热等静压温度对K424合金构件组织性能的影响  

Eff ect of Hot Isostatic Pressing Temperature on Microstructure and Properties of K424 Alloy Component

作　　者：苏捷 杨经雨 黄岚[1] 喻石亚 易出山 刘锋[1] Su Jie;Yang Jingyu;Huang Lan;Yu Shiya;Yi Chushan;Liu Feng(Central South University National Key Laboratory of Powder Metallurgy,Hu'nan,410083;AECC South Industry Company Limited,Hu'nan,412002)

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南410083 [2]中国航发南方工业有限公司,湖南412002

出　　处：《当代化工研究》2024年第16期27-29,共3页Modern Chemical Research

基　　金：湖南省十大技术攻关“航空发动机异形构件精密铸造技术”(项目编号:2022GK1050)。

摘　　要：K424合金具有较高的高温强度及塑性,但高Ti、Al含量易造成疏松缺陷的形成,影响材料力学性能。本文采用热等静压工艺处理铸造K424合金,研究了热等静压温度对K424内部缺陷及组织演化的影响,分析了在高温条件下K424合金疏松闭合影响因素,结果表明:1200℃/140 MPa/2 h热等静压可高效消除内部疏松,主要归因于材料在该温度下强度降低及元素扩散能力加强;由于1200℃/140 MPa/2 h热等静压后合金内部缺陷消除,γ′相含量增加、尺寸增大,材料室温力学性能提高。K424 alloy has high temperature strength and plasticity,but the high Ti and Al elements are easy to cause the formation of de-fects,which affects the mechanical properties.In this paper,K424 alloy is treated by hot isostatic pressing(HIP).The influence of HIP temperature on internal defects and microstructure evolution of K424 was studied.The internal defects can be effectively eliminated by HIP at 1200℃/140 MPa/2 h,which is due to the reduction of the strength of the material at this temperature and the enhancement of the element diffusion ability.After 1200℃/140 MPa/2 h HIP,the internal defects of the alloy are eliminated,the content and size ofγ′phase are increased,and the mechanical properties of the material at room temperature are improved.

关 键 词：K424 高温合金 热等静压 疏松 力学性能 

分 类 号：TG132.32[一般工业技术—材料科学与工程]