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鍛造工藝對(duì)Ti40阻燃鈦合金微觀組織與力學(xué)性能的影響
發(fā)布人：上海艾荔艾金屬材料有限公司bt990.com.cn
更新時(shí)間：2015-09-13
采用3種工藝鍛造出Ti40阻燃鈦合金90 mm方棒，對(duì)棒材的微觀組織及力學(xué)性能進(jìn)行研究。
鍛造工藝對(duì)Ti40阻燃鈦合金微觀組織與力學(xué)性能的影響Effect of forging process on microstructures and mechanical properties of Ti40 burn resistant titanium alloy
采用3種工藝鍛造出Ti40阻燃鈦合金90 mm方棒，對(duì)棒材的微觀組織及力學(xué)性能進(jìn)行研究，結(jié)果表明：減少鍛造火次、增加單火的變形量可以有效細(xì)化Ti40合金棒材的晶粒尺寸、提高組織均勻性，即使原始組織晶粒度不夠均勻，也能夠得到有效的改善。采用多火次小變形量鍛造易造成Ti40合金棒材微觀組織粗化和不均勻。Ti40合金棒材的拉伸強(qiáng)度和塑性對(duì)β晶粒尺寸變化不敏感，蠕變性能隨晶粒尺寸增大略有提高，用于鍛件成形的Ti40合金坯料應(yīng)該進(jìn)行充分鍛造，以避免因小變形量校正變形產(chǎn)生粗大和不均勻的組織。
90 mm tetragonal bars were made by forging Ti40 burn resistant titanium alloy through three different forging processes. The microstructures and mechanical properties of these forged bars were studied. The results show that it is a effective way to uniform and refine the beta grain size of Ti40 alloy bars through large deformation processing, even if the primary microstructures are not uniform. Multiple forging with small deformation can easily make the beta grain size of Ti40 alloy bars coarser and nonuniform. Tensile properties of Ti40 alloy bars are not very sensitive to the beta grain size. Creep properties slightly improve with the increase of beta grain size. To avoid coarse and nonuniform microstructures, forging blanks should be well performed before the final forging due to the small deformation modification.
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