Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Silicon carbide crucible for aluminum alloy smelting and preparation method thereof
The invention relates to a silicon carbide crucible for aluminum alloy smelting and a preparation method thereof. According to the technical scheme, silicon carbide particles A, silicon carbide particles B, silicon carbide fine powder A, silicon carbide fine powder B and xylitol are mixed, soaked in silica sol, dried and subjected to heat treatment; the silicon dioxide coated silicon carbide obtained through heat treatment is mixed with aluminum oxide micro powder, vanadium pentoxide and deionized water, mixed slurry is obtained, a binder, a sintering aid, polyacrylamide and Arabic gum are added, mixing and ball milling are conducted, and silicon carbide slurry is obtained. And placing the exhausted silicon carbide slurry into a plaster mold for preparing the crucible, standing, pouring out the redundant silicon carbide slurry, continuously standing, taking out a silicon carbide blank after standing, carrying out indoor curing, drying, and carrying out heat treatment at 1300-1500 DEG C to obtain the silicon carbide crucible for aluminum alloy smelting. The prepared silicon carbide green body is not prone to cracking, and the prepared product is low in sintering temperature, high in compression strength, high in thermal shock stability and high in aluminum alloy melt erosion resistance.
本发明涉及一种铝合金熔炼用碳化硅坩埚及其制备方法。其技术方案是：将碳化硅颗粒A、碳化硅颗粒B、碳化硅细粉A、碳化硅细粉B和木糖醇混合，于硅溶胶中浸渍，烘干，热处理；将热处理得到的二氧化硅包覆碳化硅与氧化铝微粉、五氧化二钒和去离子水混合，得混合浆料，外加粘结剂、助烧剂、聚丙烯酰胺和阿拉伯树胶，混合，球磨，得碳化硅浆料。将排气后的碳化硅浆料置入制备坩埚的石膏模具中，静置，倒出多余碳化硅浆料，继续静置，取出静置后的碳化硅坯体，室内养护，干燥，于1300～1500℃热处理，得到铝合金熔炼用碳化硅坩埚。本发明制备的碳化硅坯体不易破裂，所制制品烧结温度低、耐压强度大、热震稳定性高、抗铝合金熔体侵蚀能力强。
Silicon carbide crucible for aluminum alloy smelting and preparation method thereof
The invention relates to a silicon carbide crucible for aluminum alloy smelting and a preparation method thereof. According to the technical scheme, silicon carbide particles A, silicon carbide particles B, silicon carbide fine powder A, silicon carbide fine powder B and xylitol are mixed, soaked in silica sol, dried and subjected to heat treatment; the silicon dioxide coated silicon carbide obtained through heat treatment is mixed with aluminum oxide micro powder, vanadium pentoxide and deionized water, mixed slurry is obtained, a binder, a sintering aid, polyacrylamide and Arabic gum are added, mixing and ball milling are conducted, and silicon carbide slurry is obtained. And placing the exhausted silicon carbide slurry into a plaster mold for preparing the crucible, standing, pouring out the redundant silicon carbide slurry, continuously standing, taking out a silicon carbide blank after standing, carrying out indoor curing, drying, and carrying out heat treatment at 1300-1500 DEG C to obtain the silicon carbide crucible for aluminum alloy smelting. The prepared silicon carbide green body is not prone to cracking, and the prepared product is low in sintering temperature, high in compression strength, high in thermal shock stability and high in aluminum alloy melt erosion resistance.
本发明涉及一种铝合金熔炼用碳化硅坩埚及其制备方法。其技术方案是：将碳化硅颗粒A、碳化硅颗粒B、碳化硅细粉A、碳化硅细粉B和木糖醇混合，于硅溶胶中浸渍，烘干，热处理；将热处理得到的二氧化硅包覆碳化硅与氧化铝微粉、五氧化二钒和去离子水混合，得混合浆料，外加粘结剂、助烧剂、聚丙烯酰胺和阿拉伯树胶，混合，球磨，得碳化硅浆料。将排气后的碳化硅浆料置入制备坩埚的石膏模具中，静置，倒出多余碳化硅浆料，继续静置，取出静置后的碳化硅坯体，室内养护，干燥，于1300～1500℃热处理，得到铝合金熔炼用碳化硅坩埚。本发明制备的碳化硅坯体不易破裂，所制制品烧结温度低、耐压强度大、热震稳定性高、抗铝合金熔体侵蚀能力强。
Silicon carbide crucible for aluminum alloy smelting and preparation method thereof
一种铝合金熔炼用碳化硅坩埚及其制备方法
LIU HAO (Autor:in) / LIU WENYUAN (Autor:in) / WANG ZHOUFU (Autor:in) / GU JIANMING (Autor:in) / MA YAN (Autor:in) / WANG XITANG (Autor:in)
23.08.2024
Patent
Elektronische Ressource
Chinesisch
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