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HIP处理对TiAl基合金排气门组织和性能的影响 被引量：4

Effects of HIP Treatment on Microstructure and Properties of TiAl-based Alloy Exhausted Valve
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摘要 利用感应凝壳熔炼方法,在预热的金属型中离心浇注了名义成分为Ti48Al2Cr2Nb的CA4GE型发动机用排气门。将排气门经1270℃在173MPa保温4h热等静压(HIP)处理后,其组织结构为双态组织,γ相在边界附近,尺寸较小,分布较为均匀,力学性能在815℃时σb达到470MPa,比铸态(370MPa)提高了100MPa,伸长率明显提高,达到10%以上。 Ti-48Al-2Cr-2Nb exhaust valves for CA4GE engine have been manufactured by centrifugally pouring the molten melt into preheated permanent mold in induction skull melting furnace.After HIP with 173 MPa at 1 270 ℃ for 4 hours,the microstructure is composed of double-phase structure,where γ phase with smaller size is uniformly distributed into near boundary.Tensile strength reaches 470 MPa at 815 ℃,increased by 100 MPa comparing with 370 MPa for as-cast structure,and elongation is increased by more than 10%.
作者 盛文斌
机构地区 山东理工大学
出处 《特种铸造及有色合金》 CAS CSCD 北大核心 2006年第4期245-247,共3页 Special Casting & Nonferrous Alloys
关键词 热等静压 排气门 金属型 TIAL基合金 HIP,Exhausted Valve,Permanent Mold,TiAl Based Alloy
分类号 TG113 [金属学及工艺—物理冶金]
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参考文献9

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二级参考文献3

共引文献13

同被引文献27

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特种铸造及有色合金
2006年 第4期

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