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利用光学显微镜研究了置氢处理后Ti-6Al-4V合金的微观组织,通过X射线衍射分析试验研究了置氢处理过程中的相转变过程;采用室温压缩试验研究了置氢处理后Ti-6Al-4V合金的变形行为,并进行了冷镦试验。结果表明,氢促进了α″马氏体与亚稳β相的形成,亚稳β相的形成与转变是Ti-6Al-4V合金变形性能提高的主要因素;在氢含量为0.60%～0.90%时,与原始合金相比,峰值应力降低60MPa,压缩极限提高40%以上;氢含量为0.80%时,通过冷镦成型制备了直径为 10mm的Ti-6Al-4V合金90°沉头螺钉。
The microstructure of Ti-6Al-4V alloy after hydrogen treatment was investigated by optical microscope. The phase transformation during the hydrogen treatment was studied by X-ray diffraction analysis. The effect of Ti-6Al- -4V alloy deformation behavior, and the cold heading test. The results show that hydrogen promotes the formation of α "martensite and metastable β phase. The formation and transformation of metastable β phase is the main factor for the improvement of the deformation properties of Ti-6Al-4V alloy. With hydrogen content of 0.60% -0.90% , Compared with the original alloy, the peak stress decreases by 60MPa and the compression limit increases by 40%. When the hydrogen content is 0.80%, the Ti-6Al-4V alloy 90 ° countersunk head screw with the diameter of 10mm was prepared by cold heading.