The production status and trend of the world's iron castings is that the proportion of gray iron castings has dropped significantly, but it still occupies a major position. The output of ductile iron

Wooden molds are mainly made of wood in the case of single-piece small batch production. Wooden molds made of wood have the advantages of light weight, short production cycle, and easy processing and

The casting coating is improved and adjusted on the basis of the traditional casting coating, which can prevent the oxidation of the high-temperature liquid metal, and no chemical reaction occurs duri

1. Chemical composition of molding sand for cast iron platforms: Quartz sand is generally used as a raw material for the production of gray cast iron platforms, and the mass fraction of silica is 90%-

The production of steel castings is often carried out in dusty places, and there is often a lot of dust in the air, which constantly falls on the surface of the equipment. They can be removed with wat

The production of steel castings is often carried out in dusty places, and there is often a lot of dust in the air, which constantly falls on the surface of the equipment. They can be removed with water or alkaline solutions. However, sticky soils require high pressure water or steam to clean.

The production status and trend of the world's iron castings is that the proportion of gray iron castings has dropped significantly, but it still occupies a major position. The output of ductile iron castings has continued to grow, and vermicular graphite iron and special iron have also developed by leaps and bounds. The output of gray cast iron is decreasing year by year, but the proportion of cast iron in cast iron is increasing. Strengthening the experimental research of gray cast iron is undoubtedly the development direction of gray cast iron in my country.

1. Chemical composition of molding sand for cast iron platforms: Quartz sand is generally used as a raw material for the production of gray cast iron platforms, and the mass fraction of silica is 90%-95%.

Wooden molds are mainly made of wood in the case of single-piece small batch production. Wooden molds made of wood have the advantages of light weight, short production cycle, and easy processing and shaping. The wooden mold shrinks when the water evaporates and expands after absorbing moisture. The drying shrinkage and moisture expansion in all directions are very different, so the wooden mold is easily deformed. The way to reduce the deformation of the wood mold is to dry the wood. In addition, a lot of wood is used for layering and bonding on the wood formwork structure. The higher the wood mold requirements, the more splicing layers. This reduces the amount of deformation.

The casting coating is improved and adjusted on the basis of the traditional casting coating, which can prevent the oxidation of the high-temperature liquid metal, and no chemical reaction occurs during the contact between the casting mold and the high-temperature liquid metal. And can absorb and digest nitrogen, sulfur, carbon and other gases.