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本文研究了两种热加工工艺对BTi-6431S高温钛合金厚板显微组织和力学性能的影响。试验结果表明,(α+β)轧制的厚板组织类型为类似于等轴的两相区加工组织,β轧制的该合金厚板的显微组织为典型的细片状魏氏组织,该组织厚板的室温和高温强度明显高于α+β轧制厚板,塑性稍低。综合分析表明:该合金厚板650℃具有较高的高温瞬时强度,可用于宇航工业650℃短时用结构件的制作。
In this paper, the effects of two hot working processes on the microstructure and mechanical properties of BTi-6431S high temperature titanium alloy plate were studied. The experimental results show that the (α + β) rolled slab microstructure is similar to the equiaxed two-phase machined microstructure, and the β microstructure of the β-rolled slab is a typical flaky Widmanstatten microstructure. The slab at room temperature and high temperature strength was significantly higher than α + β rolled plate, plasticity slightly lower. Comprehensive analysis shows that: the alloy plate 650 ℃ high instantaneous strength, can be used for aerospace industry 650 ℃ short-term use of structural components.