溫變形對(duì)汽車車身用6061鋁合金自然時(shí)效及力學(xué)性能的影響
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：2016-01-29
以汽車車身用6061-T4鋁合金為研究對(duì)象，利用顯微硬度測(cè)試、拉伸試驗(yàn)和透射電子顯微鏡(TEM)，研究溫變形對(duì)汽車車身用6061鋁合金自然時(shí)效及烤漆硬化的影響。
溫變形對(duì)汽車車身用6061鋁合金自然時(shí)效及力學(xué)性能的影響Effect of warm deformation on natural ageing andmechanical property of aluminum alloy6061 sheets for automotive body?以汽車車身用6061-T4鋁合金為研究對(duì)象，利用顯微硬度測(cè)試、拉伸試驗(yàn)和透射電子顯微鏡(TEM)，研究溫變形對(duì)汽車車身用6061鋁合金自然時(shí)效及烤漆硬化的影響。結(jié)果表明：溫變形后的6061鋁合金不會(huì)發(fā)生明顯的自然時(shí)效效應(yīng)，放置8 d的自然時(shí)效過程中硬度值保持穩(wěn)定；對(duì)溫變形樣品分別立即和停放8 d后，實(shí)施模擬烤漆(180 ℃人工時(shí)效30 min)溫變形后立即進(jìn)行烤漆，其硬化能力與放置8 d后再進(jìn)行烤漆樣品的無(wú)明顯差異。合金烤漆后的硬度與溫變形溫度有關(guān)，在160~230 ℃范圍內(nèi)，隨著溫變形溫度上升，硬度上升；而經(jīng)250 ℃拉伸后，烤漆硬度出現(xiàn)下降， 230 ℃為最適宜溫度，此條件下成形后的6061鋁合金經(jīng)烤漆過程后，硬度最高值可達(dá)到114HV。
The effects of warm deformation on natural ageing and mechanical property of aluminum alloy 6061 for automotive body were investigated by microhardness test, tensile test and TEM. The results show that no obvious natural aging effect is found in the warm deformed samples, and the hardness maintains stable during the 8 d natural ageing after warm deformation. Simulated baking process, i.e., artificial ageing at 180 ℃ for 30 min, is conducted to the warm deformed samples immediately and after a delay of 8 d, respectively, and no obvious mechanical property difference is found between the two groups of samples. The hardness of the samples is deformation temperature dependent, i.e., it increases with the increasing of warm deformation temperature within the range of 160-230 ℃, but further increasing of deformation temperature to 250 ℃ leads to the decrease of final hardness. 230 ℃ is the optimum warm deformation temperature, and the final hardness of the samples deformed at this temperature increases to 114HV.
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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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