精品文档---下载后可任意编辑万米深井钻机刹车盘表面激光熔覆组织与性能讨论的开题报告Title: Microstructure and Properties of Laser Cladding on Brake Disc Surface of 10,000m Deep Well Drilling RigAbstract:The brake disc of 10,000m deep well drilling rig is an important safety component, and its reliability and durability are crucial for drilling operations. In order to improve the wear resistance and thermal stability of the brake disc, the surface of the brake disc is treated by laser cladding. In this study, the microstructure and properties of the laser cladding on the brake disc surface were investigated.Firstly, the laser cladding process parameters were optimized by single-factor and orthogonal experiments. The microstructure of the laser cladding layer was observed by scanning electron microscopy (SEM) and the phase composition was analyzed by X-ray diffraction (XRD). The microhardness and wear resistance of the laser cladding layer were tested by microhardness tester and wear tester.The results showed that the optimal laser cladding process parameters were laser power of 1400W, scanning speed of 1000mm/min, and powder feed rate of 1.5g/min. The laser cladding layer was mainly composed of γ-Fe, Fe3C, Fe7C3 phases and had a fine dendritic structure. The microhardness of the laser cladding layer was significantly higher than that of the substrate, and the wear resistance was improved by 4.5 times.In conclusion, the laser cladding on the brake disc surface of 10,000m deep well drilling rig can significantly improve the wear resistance and thermal stability of the brake disc. This study provides a theoretical basis and technical support for the practical application of laser cladding technology in the field of drilling engineering. Keywords: laser cladding, brake disc, wear resistance, microstructure, deep well drilling rig.
