made of molybdenum alloy and is used for ferrous metals liquid stamping,one of the key difficulties is that there occurs weight loss rapidly of the die because of oxidizatiOn at high temperature. In this paper,oxidization-weight loss curves of domestic commercial molybdenum al1oy made of powder metallurgy were determined, and thermal fatigue tests were carried out with temperature cycle from 2OC to l15oC and time cycle being l5 seconds. The experiment results show that the surface protecting layer formed by combined treatment of siliconizing and ionitriding has high hardness and good binding ability and excellent characteristics in the oxidization resistance and thermal fatigue test
出处
《金属热处理》
CAS
CSCD
北大核心
1994年第10期10-13,共4页
Heat Treatment of Metals
关键词
钼合金
渗硅
离子渗氮
疲劳试验
molybdenum alloy,oxidization,surface protecting layer,thermal fatigue test