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熔炼各种铜合金时,应用最普遍的脫氧剂是磷铜中間合金。磷銅中間合金中的磷容易跟銅合金中的氧气結合成五氧化二磷(P_2O_5)和三氧化二磷(P_2O_3)。这两种氧化物在铜合金熔化的温度下都能变成气体跑掉,起到了脫氧的作用。既然在磷铜中間合金中起脫氧作用的是磷,为什么不直接用磷来脫氧呢?这主要是由于磷的熔点低、比重小,直接投入磷的燒損太大,所以都做成磷銅中間合金。我厂每年熔炼铜合金很多。以1955年为例,这一年为銅合金脫氧消耗的磷銅中间合金大約有526公斤,价值6318元。如果能直接用赤磷粉来脱氧可
Smelting various copper alloys, the most common deoxidizer is phosphor bronze master alloy. The phosphorus in the phosphor bronze master alloy is easily combined with the oxygen in the copper alloy into phosphorus pentoxide (P 2 O 5) and phosphorus trioxide (P 2 O 3). Both of these oxides can turn into a gas at a temperature at which the copper alloy melts, playing a role of deoxidation. Since the role of dephosphorization in the phosphor bronze master alloy is phosphorus, why not directly use deoxidation of phosphorus? This is mainly due to the low melting point of phosphorus, the proportion of small direct burning of phosphorus is too large, so made of phosphor bronze Intermediate alloy. I plant a lot of melting copper alloy each year. In 1955, for example, this year for copper alloy deoxidation phosphor bronze master alloy about 526 kilograms, worth 6318 yuan. If you can use red phosphorus powder to deoxidation can be