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型砂和涂料在浇注温度下生成一些低熔物,能促使耐火基料烧结并粘着在铸件表面上.但粘砂层可区分为难剥离粘砂层和易剥离粘砂层两种,生成氧化物隔离层、光亮碳;碳隔离层和珐琅态烧结层时,铸件冷却之际会自动剥落下来.因此,研制涂料配方要依循“一要烧结、二要剥离”的烧结剥离型涂料的原则.本文还扼要讨论了促使涂料层烧结和剥离的各项措施,以及强化烧注气氛工艺”.
Molding sand and coatings generate some low melt at pouring temperature that can cause the refractory base to sinter and adhere to the casting surface, but the sticky sand layer can be distinguished as being hard to peel off the sticky sand layer and peelable sticky sand layer, resulting in oxide isolation Layer, bright carbon; carbon isolation layer and enamel state sintered layer, the casting will automatically peel off on cooling .Therefore, the development of paint formula to follow the “one to be sintered, two to be stripped,” the principle of sintering peel-type coating.This article also briefly Discussed the various measures to promote the sintering and peeling paint layer, as well as to strengthen the process of burning atmosphere.