GH2787合金叶片锻件的晶粒演变规律研究  

Study on Grain Evolution Law of GH2787 Alloy Blade Forgings

作　　者：李向辉 陈由红 LI Xianghui;CHEN Youhong(AECC Aero Science and Technology Co.,Ltd.,Chengdu 610500,China;AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China)

机构地区：[1]中国航发航空科技股份有限公司,四川成都610500 [2]中国航发北京航空材料研究院,北京100095

出　　处：《热加工工艺》2022年第11期22-26,共5页Hot Working Technology

摘　　要：用Gleeble-1500热模拟试验机模拟研究了GH2787合金叶片锻件在不同加热温度、应变速率下的晶粒演变规律。结果表明:合金晶粒尺寸随加热温度的变化符合唯象理论的Sellars模型;应变速率和变形温度对合金组织的均匀性影响显著,变形量急剧过渡区、应变速率和锻造温度匹配不当都会造成合金动态再结晶不充分,未再结晶的晶粒在热处理时急剧长大,形成单个(或局部)大晶粒,破坏晶粒尺寸的均匀性。The Gleeble-1500 thermal simulation testing machine was used to simulate and study the grain evolution law of GH2787 alloy blade forgings under different heating temperatures and strain rates. The results show that the change of alloy grain size with heating temperature accords with the Sellars model of phenomenological theory;the strain rate and deformation temperature have significant influence on the uniformity of alloy structure, the sharp transition zone of deformation, improper matching of strain rate and forging temperature will all cause insufficient dynamic recrystallization of the alloy, and the unrecrystallized grains grow up sharply during heat treatment, forming single(or local) large grains, which will destroy the uniformity of grains.

关 键 词：GH2787合金 热模拟试验 晶粒尺寸 

分 类 号：TG316[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]