Laser Strengthening and Repair of Mining Machinery Parts - Pick Bits

The pick is a key component of the coal mining machine that directly cuts coal and rock, and it is a wear part. Its main failure mode is wear failure, primarily manifested as the wear of the pick's end matrix, leading to the spalling of the alloy head. Generally, domestic ordinary picks have the characteristics of poor wear resistance and short service life, thereby increasing the intensity of underground operations and reducing production efficiency. Therefore, it is necessary to develop a surface treatment technology that is advanced and stable in process to improve the wear resistance of the pick's end and extend its service life.

After laser cladding, the average microhardness of the pick is HV800, and the Rockwell hardness is 65HRC. The average microhardness of the laser-alloyed pick is HV1099, and the Rockwell hardness is 70HRC. The average microhardness of the laser-quenched pick is HV750, and the Rockwell hardness is 62HRC. The laser cladding alloying process coating forms a metallurgical bond with the matrix, resulting in high bonding strength.

The surface hardness and wear resistance of the laser-strengthened pick end are significantly improved, and the service life of the pick is significantly extended. Compared with ordinary picks, the life of laser-clad picks is extended by 3-4 times, and the life of surface-alloyed picks is extended by 5-6 times. The application of laser technology in pick surface engineering utilizes the highly concentrated energy and direction of the laser beam to perform pollution-free operations in the atmospheric environment, forming a high-hardness, crack-free high-performance coating on the surface of inexpensive metal materials, which metallurgically bonds with the matrix. It combines the good toughness of the metal with the high hardness, high chemical stability, and high wear resistance of the coating material, innovating the production process of high-performance coatings. The application of a new type of wear-resistant laser-strengthened pick can reduce pick replacement and maintenance time, improve production efficiency, save significant funds, and has broad and profound significance for building a conservation-oriented society.

Mining Large Hydraulic Support Column

Domestically, ordinary columns are typically surface electroplated for rust and corrosion prevention. Due to the poor wear resistance of the coating, the service life is 1-1.5 years, and the coating may peel or flake, allowing emulsified fluid to corrode the column surface, affecting the performance of the hydraulic support.

After laser strengthening treatment, the surface hardness of the matrix reaches HV410. The application of laser technology in column surface engineering utilizes the highly concentrated energy and direction of the laser beam to perform pollution-free operations in the atmospheric environment, forming a high-hardness, crack-free high-performance coating on the surface of inexpensive metal materials, which metallurgically bonds with the matrix. It combines the good toughness of the metal with the high hardness, high chemical stability, and high wear resistance of the coating material, innovating the production process of high-performance coatings.

The service life of the new laser-strengthened stainless steel column is 5-6 times that of domestic columns, with outstanding features such as advanced technology, high safety performance, and strong production capacity. The application of the new laser-strengthened stainless steel column can reduce column replacement and maintenance time, improve production efficiency, save significant funds, and has broad and profound significance for building a conservation-oriented society.