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一、科学管理和使用 新型无毒型砂具有的防燃特性,主要是铸造镁合金的特性要求的。从熔炼到浇注,熔融的镁液在有氧和水蒸汽存在的情况下,其表面极易氧化燃烧。新型的铸镁无毒型砂,既要有较好的工艺性能,还必须满足各种复杂的镁合金铸件,在不同的浇注温度条件下的防燃性能。但在使用新的无毒型砂过程中,往往因忽略某些生产环节,常引起镁铸件报废。结合推广过程中遇到的一些问题。建议生产上采取以下相应的措施。
First, the scientific management and use of new non-toxic sand has the flame retardant properties, mainly cast magnesium alloy characteristics required. From smelting to pouring, the molten magnesium is oxidized and burned very easily in the presence of oxygen and water vapor. The new type of non-toxic cast magnesium sand, both have good process performance, but also must meet a variety of complex magnesium alloy castings, in different pouring temperature conditions, the flame retardant properties. However, in the use of new non-toxic sand process, often overlooked because of some of the production processes, often causing magnesium castings scrapped. Combined with some problems encountered in the promotion process. It is recommended to take the following measures in production.