论文部分内容阅读
本文采用液-液掺杂的方式,将单一稀土或复合稀土的硝酸盐掺入钼酸铵溶液中得到掺杂钼酸铵,然后通过粉末冶金的方法制得钼合金坯条,再经过旋锻、拉拔得到掺杂钼合金丝材样品。采用拉伸试验机、金相显微镜等测试手段研究了镧、钇和镧钇复合稀土掺杂对钼坯条及钼丝材性能的影响规律。研究结果表明,稀土掺杂可显著提高钼合金丝的高温强度和弯折性能,相比于单一稀土元素掺杂,镧钇复合掺杂可获得更好的高温力学性能。镧钇复合掺杂钼合金再结晶组织呈现等轴晶和锁状燕尾搭接晶的混合组织。
In this paper, liquid-liquid doping method, a single rare earth or rare earth nitrate mixed ammonium molybdate solution was doped with ammonium molybdate, and then obtained by powder metallurgy molybdenum alloy billets, and then after swirling , Drawing a sample of doped molybdenum alloy wire. The effects of lanthanum, yttrium and lanthanum yttrium composite rare earth doping on the properties of molybdenum billet and molybdenum wire were studied by means of tensile testing machine and metallographic microscope. The results show that rare earth doping can significantly improve the high temperature strength and bending properties of molybdenum alloy wire. Compared with single rare earth element doping, lanthanum yttrium composite doping can obtain better high temperature mechanical properties. The recrystallization structure of lanthanum yttrium composite doped molybdenum alloy presents the mixed structure of equiaxed and dovetail lap.