The invention discloses a hard shell casting process, which involves the technical field of the foundry industry. The process is as follows: using the EPS material to carry out the mold assembly; using a specific repair material to repair the surface of the EPS; apply a specially made coating, and then dry at 20 degrees Celsius at 70 degrees C, and repeat the drying process for many times; the drying process will be repeated many times; the drying process will be repeated; The dryness model is put into the modified furnace to melt EPS at 200 degrees centigrade at 900 degrees C; the shell is cooled into the sand box after the shell is formed, and the steel liquid is melted through the vibrating table, the steel liquid is smelted, the negative pressure device is connected, the negative pressure is cast in the casting of 0.02 0.08, and the casting system can be removed after the heat preservation, cooling, opening and recovering the sand. The blow mold of the special EPS material is adopted, which saves the destruction of the mold cavity. The weight of the EPS is used as a model, so the weight is lighter. No more gas, combustion, free carbon damage and pollution caused by EPS contact steel lead to the waste of steel liquid.
【技术实现步骤摘要】
一种强硬型壳铸造工艺
:本专利技术涉及一种强硬型壳铸造工艺,属于铸造行业
技术介绍
:目前现有的铸造工艺包含砂型铸造工艺、精密铸造生产工艺和消失模铸造工艺,这些铸造工艺均存在以下缺陷:砂型铸造工艺为传统铸造工艺劳动环境差,排污量大,铸件产品容易出现气孔夹渣砂眼等铸造常见缺陷;精密铸造生产100Kg以上铸件产品困难成品率低;消失模铸造工艺增碳,残渣一直无法做低碳钢和合金钢。
技术实现思路
:针对上述问题,本专利技术要解决的技术问题是提供一种强硬型壳铸造工艺。本专利技术的强硬型壳铸造工艺为:步骤一、采用EPS原料进行吹模组装;步骤二、采用特定的修复材料修复EPS的表面;步骤三、涂挂特制的涂浆,然后在20℃-70℃下进行干燥处理,干燥处理过程重复多次;步骤四、将干燥的模型放入改装的炉中经200℃-900℃将EPS融出;步骤五、型壳形成后冷却埋入沙箱,经振实台振实,熔炼钢液,接通负压装置,负压控制在0.02-0.08进行浇铸;步骤六、保温、冷却、开箱、回收沙后去除浇冒系统即可。作为优选,所述的步骤三中的涂浆由以下质量份原料组成:硅溶胶18%-48%,糊精0.2%-4%,硫酸盐0.2%-12%,三氧化二铬0.1%-0.8%,木质纤维素0.1%-2%,纤维类0.1%-0.5%,熟铝矾土0.1%-4%,320高铝矾土50%-85%,石英粉5%-35%,糖浆0.1%-0.4%,膨润土0.1%-0.4%,消泡剂0.01%-0.2%,防腐剂0.1%-0.2%。进一步优选,所述的步骤三中的涂浆由以下质量分数原料组成:硅溶胶20%,糊精4%,硫酸盐5%,三氧化二铬0.5%, ...
【技术保护点】
1.一种强硬型壳铸造工艺,其特征在于:所述的强硬型壳铸造工艺为:步骤一、采用EPS原料进行吹模组装;步骤二、采用特定的修复材料修复EPS的表面;步骤三、涂挂特制的涂浆,然后在20℃‑70℃下进行干燥处理,干燥处理过程重复多次;步骤四、将干燥的模型放入改装的炉中经200℃‑900℃将EPS融出;步骤五、型壳形成后冷却埋入沙箱,经振实台振实,熔炼钢液,接通负压装置,负压控制在0.02‑0.08进行浇铸;步骤六、保温、冷却、开箱、回收沙后去除浇冒系统即可。
【技术特征摘要】
1.一种强硬型壳铸造工艺,其特征在于:所述的强硬型壳铸造工艺为:步骤一、采用EPS原料进行吹模组装;步骤二、采用特定的修复材料修复EPS的表面;步骤三、涂挂特制的涂浆,然后在20℃-70℃下进行干燥处理,干燥处理过程重复多次;步骤四、将干燥的模型放入改装的炉中经200℃-900℃将EPS融出;步骤五、型壳形成后冷却埋入沙箱,经振实台振实,熔炼钢液,接通负压装置,负压控制在0.02-0.08进行浇铸;步骤六、保温、冷却、开箱、回收沙后去除浇冒系统即可。2.按照权利要求1所述的一种强硬型壳铸造工艺,其特征在于:所述的步骤三中的涂浆由以下质量份原料组成:硅溶胶18%-48%,糊精0.2%-4%...
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