What are the tool materials for precision machining? What is the performance?
In the process of cutting metal. The material of the cutting part of the tool. under greater pressure. Higher temperature and severe friction cause tool wear. Tool life and productivity. Depends on whether the tool material has the proper cutting performance. also. The manufacturability of the material of the cutting part of the tool also has a significant impact on the quality of the manufacturing tool and the sharpening tool. therefore. The tool material must have the following properties:
- High wear resistance Wear resistance usually depends on hardness. The higher the hardness of the material. The better the abrasion resistance. The more carbide particles with good wear resistance are contained. The finer the grains. more evenly distributed. The better the abrasion resistance.
- The hardness of the cutting part of the high hardness tool is higher than the hardness of the workpiece material. in room temperature. The tool hardness should be higher than 60HRC.
- High heat resistance Heat resistance refers to the performance of the hardness of the cutting part of the tool at room temperature at high temperature. It can be expressed by hot hardness or high temperature hardness.
- Good process performance for ease of manufacture. The material of the cutting part of the tool should have good properties such as forging, welding, heat treatment and grinding. at the same time. It should also meet the requirements of abundant resources and low prices as much as possible.
- Sufficient strength and toughness The cutting part of the tool is subjected to various stresses and impacts. To prevent tool chipping and chipping. Must have sufficient strength and toughness. It is usually expressed by the flexural strength and impact toughness of the material.