引言钛及钛合金具有良好的机械性能,尤其是其强度与比重的比率大,对大多数气态和液态介质的耐腐蚀性,因此多年来它们几乎应用在所有的技术领域中。现在已能生产成本较适中的铸件了,而这些材料至今为止几乎是独一无二地作为半成品来加工的——为此常常要消耗很多资金和时间。 INTRODUCTION Titanium and titanium alloys have good mechanical properties, especially their large ratio of strength to specific gravity and their resistance to most gaseous and liquid media, so they have been used in almost all technical fields for many years. It is now possible to produce castings that are more cost-effective, and these materials have so far been almost exclusively machined as semi-finished products - often costing much money and time.