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众所周知,用水冷铁模浇铸的纯铝铸锭能够进行余热压延。我厂10年的生产实践证明,LF 2合金铸锭进行余热压延也完全可行。LF 2合金属于热处理不强化防锈铝合金,力学性能介于纯铝和硬铝之间,铸锭在热加工前不需要均匀化退火。我厂在容量为1吨的可旋转式轻柴油反射炉中熔炼LF 2合金,不加钛细化晶粒。以前用氯化铵精炼两次,每次用量2千克;现在改用无毒精炼剂精炼两次,每次用量仍为2千克。浇注温度700～730℃,用手拎包浇注入可倾斜式水冷铁模中。铸锭规格:430毫米×135毫米×30毫米。
It is well known that pure aluminum ingots cast with water-cooled iron molds can be calendered. Our factory 10 years of production practice has proved that LF 2 alloy ingot heat treatment is also feasible. LF 2 alloy belongs to the heat treatment is not enhanced anti-rust aluminum alloy, mechanical properties between pure aluminum and duralumin, ingot does not require homogenization annealing before hot processing. Our factory smelts LF 2 alloy in the rotary light diesel oil reverberatory furnace with a capacity of 1 ton, without adding titanium to refine the grain. In the past with ammonium chloride refining twice, each dosage of 2 kg; now use non-toxic refining agent refining twice, each dosage is still 2 kg. Pouring temperature 700 ~ 730 ℃, hand bag pouring into the tilting water-cooled iron mold. Ingot specifications: 430 mm × 135 mm × 30 mm.