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以中碳锰铁、高碳铬铁,硅铁、碳化硼、钒铁、石墨、钛铁以及还原铁粉等作为预制合金粉末,通过氩弧熔覆技术在基体表面制备出一层耐磨性良好的涂层。同时,借助光学显微镜、硬度计以及UMT-2摩擦磨损试验机等实验仪器对耐磨涂层的组织和耐磨性能进行了研究分析。结果表明:随着氩弧熔覆电流的增加,碳化物M_(23)C_6的含量先增加后减少。在电流为150 A时,涂层中的碳化物M_(23)C_6含量达到最大,且此时碳化物M_(23)C_6的晶粒尺寸也相应达到最大。此外,随着焊接电流的增加,硬度与耐磨性都整体呈先增加后减小的变化规律。在电流为110 A时,涂层硬度最小,磨损损失高达36 mg,耐磨性最差;而当电流为150 A时,涂层硬度达到最大值,磨损损失减小到8 mg左右,此时的耐磨性达到最佳。
In the carbon ferromanganese, high carbon ferrochrome, ferrosilicon, boron carbide, vanadium iron, graphite, ferrotitanium and reduced iron powder as a preformed alloy powder, by argon arc cladding technology in the substrate surface prepared a layer of wear resistance Good coating. At the same time, the microstructure and wear resistance of the wear-resistant coating were studied by means of optical microscope, hardness tester and UMT-2 friction and wear tester. The results show that the content of M_ (23) C_6 carbides first increases and then decreases with the increase of arc current. When the current is 150 A, the content of M_ (23) C_6 in the coating reaches the maximum, and the grain size of the carbide M_ (23) C_6 correspondingly reaches the maximum. In addition, with the increase of welding current, the hardness and wear resistance all increase first and then decrease. When the current is 110 A, the hardness of the coating is the lowest, the wear loss is as high as 36 mg and the wear resistance is the worst. When the current is 150 A, the hardness of the coating reaches the maximum and the wear loss is reduced to about 8 mg The wear resistance to achieve the best.