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我厂生产的ZG35CrMnSi精铸件,过去由于脱碳问题得不到解决,曾造成大批报废。为了解决这一问题,成立了以工人为主体的三结合技术攻关小组。经过一段时间的试验和生产考验,在现有条件下,找到了防止铸件表面增碳和减少脱碳现象的熔化浇注及退火热处理工艺。一、改变浇注条件铸件的脱碳,首先是在浇注中形成。过去铸件脱碳严重,有的脱碳层深达0.9毫米,超过了部标准0.5毫米的要求,而且脱碳情况也不稳
ZG35CrMnSi castings produced by our factory have been scrapped in the past due to the problem of decarburization. In order to solve this problem, we set up a three-pronged technical research team with workers as the main body. After a period of trial and production test, under the existing conditions, to find the casting surface to prevent carbon addition and reduction of decarbonization melting pouring and annealing heat treatment process. First, to change casting conditions Casting decarburization, the first is formed in the pouring. In the past, the decarburization of castings was serious, some of the decarburized layers reached a depth of 0.9 mm, exceeding the ministerial standard of 0.5 mm, and decarburization was not stable