軌道交通車輛大型材用7005鋁合金的熱處理特性
發(fā)布人：上海艾荔艾金屬材料有限公司www.bt990.com.cn
更新時(shí)間：2015-12-21
利用力學(xué)性能測(cè)量和透射電鏡觀察等手段對(duì)軌道交通車輛大型材用7005 鋁合金熱處理特性進(jìn)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(xué)性能測(cè)量和透射電鏡觀察等手段對(duì)軌道交通車輛大型材用7005 鋁合金熱處理特性進(jìn)行研究。結(jié)果表明：該合金在線擠壓淬火后于105 ℃時(shí)效時(shí)，隨著時(shí)效的進(jìn)行，開(kāi)始階段硬度上升很快，時(shí)效8 h后，硬度(HB)達(dá)100 HB；時(shí)效50 h后，硬度(HB)可達(dá)125 HB以上；此后隨著時(shí)效時(shí)間的延長(zhǎng)硬度上升緩慢，時(shí)效200 h后，硬度仍未達(dá)到峰值;經(jīng)(105 ℃，8 h)+(155 ℃，8 h)雙級(jí)時(shí)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(jí)時(shí)效及雙級(jí)時(shí)效時(shí)間過(guò)長(zhǎng)，均引起析出相粒子明顯長(zhǎng)大、粗化，導(dǎo)致合金強(qiáng)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.
作為值得信賴的合作伙伴和高品質(zhì)金屬合金的半成品供應(yīng)商，艾荔艾擁有完善的服務(wù)體系和專業(yè)的團(tuán)隊(duì)。在同客戶交易的過(guò)程中，我們力求根據(jù)不同的應(yīng)用需求將我們的產(chǎn)品做到精益求精。針對(duì)當(dāng)前和未來(lái)的市場(chǎng)需求，艾荔艾致力于為客戶提供最佳的金屬材料解決方案。
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.
獲取更多我們供應(yīng)的合金和服務(wù)信息，請(qǐng)致電086-021-67660801或發(fā)電子郵件[email protected]聯(lián)系我們，您也可以通過(guò)微博和微信和我們互動(dòng)。
For more information on the alloys and services that we supply,?call us?at 086-021-67660801 or email us at [email protected]. You can also get in touch on social media, we are constantly active on?Weibo?and?Weixin.