提出了一种新的细化α+β型钛合金显微组织的氢处理工艺:在合金的氢化β转变点以下0—40K的温度范围对合金渗氢处理,空冷至室温,最后在948K真空除氢。Ti-6Al-4V和Ti-5Al-2.5Fe合金经此工艺处理后,组织显著细化,屈服强度,拉伸强度及延伸率分别提高8—15％,5—13％,7—14％。
A process by using hydrogen as a temporary alloying element to refine the microstructrue of α+β type Ti alloys was newly developed. It involves hydrogenating the alloy at 0—40K below the hydrogenated β transition temperature, air cooling to room temperature and dehydrogenating at 948K. Ti-6Al-4V and Ti-SAl-2.5Fe alloys treated by the process show much refined microstructures, and the yield strength, ultimate strength and elongation increase by 8—15, 5—13 and 7—14% respectively.
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