.Fatigue immunity--reflects the performance parameters of raw material precision machining CNC tools to resist fatigue damage under the alternate load effect. Hot work abrasives often work under the standard of rapid cooling and rapid heating, which will inevitably produce different levels of hot and cold fatigue and cracking. Therefore, it is expected to have a high immunity to hot and cold fatigue to prevent initial ineffectiveness. Titanic shipwreck (2) Use performance requirements 1. Heat treatment characteristics include forging, forging, electric welding and other characteristics. According to the different manufacturing and processing techniques of abrasive tools, different production and processing characteristics can be clearly defined, which are subject to the damage of the composition of the mold material, the quality of the metallurgical industry, the mechanism and other factors. 2. The performance of cold drawing includes the characteristics of drilling, grinding and polishing, grinding, cold extrusion and cold drawing. Abrasive products sometimes require high process performance, low roughness and high precision, so they have high requirements on workability and grinding and polishing characteristics. 3. Characteristics of heat treatment method In fact, injection molding machine parts are a kind of heat treatment characteristics. In the accident of ineffective and safe ship parts of abrasive tools, the factors caused by quenching and tempering treatment account for about 52% of the total ineffectiveness. There is a great danger in quality.