热处理对Ti-25V-15Cr-2Al-2Mo-0.2C合金组织稳定性的影响  

Effect of Heat Treatment on Microstructural Stability of Ti-25V-15Cr-2Al-2Mo-0.2C Alloy

作　　者：雷力明[1] 黄旭[1] 孙福生[1] 王宝[1] 赵红霞[1] 曹春晓[1] 

机构地区：[1]北京航空材料研究院,北京100095

出　　处：《稀有金属》2003年第4期503-506,共4页Chinese Journal of Rare Metals

基　　金：英国Rolls Royce公司资助项目 ( 2 0 0 0~ 2 0 0 2 )

摘　　要：研究了热处理对Ti 2 5V 15Cr 2Al 2Mo 0 .2C阻燃β钛合金组织稳定性的影响。结果表明 ,高温固溶并直接时效处理导致合金 β基体上析出较多的α相沉淀 ,尤其在随后的热暴露组织中形成了恶化合金塑性的连续晶界α膜。然而 ,若在时效前再进行一次低温固溶处理则可明显减少α相的析出数量 ,合金的热稳定性因此而得到显著改善。The effect of heat treatment on the microstructural stability of non burning β titanium alloy Ti 25V 15Cr 2Al 2Mo 0 2C (%) was investigated. The results show that direct aging after a solution treatment at high temperature leads to a higher level of α precipitates, especially in the subsequent exposure microstructure a continuous grain boundary α film is formed, which is detrimental to the ductility of the alloy. However, the number of α precipitates will significantly decrease if a solution treatment at lower temperature is performed again before the aging-thus the thermal stability of the alloy is markedly improved.

关 键 词：金属材料 阻燃钛合金 Ti-25V-15Cr-2A1-2Mo-0.2C 热处理 微观组织 组织稳定性 

分 类 号：TG146.23[一般工业技术—材料科学与工程]