本文選題：鋁合金活塞　切入點(diǎn)：鍛壓工藝　出處：《湖南大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年06期

【摘要】：提出了采用噴射沉積高硅鋁合金碳化硅梯度增強(qiáng)復(fù)合材料,進(jìn)行墩擠鍛壓制備汽車發(fā)動(dòng)機(jī)活塞的方法,設(shè)計(jì)了該方法所用的活塞鍛壓模具,并研究了變形速率、始鍛溫度、坯料保溫時(shí)間等工藝參數(shù)對(duì)梯度增強(qiáng)高硅鋁合金活塞鍛件組織及力學(xué)性能的影響.結(jié)果表明:所提出的方法可以制備出碳化硅梯度分布的鋁合金活塞,活塞壁部外表面沿裙部末端至環(huán)槽區(qū)碳化硅分布為3.7%~13.6%;且最佳的鍛壓工藝參數(shù)為:變形速率為0.05s~(-1),始鍛溫度為465℃,坯料保溫時(shí)間為2h.活塞取樣并經(jīng)固溶+時(shí)效熱處理后,其性能指標(biāo)為抗拉強(qiáng)度達(dá)382MPa,延伸率為6.0%.
[Abstract]:In this paper, a method of preparing automobile engine piston by extrusion forging with silicon carbide gradient reinforced composite material of high silicon aluminum alloy by spray deposition is presented. The piston forging die used in this method is designed, and the deformation rate, starting forging temperature and deformation rate are studied. The effect of heat preservation time on the microstructure and mechanical properties of gradient-reinforced high-silicon aluminum alloy piston forgings is studied. The results show that the aluminum alloy piston with gradient distribution of silicon carbide can be prepared by the proposed method. The distribution of sic from the end of the skirt to the ring groove is 3.713.6.The optimum forging process parameters are as follows: the deformation rate is 0.05s / L, the initial forging temperature is 465 鈩，

本文編號(hào)：1668291