摘要
利用离心铸造的方法,浇注了目标成分为Ti-48Al-2Cr-2Nb(at.%)的合金,并对其进行热等静压(HIP)处理(1270℃/173MPa/4h),研究了TiAl基合金在快速冷却条件下的晶粒尺寸变化和片层间距变化规律,以及HIP工艺对其析出相尺寸的影响。研究结果表明,TiAl基合金试样横截面边缘区域的晶粒尺寸最小,而最大尺寸晶粒出现在过渡区域内;片层间距和HIP过程中析出相在截面内的尺寸变化符合抛物线规律。
In this paper, samples with target component Ti-48Al-2Cr-2Nb （at.%） were cast in permanent mold by the centrifugal casting method and Hot Isostatic Pressed （HIP） at 1270℃/ 173 MPa/4 h. The variation of lamellar space, grain size, as well as the effect of HIP on precipitation of γ-phase were investigated in detail. Results showed that the minimum grains existed near the boundary and the maximum ones appeared in medial region in selected cross-section of TiAl-base alloy, and the size variations of lamellar space and γ-phase were parabolic.
出处
《铸造》
EI
CAS
CSCD
北大核心
2007年第4期349-352,共4页
Foundry
基金
山东理工大学科研基金项目(4040-304019)
