低功率等离子喷涂WC-Co陶瓷涂层组织:《大连海事大学学报》2007年02期

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$B/hUE,b?*^E0【摘要】:为研究热喷涂工艺对低功率等离子喷涂WC-Co陶瓷涂层的微观组织、相组成和硬度的影响规律,以普通低碳钢Q235A为基体,采用低功率(3~6.6 kW)内送粉等离子喷涂方法,在弧电压恒定、电流增加的条件下,制备不同功率下的涂层.实验结果表明:与传统等离子喷涂WC-Co涂层相比,低功率等离子喷涂WC-Co涂层的显微硬度有所提高,而其脱C率和孔隙率大大降低;涂层中除粉末原有的WC相外,还有喷涂过程中新生成的W2C、Co3W3C和Co3W9C4相.电流增加,涂层中主相WC质量分数降低,而W2C等其他三相的质量分数增多.水利论文:s't(j eI6o

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大连海事大学机电与材料工程学院 大连海事大学机电与材料工程学院 大连海事大学机电与材料工程学院 大连海事大学机电与材料工程学院

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7uI&{e9y'SHfl i0低功率 等离子喷涂 碳化钨 陶瓷涂层 微观组织 显微硬度

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【分类号】:TG174.442

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0引言机械设备运行中的磨损不仅降低产品使用寿命和可靠性,而且浪费了大量能源和材料,因此提高金属表面耐磨性,防止和减少磨损具有十分重要的意义.WC-Co合金中,WC是弥散硬质相,Co是黏结剂,把WC硬颗粒黏结在一起,具有较高硬度和耐磨性,广泛应用于提高部件耐磨性的许多领域[1-3]

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