【摘要】 介绍了降低钛合金超塑成形(SPF)温度的三种主要方法,即通过添加氢、细化晶粒、在β相中加入具有高扩散系数的元素均可有效地降低SPF温度,从而利于提高超塑成形的效率及节省能源和降低模具的损耗。同时还介绍了细晶超塑性的变形机理和氢对超塑性的作用机理。最后指出大塑性变形技术和氢处理技术是制备细晶组织钛合金的简单而可行的工艺方法。更多还原

【Abstract】 In order to improve the efficiency,save energy and decrease the die wear during superplastic forming,superplastic forming temperature should be decresed.Three main methods of reducing the temperature were reviewed: adding hydrogen into Ti matrix,obtaining fine-grained microstructure and adding elements with high diffusion coefficient into β phase,respectively.Deformation mechanism for fine-grained superplasticity and influencing mechanism of hydrogen on superplasticity were also presented.The severe plastic forming technique and the hydrogen penetrating technique are the simple and practicable processing method to manufacture fine-grained microstructures of titanium alloy.更多还原