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基于煤机设备在特殊环境下的使用特点,选择液压支柱管用20钢作为基体材料,以316L不锈钢作为熔覆材料,采用高功率半导体光纤耦合激光器在其上进行激光熔覆实验,并对熔覆后涂层的形貌、硬度、耐蚀性以及耐磨性进行研究。结果表明,熔覆层与基体呈现出较好的冶金结合,且并未出现明显裂纹、孔洞等缺陷;此外,熔覆层的硬度、耐蚀性和耐磨性相对基体都有了很大的提高。根据分析可知,熔覆层性能的提高是与熔覆过程中显微组织的变化及热影响密切相关的,熔覆层中的析出相、硬质颗粒以及合金中的微量元素也对其性能有很大影响。研究表明316L不锈钢作为一种良好的熔覆材料,可用于煤机设备液压支架管的激光熔覆修复。研究以液压设备用零件为对象,因此对于煤机修复方面有重要的参考价值。
Based on the characteristics of coal-mining equipment in special environment, 20 steel as the base material, 316L stainless steel as cladding material, laser cladding experiment with high-power semiconductor fiber-coupled laser and laser cladding After the coating morphology, hardness, corrosion resistance and wear resistance were studied. The results show that the cladding layer and the substrate exhibit better metallurgical bonding without obvious cracks, voids and other defects. In addition, the hardness, corrosion resistance and wear resistance of the cladding layer are relatively large improve. According to the analysis, the improvement of the performance of the cladding layer is closely related to the microstructure change and thermal influence during the cladding process. The precipitated phase, the hard particles in the cladding layer and the trace elements in the alloy also have the property of Great influence. Research shows that 316L stainless steel, as a good cladding material, can be used for laser cladding repair of hydraulic support tube of coal machine equipment. Research for hydraulic equipment parts for the object, so for coal repair has important reference value.