新聞資訊
軌道交通車輛大型材用7005鋁合金的熱處理特性
發布人：上海艾荔艾金屬材料有限公司www.jshcn.cn
更新時間：2015-12-21
利用力學性能測量和透射電鏡觀察等手段對軌道交通車輛大型材用7005 鋁合金熱處理特性進行研究。
軌道交通車輛大型材用7005鋁合金的熱處理特性Heat treatment characteristic of?7005 Al alloy employed in railway trains
利用力學性能測量和透射電鏡觀察等手段對軌道交通車輛大型材用7005 鋁合金熱處理特性進行研究。結果表明：該合金在線擠壓淬火后于105 ℃時效時，隨著時效的進行，開始階段硬度上升很快，時效8 h后，硬度(HB)達100 HB；時效50 h后，硬度(HB)可達125 HB以上；此后隨著時效時間的延長硬度上升緩慢，時效200 h后，硬度仍未達到峰值;經(105 ℃，8 h)+(155 ℃，8 h)雙級時效后，σb=395 MPa，σ0.2=330 MPa，δ=12%，硬度為117 HB。合金在較高溫度(155 ℃和180 ℃)單級時效及雙級時效時間過長，均引起析出相粒子明顯長大、粗化，導致合金強度降低。
The heat treatment characteristic of the 7005 aluminum alloys was studied by mechanical properties measurement and TEM. The results show that, during the process of aging? at 105 ℃ after on-line quenching, the hardness(HB) of alloy increases quickly at first and reach about 100 HB after aging for 8h and 125 HB after 50 h, then the hardness increases slowly with increasing aging time, and the hardness does not reach the peak value even the alloy is aged for 200 h. After aging at (105 ℃, 8 h)+(155 ℃, 8 h), the mechanical properties of 7005 aluminum alloy are σb=395 MPa, σ0.2=330 MPa, δ=12%, 117 HB. If the aging of alloy at high temperature (155 ℃, 180 ℃) or the two-stage aging is too long, the precipitated phases of the alloy will grow and coarsen, and then the alloy strength decreases.
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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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