Laves相NbCr_2合金粉末包套锻造的数值模拟  

Numerical Simulation of Laves Phase NbCr_2 Alloy Powder Cladding Forging

作　　者：万鹏[1] 王克鲁[1] 李鑫[1] WAN Peng;WANG Kelu;LI Xin(School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学航空制造工程学院,江西南昌330063

出　　处：《热加工工艺》2019年第1期121-124,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(51164030);江西省研究生创新基金资助项目(YC2017-S325)

摘　　要：对Laves相NbCr_2合金粉末包套锻造过程进行了数值模拟,研究了其在锻造温度800～1200℃内的应力、应变及密度的变化规律,并分析了不同温度对它们的影响。结果表明,锻件的等效应力在整个镦粗过程中分布的不均匀,始锻温度对Laves相NbCr_2合金中间部位的应力影响更加明显;锻件的应变分布有明显变化,增大始锻温度可以使Laves相NbCr_2合金坯料的变形均匀性提高;锻件能够较好地完成致密化过程,锻造结束时平均相对密度,接近于1,始锻温度上升有利于密度的分布更加均匀。The cladding forging process of Laves phase NbCr2 alloy powder was numerically simulated. The variation of stress, strain and density in the forging temperature of 800-1200 ℃ was studied, and the influences of different temperatures on them were analyzed. The results show that the equivalent stress of the forging is not uniform during the whole upsetting process, and the effect of the initial forging temperature on the stress in the middle part of the Laves phase NbCr2 alloy is more obvious. The strain distribution of forgings varies obviously, and the deformation uniformity of Laves phase NbCr2 alloy billets can be improved by increasing the initial forging temperature. The average relative density at the end of forging is close to 1.The increase of the initial forging temperature is beneficial to the distribution of density.

关 键 词：Laves相NbCr2合金 包套锻造 数值模拟 密度 

分 类 号：TG301[金属学及工艺—金属压力加工] TG146.4[一般工业技术—材料科学与工程]