How does an investment casting factory prevent castings from rusting?
2023-03-21
precision casting is a kind of casting with less cutting or no cutting, which has the characteristics of beautiful surface, good overall precision and high quality. Many buyers are also purchasing for these characteristics of precision castings. Among them, the demand for stainless steel precision castings is the strongest. Compared with investment castings of other materials, stainless steel investment castings have a longer service life. Many people think that this is related to the fact that stainless steel materials will not rust. Is this popular assumption really correct? In fact, stainless steel materials are not really rust-free. If the production process is not handled properly, the surface of stainless steel investment castings will still rust. In order to prevent rusting of precision castings, what do Precision Casting factories generally do? Usually, in order to reduce the rusting factors of investment castings, investment casting manufacturers will consider carefully from multiple angles to minimize the chance of rust. 1. In terms of structural design, precision casting manufacturers will carry out the production and modeling design that are conducive to the model and core box. When selecting the mold core, the precision casting factory will ensure the air permeability of the mold, which can stably discharge a large amount of gas generated when the stainless steel molten metal is poured; the structure of the precision casting should be able to make it gather as much as possible without any obstruction when cooling and solidifying 2. In terms of external casting, the shape of precision castings should be simple and easy to cast. The flatness of each plane of the castings must be fully guaranteed to prevent dust or certain chemical components from hiding in the holes due to uneven castings, causing Chemical corrosion of castings.
