【摘要】：采用鎂砂粉和剛玉粉作為耐火骨料制備了一種燒結(jié)型鑄型涂料,實(shí)驗(yàn)研究了兩種骨料的適宜配比,分析了骨料組元比例對(duì)燒結(jié)過(guò)程的影響;優(yōu)化設(shè)計(jì)了一種以鎂砂粉和剛玉粉為復(fù)合耐火骨料的鑄型涂料配比,檢測(cè)了涂料的性能。結(jié)果表明:復(fù)合骨料燒結(jié)后的涂層產(chǎn)生了鎂鋁尖晶石(Mg Al_2O_4),當(dāng)鎂砂粉和剛玉粉混合質(zhì)量為7∶3時(shí),涂層中的Al_2O_3全部參與燒結(jié)反應(yīng);硅溶膠(SiO_2·n H_2O)的加入可以改善涂層的高溫強(qiáng)度,防止出現(xiàn)暴熱裂紋;優(yōu)化后的涂料具有較好的綜合性能,能有效地防止不銹鋼鑄件表面出現(xiàn)粘砂現(xiàn)象。
[Abstract]:A sintered mold coating was prepared by using magnesia and corundum powder as refractory aggregate. The optimum ratio of two kinds of aggregate was studied experimentally and the effect of the ratio of aggregate component on the sintering process was analyzed. A kind of casting coating with magnesia powder and corundum powder as composite refractory aggregate was designed and the properties of the coating were tested. The results show that the magnesia-alumina spinel (MgAl2O4) is produced after the composite aggregate is sintered. When the mixture mass of magnesia and corundum powder is 7:3, all AlStat _ 2O _ 3 in the coating take part in the sintering reaction, and the high temperature strength of the coating can be improved by adding silica sol (Sio _ 2n H _ 2O). The optimized coating has good comprehensive properties and can effectively prevent the appearance of sand on the surface of stainless steel castings.
【作者單位】： 沈陽(yáng)工業(yè)大學(xué)材料科學(xué)與工程學(xué)院;
【基金】：沈陽(yáng)市工業(yè)攻關(guān)計(jì)劃項(xiàng)目(F12-008-2-00)
【分類號(hào)】：TG221

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