不同變形量TA15鈦合金的熱處理行為
發(fā)布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時(shí)間：2016-01-19
研究了TA15鈦合金變形量大的d20 mm小棒材及變形量小的大鍛件的熱處理行為。結(jié)果表明：在750~920 ℃范圍內(nèi)，隨著退火溫度的升高，大鍛件拉伸強(qiáng)度升高約100 MPa，小棒材拉伸強(qiáng)度先降后升，且升幅遠(yuǎn)小于大鍛件的；920 ℃以上退火，二者強(qiáng)度都出現(xiàn)降低。隨著退火溫度的升高，小棒材中再結(jié)晶軟化率先發(fā)揮作用，使拉伸強(qiáng)度降低；而830 ℃以上退火，β轉(zhuǎn)變組織中次生α二次析出起到強(qiáng)化作用，二者抗拉強(qiáng)度均出現(xiàn)升高，但小棒材由于再結(jié)晶溫度低，再結(jié)晶軟化削弱了析出強(qiáng)化的作用。
不同變形量TA15鈦合金的熱處理行為Heat treatment behavior of TA15 titanium alloy with?different deformation degrees研究了TA15鈦合金變形量大的d20 mm小棒材及變形量小的大鍛件的熱處理行為。結(jié)果表明：在750~920 ℃范圍內(nèi)，隨著退火溫度的升高，大鍛件拉伸強(qiáng)度升高約100 MPa，小棒材拉伸強(qiáng)度先降后升，且升幅遠(yuǎn)小于大鍛件的；920 ℃以上退火，二者強(qiáng)度都出現(xiàn)降低。隨著退火溫度的升高，小棒材中再結(jié)晶軟化率先發(fā)揮作用，使拉伸強(qiáng)度降低；而830 ℃以上退火，β轉(zhuǎn)變組織中次生α二次析出起到強(qiáng)化作用，二者抗拉強(qiáng)度均出現(xiàn)升高，但小棒材由于再結(jié)晶溫度低，再結(jié)晶軟化削弱了析出強(qiáng)化的作用。
The heat treatment behavior of TA15 titanium alloys with different deformation degrees was studied with d20 mm bar and large forging as the representatives for large deformation and small deformation, respectively. The results show that tensile strength increment can be obtained to be 100 MPa for large forging. The tensile strength decreases and then increases for the bar, and the increment is far less than that of large forging when annealed at 750?920 ℃. Both tensile strengths decrease when annealed at temperature higher than 920 ℃. The decrease of the tensile strength for the bar is caused by the recrystallization softening effect with increasing the annealing temperature. The strengthening effect for the little bar and large forging is caused by the secondary phase precipitation from the transformed β above 830 ℃. The precipitation strengthening effect on the little bar is smaller than that of the large forging because of the recrystallization softening effect.
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AILIAI 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. AILIAI develops the best alloy material solutions for current and future challenges.
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