钼铼合金带材的组织和性能  

Structure and Properties of Molybdenum-Rhenium Alloys

作　　者：谭栓斌[1] 张小明[1] 任吉文[1] 郭让民[1] 张廷杰[1] 李中奎[1] 

机构地区：[1]西北有色金属研究院难熔所,陕西西安710016

出　　处：《稀有金属》2004年第1期127-130,共4页Chinese Journal of Rare Metals

摘　　要：选用熔炼的钼铼合金经过锻造、热拉、冷拉和轧制的方法制备钼铼合金带材 ,其规格为 0 .3mm宽 0 .0 3mm厚 ,对其组织和性能进行了研究。结果表明 :加工态的拉断力是再结晶状态的 2 .5倍左右 ,为 2 4.8N ;而延伸率只是再结晶状态的 1/3 ,为 3 .1%;随着退火温度的提高 ,钼铼合金的的拉断力直线降低 ,但延伸率在 172 3K ,3 0min退火后却最高 ,金相结果表明 172 3K退火的钼铼合金带材发生了明显的再结晶。钼铼合金加工态拉伸时其断口表现为准解理断裂 ,退火后断口表现为明显的韧窝状。铼元素加入钼中 ,可以提高晶粒和晶粒之间的结合力 ,使得钼铼合金在拉伸下有很好的延伸率。同时钼铼合金在室温变形时 ,也容易发生孪晶变形 。The structure and mechanical properties of tapes (0.03 mm×0.3 mm) for MoRe alloys produced by forging, drawing and rolling were investigated. The results show that the force of tapes after deforming attains to 24.8 N, that is 2.5 times stronger than that of recrystallized one. Otherwise, the elongation after deforming is 3.1% that is 1/3 of that for recrystallized. With increasing of the annealing temperature the force linearly decreases and the elongation annealing at 1723 K 30 min is the largest. The recrystalliztion temperature is 1723 K through the analysis of the structure. The fracture mode after deforming is quasi cleavage and is ductile rupture after annealing at 1723 K. The elongation of MoRe alloys is perfect because the adhering force among grains increases and the twin occurs after deforming.

关 键 词：钼铼合金 加工 力学性能 

分 类 号：TG146.4[一般工业技术—材料科学与工程]