Due to the different functions of various parts in the mold, the requirements and selection principles of its materials are also different. Therefore, the reasonable selection of die material is also an important operation in the design of stamping die, which has a great impact on the cost and production quality of die.
At present, with the increasing development of China's automobile industry, people have more standards for the quality and demand of automobile products. The key factor affecting the performance of automobile is the selection of stamping die materials.
Generally speaking, automotive stamping die materials need to meet the following conditions:
1. For the automobile stamping die with simple shape and small size, T8A, T10A and other common carbon tool steel materials can meet the production requirements.
2. Alloy tool steels or high-speed tool steels, such as Cr12, Cr12MoV, W18Cr4V, w6mos, Cr4V2, are often used as stamping die materials for automobile stamping dies with complex shape and large size.
3. Some automotive dies have high requirements for stamping accuracy and service life, so cemented carbide or steel bonded cemented carbide are commonly used as raw materials, such as YG15, YG20, GW50, etc.
4. There are many large parts in automobile stamping dies, which are usually made of common cast iron or cast carbon steel, such as gray cast iron HT250, cast steel 2g270-500, etc., and some dies will be strengthened by surfacing at the edge.
There are many kinds of automobile stamping dies. We should not only pay attention to the material selection of main working dies, but also pay attention to the materials of guide pillar and guide set. Generally, low carbon steel or bearing steel of high quality carbon steel can meet the needs of production and quenching.
In general, the manufacturing of automobile stamping die has to go through the following processes, that is forging, cutting and heat treatment. In order to ensure the manufacturing quality of the mold and reduce the production cost, the material should have excellent malleability, machinability, hardenability, hardenability, grindability and decarbonization sensitivity, so the material selection of automobile mold is important and strict.