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一、前言镁及其合金是一种极易氧化的金属,特别是在熔融状态下更易氧化燃烧,为了减少烧损,安全生产和保证金属内部纯洁度,在整个熔铸过程中需要用气体或熔剂加以保护。目前变形镁合金铸锭的生产是用粉状的二号熔剂作熔体表面的复盖保护。二号熔剂加10％(或15％)氟化钙制成粉状或块状作为镁合金熔体的精炼熔剂。铸造时用二氧化硫气体保护。二号熔剂主要成分为氯盐。氯盐熔剂的采用除对熔体起保护作用防止氧化燃烧外,还兼有精炼除渣、除气的作用。然
First, the preface Magnesium and its alloys is a highly oxidizable metal, especially in the molten state more easily oxidized combustion, in order to reduce burning, safe production and ensure the purity of the internal metal, the entire casting process requires the use of gas or flux To protect. The current deformation of magnesium alloy ingot production is the use of powder No. 2 flux melt cover for the protection of the surface. No.2 flux plus 10% (or 15%) calcium fluoride powder or lumps as refined flux of magnesium alloy melt. Sulfur dioxide gas protection when casting. The main component of the second flux chloride salt. Chloride salt flux in addition to the role of the protection of the melt to prevent oxidation and combustion, but also both refining slag removal, the role of gas. Of course