Why is the carbon content of Guangdong stainless steel castings too high?

If the carbon content is too high, the carbon steel castings will become inferior and cause extravagance and waste. Many people don’t know the cause. Only by understanding the cause can we take effective measures to prevent it. Next, let’s introduce the carbon content of carbon steel castings in detail. Reasons for being too high:

1. The pouring standard setting of Guangdong stainless steel castings is unscientific: if the pouring filling step is set too long, the pouring desolubilization temperature in the whole pouring process will be low, and the wall thickness expansion part of the casting, especially the casting desolubilization process, will be slow, leading to The extension of the equivalent time of high-efficiency liquid phase-consolidation in Guangdong stainless steel castings promotes the extension of the desolventization time of Guangdong stainless steel castings, and increases the amount of nitriding and carbon deposits.

2. The carbon moisture content of smelting seasonings in the manufacturing of stainless steel castings in Guangdong is not strictly controlled, and the carbon content of various scrap steels and whether there are raw materials with other alloy components in various scraps is vague.

3. The pouring system configuration of Guangdong stainless steel castings is unscientific: especially the vacuum packaging system software configuration is unscientific, equipped with a pouring sand box or casting processing technology and shape, resulting in a difference in the vacuum value of the pouring box when pouring the entire pouring. It is too large or the specific vacuum value is insufficient, and the information displayed by the vacuum pressure gauge is an incorrect value that meets the requirements of the performance parameters, making it difficult for the decomposition reaction substances on the surface to be quickly discharged into the cavity, causing nitriding or carbon deposits on the casting.