Sandblasting The treatment strengthening is to use hard pellets to hammer the metal surface at high speed and continuously, so as to cause obvious cold work and hard bottoming. Sand blasting can significantly change the ground stress condition, microscope strength, external economic appearance and phase composition of the metal surface, thus improving the fatigue limit, impact damage resistance and intergranular corrosion resistance of abrasive tools. Sand blasting can also change the roughness of abrasive tools, and reasonably remove the surface moldy layer caused by wire cutting.

With the development trend of industrialization and technology, higher regulations are put forward for the performance indicators of abrasive tools. Diligence in reducing the production cycle of abrasive tools, improving the quality of abrasive tools, and increasing the service life of abrasive tools. The immediate or indirect social and economic benefits and economic benefits are immeasurable. Raw materials and heat treatment process are the most important essential elements that endanger the quality, characteristics and service life of abrasive tools. 60% of the initial ineffectiveness of abrasive tools is caused by the elements of raw materials and heat treatment process. In order to improve the compressive strength of the mold and the abrasion resistance of the abrasives, fully explore the development potential of the mold material characteristics, and increase the service life of the abrasives, a lot of reasonable countermeasures have been taken to obtain unique characteristics and greater technical economic benefits from saving power and energy, saving resources, and making full use of the development potential of the characteristics of raw materials, The development trend and the application of surface strengthening production process are the key development prospects for improving the performance index and service life of abrasive tools. Shot blasting strengthening is one of the economic development, simple and reasonable processing methods of abrasive surface technology, which is very worthy of vigorous development.

The sand blasting strengthening method is simple and easy to implement, which saves resources. It is suitable for blanking dies, cold working dies, cold heading dies, hot forging dies and other abrasives dominated by fatigue and ineffectiveness. For example, when the forging dies are in active service, they are subject to bending and thermal deformation, often resulting in microscopic cracks due to partial compromise, Sandblasting The process causes the pressure stress energy to delay the generation of microscope cracks, and then delay the generation of grinding tool cracks. Sand blasting is a simple, low-cost, and widely used technology to strengthen the surface of grinding tools. The practical effect of strengthening is very obvious and effective immediately, greatly increasing the service life of grinding tools bearing alternating load, It cannot be compared with other enhancement methods.