本文選題：冷卻槽 + ZA鎂合金��； 參考：《材料導(dǎo)報(bào)》2017年12期

【摘要】：采用自孕育法制備新型的ZA92鎂合金,研究了冷卻槽對(duì)組織的細(xì)化作用,并對(duì)其機(jī)理進(jìn)行了分析。結(jié)果表明:合金熔體內(nèi)部的形核與冷卻槽的激冷作用、熔體的流動(dòng)速度及剪切力的大小有關(guān),合適的冷卻槽角度有利于晶粒的游離和增殖。熔體在流經(jīng)冷卻槽的過程中,其組織變化趨勢(shì)為:粗大枝晶→細(xì)小枝晶→等軸晶→薔薇狀晶和近球狀晶。冷卻槽角度較大或較小均不利于組織的細(xì)化,當(dāng)冷卻槽角度在30~45°之間時(shí),坯料組織的晶粒分布比較集中且細(xì)小,其平均晶粒尺寸在47.5~51.4μm之間。
[Abstract]:A new type of ZA92 magnesium alloy was prepared by self-inoculation method. The effect of cooling tank on microstructure was studied and its mechanism was analyzed. The results show that the nucleation of the alloy melt is related to the cooling of the cooling trough, the velocity of melt flow and the size of the shear force, and the proper angle of the cooling trough is conducive to the dissociation and proliferation of the grain. In the process of flowing through the cooling tank, the microstructure of the melt changes as follows: coarse dendrite, fine dendrite, equiaxed crystal, rose crystal and near globular crystal. When the cooling tank angle is between 30 擄and 45 擄, the grain distribution of the billet is concentrated and fine, and the average grain size is between 47.5 渭 m and 51.4 渭 m.
【作者單位】： 西安工業(yè)大學(xué)材料與化工學(xué)院;商洛學(xué)院陜西省尾礦資源綜合利用重點(diǎn)實(shí)驗(yàn)室;蘭州理工大學(xué)省部共建有色金屬先進(jìn)加工與再利用國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(51464031) 陜西省教育廳專項(xiàng)科研計(jì)劃資助項(xiàng)目(16JK1241) 商洛市科技計(jì)劃項(xiàng)目(SK2015-29)
【分類號(hào)】：TG292
，

本文編號(hào)：1993487