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主滑閥是我厂生产的貨車三通閥配件中的一个零件,用錳黄銅鍛成,成分(％)如下(根据苏联图紙要求,本厂自己澆鑄的):銅51～54、錳4.0～5.5、鉄0.6～1.2、鉛0.7～1.2、杂質小于0.5,其余都是鋅。改进以前的鍛造方法是这样的: 把Φ100銅錠,在自由鍛錘上拔成60×22公厘扁料,用剁刀切成48公厘长的坯料,利用图1的預鍛模进行預鍛,最后在图2胎模內燜成形,
The main slide valve is a spare part of the truck’s three-way valve parts manufactured by our factory. It is forged with manganese brass, and its composition (%) is as follows (according to the drawings of the Soviet Union, the factory casts itself): copper 51-54, manganese 4.0 ~ 5.5, 鉄 0.6 ~ 1.2, lead 0.7 ~ 1.2, impurities less than 0.5, the rest are zinc. Improve the previous forging method is this: Φ100 copper ingot, the free forging hammer into 60 × 22 mm flat material, with a chopper cut into 48 mm long blank, using the pre-die of Figure 1 pre- Forging, and finally in Figure 2 mold stew shape,