TA15鈦合金的相變、組織與拉伸性能
發布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時間：2016-01-17
研究TA15合金在4個典型溫度1 020、1 000、900、800 ℃以及水淬、空冷和爐冷3種冷卻方式下的相變、組織與性能的關系。
TA15鈦合金的相變、組織與拉伸性能Phase transformation, microstructures and tensile properties of TA15 titanium alloy研究TA15合金在4個典型溫度1 020、1 000、900、800 ℃以及水淬、空冷和爐冷3種冷卻方式下的相變、組織與性能的關系。結果表明：隨著冷卻速度的降低，1 020 ℃熱處理合金的顯微組織由馬氏體α′相向針狀(α+β)相和片狀(α+β)相轉變，970 ℃及900 ℃熱處理后則由初生α+馬氏體α′相向初生α+針狀(α+β)和等軸α+晶界β演變，800 ℃熱處理后只有α和β兩相組織；在1 020~900 ℃熱處理后，TA15合金的室溫和高溫強度隨冷卻速度降低有明顯下降，冷卻速度相同時，強度隨溫度升高而提高，而在800 ℃熱處理后的強度和塑性與冷卻方式無關。
The relationship between phase transformation, microstructures and tensile properties of TA15 titanium alloy at four typical heat treatment temperatures 1 020, 970, 900 and 800 ℃ in water quenching, air cooling and furnace cooling conditions was studied. The results show that the microstructure transforms from martensite α′ to acicular (α+β) to chiplike (α+β) after heat-treatment at 1 020 ℃, from primary α + martensite α′ to primary α + acicular (α+β) to equiaxed α+β on the grain boundaries at 970 ℃ and 900 ℃, and is α and β dual phases only at 800 ℃, when decreasing the cooling rate. The room and high temperature tensile properties of TA15 titanium alloy decrease obviously with the decrease of cooling rate, and increase with the increase of temperature under the same cooling rate, when the heat treatment temperature is from 1 020 ℃ to 900 ℃. The correlation between the tensile properties and cooling method is not obvious at 800 ℃.
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