将二次真空自耗熔炼的Ti-55钛合金铸锭轧制成1.2 mm厚的薄板,研究Ti-55钛合金超塑性板材的显微组织与力学性能.结果表明,显微组织均匀,晶粒极细的Ti-55钛合金超塑性板材,具有良好的室温拉伸性能和超塑性能.超塑性拉伸试验表明,在一定的变形温度范围(880~920 ℃)与变形速率(1.4×10-3 s-1)下,Ti-55钛合金板材超塑性伸长率可达到700%以上.
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