固溶時效工藝對Ti-6Al-6V-2Sn鈦合金棒材組織及性能的影響

固溶時效工藝對Ti-6Al-6V-2Sn鈦合金棒材組織及性能的影響Influences of solution and aging treatment process on microstructure and mechanical properties of Ti-6Al-6V-2Sn titanium alloy rods

對Ti-6Al-6V-2Sn鈦合金棒材進行鍛造、固溶及時效處理，利用光學顯微鏡、XRD、SEM 及力學性能試驗對該合金不同固溶、時效工藝下的顯微組織和力學性能進行研究。結果表明：Ti-6Al-6V-2Sn鈦合金鍛棒的組織為初生等軸α+β轉變組織，合金經固溶處理后的組織為初生αp相、馬氏體α′、α″相和亞穩β相，強度有所降低，斷面收縮率有所上升，說明固溶處理有一定的軟化作用，但隨著固溶溫度升高，強度增加，塑性下降；經固溶處理后的棒材在時效處理過程中，亞穩態組織析出細小彌散的次生αs相，使合金強度明顯強化，塑性略有降低，且隨著時效溫度的升高，強化效果下降，塑性隨之提高。經過綜合比較，并考慮強塑性的最佳匹配，可以確定本實驗中Ti-6Al-6V-2Sn合金固溶時效熱處理的優化工藝為(880 ℃, 1 h, WQ)+(580 ℃, 4 h, AC)。

The influences of solution and aging treatment process on microstructure and properties of Ti-6Al-6V-2Sn alloy rods were investigated by using optical microscope (OM), XRD, scanning electron microscopy (SEM) and mechanical properties test. The results show that the as-forged microstructures of Ti-6Al-6V-2Sn alloy rods are fine isothermal primary α and transition β phases. After solution treatment, the microstructure is mainly composed of isothermal primary αp, martensite α′, α″ and metastable β phases. The strength decreases, but the reduction of area increases, which indicates that the solution treatment has a softening effect. With the rise of solution temperature, the strength increases subsequently, and the plasticity decreases. And fine dispersion secondary αs phase precipitates from the metastable structures after aging treatment process, the alloy can be strengthened significantly with slightly reduced plasticity. And with the aging temperature increases, the strengthening effect is reduced, and the plasticity increases. Through comprehensive comparison, considering the best match of the strength and plasticity, it can determined that the optimization solution and aging treatment process of Ti-6Al-6V-2Sn alloy in this experiment is (880 ℃, 1 h, WQ)+ (580 ℃, 4 h, AC).

全文下載：https://pan.baidu.com/s/1_ho-EtZi5aLcChYwieBfXg?

作為值得信賴的合作伙伴和高品質金屬合金的半成品供應商，通項公司擁有完善的服務體系和專業的團隊。在同客戶交易的過程中，我們力求根據不同的應用需求將我們的產品做到精益求精。針對當前和未來的市場需求，通項公司致力于為客戶提供最佳的金屬材料解決方案。

TXCO has been a reliable partner and supplier of sophisticated and high-quality semi-finished products maed of alloys. In dialogue with our customers, we optimise our products to meet the specific application requirements. TXCO develops the best alloy material solutions for current and future challenges.

獲取更多我們供應的產品和服務信息，請致電086-021-6786 0205或發電子郵件service@sinoav.com聯系我們，您也可以通過微信，微博，領英，臉書，推特和谷歌+與我們互動。

For more information on the products and services that we supply, call us at 086-021-6786 0205 or email us at service@sinoav.com. You can also get in touch on social media, we are constantly active on Weixin, Weibo, LinkedIn, Facebook, Twitter and Google+.