热处理工艺对SP-700钛合金组织性能的影响

来源期刊:中国有色金属学报2010年第z1期(下册)

论文作者:张钢 张丰收

文章页码:664 - 669

关键词:SP-700钛合金;固溶处理;时效处理;次生α相

Key words:SP-700 titanium alloy; solution treatment; aging treatment; secondary α phase

摘    要:为了提高国产SP-700钛合金的性能,对SP-700钛合金热处理的工艺进行研究。采用不同固溶温度、时效温度以及时效时间的处理方法,分析热处理工艺对该钛合金组织和性能的影响。研究结果表明:钛合金强度随着固溶温度的升高而提高,其原因是次生α相的析出量增加;控制时效温度和时效时间,可以控制次生α相的形状和尺寸,从而能获得强度和塑性的最佳匹配;于850 ℃进行固溶处理并采用水冷,然后,在510 ℃或550 ℃时效可使SP-700钛合金获得较好的强度-塑性匹配。

Abstract: The heat treatment of SP-700 titanium alloy was studied to improve the property of homemade SP-700 titanium alloy. By using different solutions and aging temperatures as well as aging time, the effects of heat treatment process on microstructure and properties of SP-700 titanium alloy were systematically studied. The results show that the alloy strength increases with solid solution temperature due to the fact that the number of secondary α increases. To control aging temperature and aging time can control the shape and size secondary α, to obtain the optimum combination of strength with plasticity. Solution treating at 850 ℃, cooling to room temperature by water, and then aging at 510 ℃ or 550 ℃ will help the alloy to obtain the optimum combination of strength with plasticity.

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