不同镦拔方式对TC4钛合金棒材组织均匀性的影响

Effect of Upsetting and Drawing Mode on Structure Homogenetity of TC4 Titanium Alloy Bars

采用不同的镦粗比、不同的坯料截面形状,制定出了三种不同的镦拔工艺,并研究三种不同镦拔工艺对TC4钛合金棒材显微组织的影响。结果表明,TC4钛合金经三种镦拔工艺锻造后,均获得典型两相区组织,但方案C组织细小、1/4R处和心部组织差异小、无方向性。

In this paper, three upsetting and drawing processes were formulated with different forging ratios and stock cross section shapes, and the effect of upsettng and drawing process on structure homogenetity of the TC4 alloy bars was investigated. The result showed that two-phase region structure was obtained after forging of TC4 alloy with three upsetting and drawing processes, but the structure of TC4 manufactured by scheme No.4 was fine; the structure difference at 1/4R and in the center was not obvious and the structure had no orientation.