What should be paid attention to in the selection of cold iron raw materials for precision casting molds? In the selection of cold iron raw materials, there are many raw materials that can be used to make cold iron, so metal materials and metal materials with higher thermal conductivity and heat storage index than sand mold raw materials can be used. Common cold iron raw materials in manufacturing include pig iron, aluminum alloy profiles, high-purity graphite and alloy copper. Pig iron cold iron has a large heat storage index, can digest and absorb more calorific value, and has a relatively strong chilling ability.

What should be paid attention to in the selection of cold iron raw materials for precision casting molds?

When stainless steel precision casting is used, the forged round ingot has a low tendency to crack. When it is used, it must be ensured that its aluminum alloy has excellent exhaust pipe feeding ability. When it is used, it is to create a standard of order crystals and to improve it reasonably. The relative density of its products is usually high at forging temperatures.

Near net shape, greatly improving material utilization; especially suitable for casting complex parts, thin-walled parts and other castings that are difficult to produce by other methods, can form small thin-walled titanium alloy parts with a wall thickness of 0.5mm, and this casting uses other methods It is difficult to cast and form; it can greatly reduce the interface reaction between the casting and the casting mold, reduce the shrinkage porosity defect in the casting, refine the grains, and reduce the segregation, which can improve the performance of the casting.

There are many problems that must be paid special attention to in the production and processing of stainless steel precision casting. The fundamental reason is that the fluidity of molten steel is relatively weak. In the whole process of production and processing, people can reasonably avoid the insufficient pouring of stainless steel castings. Waving is cold insulation, so the thickness of stainless steel casting cannot be less than 8 mm.

In the whole process of application, the physical properties of stainless steel precision casting usually need to be higher than those of pig iron, but the properties of pig iron of such raw materials are somewhat worse, and the product is relatively melting point in the whole process of production. Compared with other raw materials, it is higher. In the whole process of production and processing, it is easy to cause the air oxidation of molten steel solution.

Advantages of stainless steel investment casting

The method is particularly suitable for the preparation of thin-walled castings of titanium alloys and titanium-aluminum alloys, which are alloys with high activity, high melting point and poor casting properties. It has good physical properties. Generally, it can consider the flowability and does not produce bright crystals. The temperature is 715~740℃, and the hot cracking tendency of commercial flat ingots is high.

The smelting and casting process is simple, the efficiency is high, and the production method is flexible. The average production cost is more than 50% lower than that of investment casting and centrifugal casting. In addition, pig iron cold iron is easy to make and cheap, and it is used in the production of aluminum alloy profiles and magnesium alloy precision castings, especially when it is placed at the bottom or end of the casting to improve the solidification order of the casting, usually Use cast iron cold iron. In addition, aluminum refrigeration iron is also widely used.

Conclusion

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