退火对(Mo_(1-x)Nb_x)_5Si_3高温合金组织与力学性能的影响  

Effect of Annealing on Microstructure and Mechanical Properties of (Mo_(1-x)Nb_x)_5Si_3 Superalloy

作　　者：杨喜龙[1] 

机构地区：[1]天华化工机械及自动化研究设计院,甘肃兰州730060

出　　处：《热加工工艺》2013年第2期169-171,175,共4页Hot Working Technology

摘　　要：采用电弧熔炼结合高温退火技术制备(Mo1-xNbx)5Si3(其中,x=0.0,0.2,0.4,0.6,0.8,1.0)系高温合金,研究了退火处理对其组织和性能的影响。结果表明:退火使合金组织趋于均匀化,Mo的加入使Nb5Si3合金的组织由α型向β型转变;退火前后试样的硬度均呈先增高后降低的抛物线规律,退火后试样的硬度高于退火前的硬度;断裂韧性呈先降低后升高的规律;断口主要以脆性断裂为主。The effects of annealing process on the microstructure and mechanical properties of （M01-xNbx）Si3 （x=0.0, 0.2, 0.4, 0.6, 0.8, 1.0） superalloy made by arc melting technique were investigated. The results indicate that annealing process makes the phase of the Superalloy more even. With the increase of Mo amount, the crystal type of NbsSi3 changes from ct to 13, the hardness of superalloy increases after annealing, and at first the fracture toughness of the superalloy increases and then decreases, the main fracture is brittle fracture.

关 键 词：MO5SI3 高温合金 显微结构 力学性能 

分 类 号：TG156.21[金属学及工艺—热处理]