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用铸渗法解决熔模铸钢件表面脱碳,其实质是在型壳的内表层中(即第一、二层涂料中)加入含磷物质,当高温钢水浇入后,碳便向钢水中溶解、扩散,以达到消除脱碳层,并可获得一定厚度增碳层之目的。此项工艺的关键在于含碳物质必须具有很高的热稳定性,在900℃下焙烧,含碳物质不挥发,不气化。试验中我们选择了电弧炉炼钢的石墨电极头(其熔点高达4020±50°K),粉碎并筛分成180～200目石墨粉,掺入涂料中。表层涂料
Cast infiltration method to solve the surface of the cast steel casting decarburization, its essence is in the inner shell of the shell (ie, the first and second coating) by adding phosphorus-containing material, when poured into high-temperature molten steel, carbon steel to the steel Dissolved in water, diffusion, in order to achieve elimination of decarburization, and can get a certain thickness of the purpose of carbon layer. The key to this process is that the carbonaceous material must have a high thermal stability, calcined at 900 ° C, the carbonaceous material is not volatile and is not gasified. In the experiment, we selected the graphite electrode tip of EAF steelmaking (the melting point is up to 4020 ± 50 ° K), crushed and sieved into 180-200 mesh graphite powder, and mixed into the coating material. Surface coating