In order to increase the local cooling speed of stainless steel precision casting castings, the chilled matter placed inside the cavity and on the working surface is called cold iron. In the production of stainless steel precision casting, cold iron, pouring system and riser are often used together to control the solidification process of castings and obtain qualified castings.

The selection of stainless steel precision casting cold iron materials, there are many materials that can be made of cold iron, and all metal and non-metal materials with large thermal conductivity and heat storage coefficient than sand materials can be selected. The commonly used cold iron materials in the production are cast iron, aluminum alloy, graphite and copper alloy. The heat storage coefficient of cast iron cold iron is large, it can absorb more heat, and has relatively strong chilling capacity. Stainless steel precision casting cast iron cold iron is easy to make and low cost, and has been widely used in the production of aluminum alloy and magnesium alloy precision casting.

When we all choose the cold iron material for stainless steel precision casting, we should all choose in accordance with the correct method, and choose our suitable and satisfactory casting method is what we need.

Second, what aspects of stainless steel precision casting are close to

Stainless steel precision casting is a casting process with little or no cutting, which is an excellent process technology in the casting industry, and its application is very wide. Stainless steel precision casting is also a representative of the development of foundry productivity, for the development of China's precision casting industry, it should be promoted to the following four goals. In addition to the casting technology, China's stainless steel precision casting industry should also be very close to the following four aspects:

1. Improve casting quality and reliability, and produce excellent near-final castings;

2, shorten the delivery time;

3, protect the environment, reduce and even remove pollution;

4, reduce production costs.