How to solve the magnetic problem of stainless steel casting

1. How to solve the magnetic problem of stainless steel casting? After the completion of the production of stainless steel, if the products are with magnetic, it will cause the quality problems. So, we casting factory should pay attention to many details during production of stainless steel casting, thus to avoid the cooling of stainless steel casting with magnetic. Below, let’s Parfect show you how to solve the magnetic problem of stainless steel castings. As we all know, the production of stainless steel castings of austenitic stainless steel should not be with magnetic. But some produced products are with magnetic. Some factories think that is the reason for the material. But after spectral detection, material is qualified without abnormal. People can not find the reason, thus can not solve this problem. We have a new discovery after checking large number of information and further discussing with the technical personnel. Part of austenitic stainless steel will be transformed into martensitic stainless steel during the cooling process. The core structure of martensitic stainless steel is with magnetic. This is the reason why the stainless steel casting is with magnetic. Then, why the austenitic structure is

2. transformed into martensite structure? Stainless steel according to the structure can be divided into austenitic stainless steel, martensitic stainless steel, and ferritic stainless steel. Austenitic stainless steel is the largest used one. Austenitic stainless steel structure, in theory, there’s no magnetic. But after cold working, it will be magnetic. According to some studies at home and abroad, the reason for austenitic stainless steel casting with magnetic is austenitic stainless steel structure transformed to martensitic steel structure, after heating steel to the austenitic transformation temperature and maintaining a period of time. When cooling the stainless steel to required shape, the structure of steel will be changed to martensite structure, due to the rapid cooling process. Until the temperature dropped to below the formation of martensite structure transition temperature, it will stop the transition. In the production of stainless steel castings, the stability of austenitic stainless steel, processing deformation, processing methods are all likely to affect its transformation to martensitic stainless steel.

3. Therefore, according to the causes of martensite and the impact of factors, to avoid the stainless steel castings with magnetic, we should choose the material with high content of austenitic stainless steel austenitic elements. Solution treatment can also be used to eliminate magnetic and work hardening problem. Recently, in the market, there’s a kind of “alloy degaussing agent” that can eliminate the magnetism of the stainless steel castings, and transform the iron element into the austenite, so as to achieve the degaussing purpose. At the same time, after adding the alloy degaussing agent, the corrosive resistance and salt spray test of the stainless steel casting are changed better. More parfect stainless steel casting foundry news , welcome to visit website : www.casting-forgings.com to know more