GH625高温合金热加工影响因素的模拟研究  

Simulation Research of Influence Factors of Hot Working in GH625 Alloy

作　　者：曹宇[1] 王超[1] 章清泉[1] CAO Yu;WANG Chao;ZHANG Qingquan(Beijing Beiye Functional Materials Corporation, B eijing 100192)

机构地区：[1]北京北冶功能材料有限公司,北京100192

出　　处：《金属材料研究》2018年第1期29-38,共10页Research on Metallic Materials

摘　　要：GH625高温合金是固溶强化镍基高温合金，具有良好的力学性能以及耐腐蚀性能，但其热加工难度较大。为充分了解初始条件变化对GH625高温合金钢锭热加工过程的影响规律，本文利用有限元方法，设置不同初始条件对GH625高温合金钢锭进行了锻造模拟。通过模拟得到了比较符合实际的结果，确定以下规律：GH625高温合金钢锭在锻造过程中，随变形速率增加，应变向表面集中：单次变形量增加，可以提高钢锭温度；初始温度降低，应变向芯部转移；钢锭各部位应力状态对断裂因子的影响远大于初始条件的改变。GH625 alloy is a solid solution strengthening nickel-base superalloy, which have the great mechanical properties and outstanding corrosion resistance, but it is hard to hot working. In order to study the influence of the initial conditions on the process of GH625 alloy hot working, we use the FEM to simulate the forging process of the GH625 alloy. The simulation results are in accordance with the practice and the following rules are determined： In the forging process of GH625 alloy, the strain is concentrated on the surface with strain rate increases; the temperature of the ingot will more increases with single strain increases; the strain in the core of the ingot increases at lower forging temperature; the effect of different stresses in different parts of ingot on damage factor are more than the change of initial conditions.

关 键 词：GH625高温合金 锻造 有限元模拟 

分 类 号：TG146.15[一般工业技术—材料科学与工程]