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铝青铜铸件在熔炼过程中不仅易产生氧化铝夹杂和氢,且氢被铜液吸收后形成气孔。因此,在熔炼铝青铜时要进行精炼处理,以除渣去气。 1.生产情况 (1)熔炼过程 我厂生产的系列泵用喷嘴材质为铝青铜ZCuAl9Mn2,熔炼时先将铜锭预热,而后加入到已烧至暗红色的柴油坩埚内快速熔化,铜液温度达1250℃以上出炉、扒渣、精炼及再扒渣,然后再精炼后做含气试验,合格后浇注,浇注温度1100~1150℃。 (2)所用精炼剂 1995年9月以前使用1~#精炼剂,其组分为60%食盐,40%氟硅酸钠。其中氟硅
Aluminum bronze casting in the melting process is not only easy to produce alumina inclusions and hydrogen, and hydrogen is absorbed by the copper liquid to form pores. Therefore, in the smelting of aluminum bronze to be refined to slag to the gas. 1. Production (1) Smelting Process The series of pump nozzles made by our factory are made of aluminum bronze ZCuAl9Mn2. The copper ingots are preheated before melting, and then melted to the dark red diesel crucible for rapid melting. The temperature of the copper liquid Up to 1250 ℃ above baked, slag, refining and re-slag, and then do the gas after refining test, qualified after pouring, pouring temperature 1100 ~ 1150 ℃. (2) refining agent used before September 1995 1 ~ # refining agent, the composition of 60% salt, 40% sodium fluoride. Which fluorine silicon