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熱處理對Ti44Al6Nb0.6B合金組織及力學性能的影響
發布人：上海艾荔艾金屬材料有限公司www.jshcn.cn
更新時間：2015-09-11
通過改變熱處理溫度，研究熱處理工藝對Ti44Al6Nb0.6B合金宏觀組織、顯微組織及力學性能的影響。
熱處理對Ti44Al6Nb0.6B合金組織及力學性能的影響Influence of heat treatment on microstructure and mechanical properties of Ti44Al6Nb0.6B alloy
通過改變熱處理溫度，研究熱處理工藝對Ti44Al6Nb0.6B合金宏觀組織、顯微組織及力學性能的影響。結果表明：隨著熱處理溫度的升高，Ti44Al6Nb0.6B合金的宏觀組織晶粒尺寸不斷增大，1 330 ℃時合金的組織為大量的粗大等軸晶；1 200 ℃和1 270 ℃熱處理后，Ti44Al6Nb0.6B合金的顯微組織均為全片層組織，1 330℃熱處理后，合金具有明顯的近全片層組織。顯微硬度測試表明這3種熱處理均降低了顯微硬度值，但隨著溫度的升高，顯微硬度有所提高，這可能是由于固溶強化引起的。
The influence of heat treatment on the macro/micro-structure and mechanical properties of Ti44Al6Nb0.6B alloy at different temperatures was studied. The results show that the grain size increases with the increase of the temperature. There are lots of coarse equiaxed grains in the sample when the heat treatment temperature is 1 330 ℃. The microstructure of Ti44Al6Nb0.6B alloy is changed into full lamella structure when it is heat treated at 1 200 ℃ and 1 270 ℃. However, the microstructure changes to near full lamella structure when the temperature is 1 330 ℃. Micro-hardness testing shows that all of the heat treatments decrease the hardness, but the hardness increases with the increase of temperature, which maybe resulted from solution strengthening.
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