优选普铁孕育剂加入量

• 机 构: 朝晖机械厂,
• 出 处: 贵州机械
• 发表日期: 1976年01期
• 关键词: 加工车间 铸铁件 孕育剂 车间生产 机械性能 体一 含硅量 化学成份 牌号 高达

一、优选前:我车间生产的普通铸铁件,多是 HT21 40牌号,过去由于化学成份不稳定,特别是含硅量过低,造成白口偏高,给冷加工车间加工带来很大困难,机械性能也达不到要求,单就135泵体一种,在今年二月到三月之内,就造成1700多件的废品。其废品率高达35%。

First, the preferred front: ordinary cast iron pieces produced in our workshop are mostly HT21 40 grades. In the past, due to the unstable chemical composition, especially the low silicon content, the high whiteness led to great difficulties in the cold processing workshop. Mechanical performance also failed to meet the requirements of a single pump body 135, February to March this year, resulting in more than 1,700 pieces of waste. The rejection rate of up to 35%.