When steel casting manufacturers cast castings, they often cause defects in the castings due to coating quality problems. Many people are confused that coating is just a small step. How can this happen? In fact, there are no big or small steps in casting. Mistakes in any even inconspicuous step will lead to quality problems or even scrapping of the casting. The purpose of applying paint in the modeling is to improve the gloss of the casting surface and prevent casting defects such as sand adhesion, which is actually very effective.
When the refractoriness of the coating is insufficient, a chemical reaction occurs when the coating comes into contact with high-temperature molten metal, causing sand to stick to the surface of the casting; when the poor fluidity and high viscosity of the coating cause the coating to flow downward and not drip, then the steel casting manufacturer passes Years of casting experience have found that flow marks will occur on the surface of the casting cavity; during the coating and spraying process, the poor interlayer adhesion between the substrate and the paint will lead to paint peeling problems, making the produced castings defective. Quality problems, poor appearance and quality, serious ones need to be scrapped and reworked, which delays the production cycle; casting coatings also have good sand resistance, crack resistance, preservation, and certain surface strength, etc., so that the coating solidifies It can prevent mold damage when encountering external scratches, transportation, core setting and box closing. If the coating does not have these good effects, many casting quality problems will occur in production.
Therefore, steel casting manufacturers need to choose high-quality coatings, which can effectively avoid mechanical and chemical sand sticking on the surface of castings, and also improve the surface properties and internal quality of castings.
Zhejiang Jinhua Shanvim Industry and Trade Co., Ltd., established in 1991. The company is a wear-resistant parts casting enterprise. The main products are the wear-resistant parts such as mantle, bowl liner, jaw plate, hammer, blow bar, ball mill liner, etc.. There are medium and high , Ultra-high manganese steel, medium carbon alloy steel , low, medium and high chromium cast iron materials, etc.. It mainly produces and supplies wear-resistant castings for mining, cement, building materials, infrastructure construction, electric power, sands and gravel aggregates, machinery manufacturing and other industries.
Post time: Jan-05-2024