The fatigue resistance of mold steel refers to the stability of the material under repeated loading for a long time, which mainly refers to the fatigue life and fatigue strength of the material. In actual work, fatigue is one of the main damage modes of mold steel. Therefore, the fatigue resistance of mold steel is one of the important material properties.
To improve the fatigue resistance of mold steel, it needs to be optimized from many aspects. Here are some common methods:
1. Optimize material selection. Reasonable selection of chemical composition and addition of alloy elements ensures that the steel has high strength, hardness, toughness, and fatigue resistance.
2. Optimize the heat treatment process. Select the appropriate heat treatment process and process parameters to ensure that the steel has an appropriate organizational structure and stress state.
3. Improve surface quality. Use appropriate surface treatment methods, such as grinding, polishing, pickling, etc., to remove surface defects and oxide layers and reduce roughness.
4. Optimize design and manufacturing processes. Reasonably design the shape and size of parts to avoid excessive stress concentration. Advanced manufacturing processes and tools are used to ensure part size and surface quality.

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