本文選題：環(huán)保砂 + 綠色鑄造　； 參考：《熱加工工藝》2017年21期

【摘要】：云溪環(huán)保砂用于砂型鑄造,得到的鑄件質(zhì)量好、精度高,同時(shí)具有環(huán)保無污染的優(yōu)勢。通過向云溪環(huán)保砂添加少量添加劑,研究環(huán)保砂的抗壓強(qiáng)度、殘留強(qiáng)度以及高溫?zé)嵝阅堋＝Y(jié)果表明,當(dāng)有機(jī)酯加入量恒定時(shí),隨水玻璃加入量的增加,環(huán)保砂的抗壓強(qiáng)度和殘留強(qiáng)度提高。在滿足造型強(qiáng)度要求及型砂的殘留強(qiáng)度不能太高的情況下,加入0.30 wt%的有機(jī)酯,2.5 wt%的水玻璃較為合適。加入適量添加劑的環(huán)保砂的熱膨脹率明顯降低,在高溫階段產(chǎn)生適度燒結(jié);小于1000℃,其熱壓強(qiáng)度升高且大于普通環(huán)保砂和煤粉砂;大于1100℃,熱壓強(qiáng)度降低,低于普通環(huán)保砂和煤粉砂。這些特性有利于在長時(shí)間澆注時(shí)具有較好的退讓性,保證鑄件精度,防止鑄件變形,使鑄件的熱裂傾向減小。
[Abstract]:Yunxi environmental protection sand is used in sand mold casting, the casting quality is good, the precision is high, and it has the advantage of environmental protection and no pollution. The compressive strength, residual strength and high temperature thermal properties of environmental friendly sand were studied by adding a small amount of additives to Yunxi environmental protection sand. The results show that the compressive strength and residual strength of environmental friendly sand increase with the increase of sodium silicate content when the organic ester content is constant. When the molding strength is satisfied and the residual strength of molding sand is not too high, it is more suitable to add 0.30 wt% organic ester and 2.5 wt% water glass. The thermal expansion rate of the environmentally friendly sand added with proper amount of additive is obviously reduced, and the moderate sintering occurs at high temperature. When the temperature is less than 1000 鈩，

本文編號：2000441