论文部分内容阅读
以混合 Ti、Al、Mo 元素粉末为原料制备新型 Ti-6Al-yMo (3≤y≤11)合金,并研究了合金沉积层的显微组织及硬度。结果发现:随着 Mo 含量的增加,合金沉积层的初生α束域体积分数逐渐减小,同时 Ti-6Al-yMo 合金的组织逐渐由魏氏组织转变为网篮组织形态,初生α相的尺寸和长宽比均随着 Mo 含量的增加而减小,次生α相的体积分数随着 Mo 含量的增加而增大。对激光多层沉积 Ti-6Al-yMo 合金的显微硬度进行了测试,结果发现:在所采用的合金成分范围内,Mo 含量小于 11%时,随着 Mo 含量的增加,激光多层沉积 Ti-6Al-yMo 合金沉积态的硬度几乎呈线性增加。
A novel Ti-6Al-yMo (3≤y≤11) alloy was prepared by mixing Ti, Al and Mo powders and the microstructure and hardness of the alloy deposit were studied. The results showed that with the increase of Mo content, the volume fraction of primary α-beam in the deposited layer gradually decreased and the microstructure of Ti-6Al-yMo alloy gradually changed from Widmanstatten to baskets. The size of the primary α-phase And aspect ratio all decrease with the increase of Mo content. The volume fraction of secondary α phase increases with the increase of Mo content. The results of laser micro-deposition of Ti-6Al-yMo alloy show that: when the content of Mo is less than 11%, with the increase of Mo content, Ti The hardness of -6Al-yMo alloy deposited almost linearly.