AC-HVAF制备WC-10Co-4Cr涂层抗磨粒磨损性能研究
Study on Abrasive Wear Performance of WC-10Co-4Cr Coating Sprayed by AC-HVAF
赵 翔1,2, 李 萍2, 王 群3, 杨贵彬4
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作者单位：(1. 安徽工程大学 现代教育技术中心, 安徽 芜湖 241000; 2. 合肥工业大学 材料科学与工程学院, 安徽 合肥230009; 3. 湖南大学 材料科学与工程学院, 湖南 长沙 410082; 4. 赣州章源钨业新材料有限公司, 江西 赣州 341000)
中文关键字：活性燃烧高速燃气； 涂层； WC-10Co-4Cr； 磨粒磨损
英文关键字：AC-HVAF; coating; WC-10Co-4Cr; abrasive wear
中文摘要：采用活性燃烧高速燃气(AC-HVAF)喷涂工艺制备了WC-10Co-4Cr涂层，测试了涂层的结合强度、显微硬度、气孔率以及抗磨粒磨损性能。并利用XRD对喷涂粉末及涂层进行了相结构分析，用扫描电子显微镜对喷涂粉末、磨粒磨损后的涂层表面形貌进行了观察。结果表明：在喷涂过程中，仅有很少量的WC发生合金化。涂层的结合强度和显微硬度高，组织结构致密。在相同的实验条件下，16Mn钢的磨粒磨损质量损失是WC-10Co-4Cr涂层的266倍，这表明HVAF制备的WC-10Co-4Cr涂层具有优异的抗磨粒磨损性能。
英文摘要：WC-10Co-4Cr coating was deposited by AC-HVAF spraying process. The bond strength, microhardness, porosity and abrasive wear performance of the coating were measured; phase structure of the feedstock powder and the coating were analyzed by XRD. The characterizations of spraying feedstock powder, microstructure and surface micrograph of the attrition surfaces were analyzed by SEM. The results show that the WC does not decompose obviously during spraying, the coating has high bond strength, high microhardness and compact structure. The mass loss of 16Mn steel is 266 times higher than that loss of the coating, which demonstrates excellent wear resistance of the WC-10Co-4Cr coating.