ABRASIVE WEAR BEHAVIOR OF WC REINFORCED Ni-BASED COMPOSITE COATING SPRAYED AND FUSED BY OXY-ACETYLENE FLAME

作者：Wang, Qun^*; Chen, Zhenhua; Ding, Zhang Xiong; Chen, Ding

来源：Surface Review and Letters, 2009, 16(3): 475-485.

DOI：10.1142/S0218625X09012883

• Abrasive wear
• spraying and fusing coating
• Ni-based self-fluxing alloy

Microstructure of WC reinforced Ni-based self-fluxing alloy composite coating sprayed and fused by oxy-acetylene flame was investigated by scanning electron microscopy and energy dispersive X-ray Spectrometry, X-ray diffraction, and transmission electron microscopy. The wear performance of the coating was studied by a MLS-225 wet sand rubber wheel abrasive wear tester at various loads and sizes of abrasive particles. Also, the wear resistance of the coating was compared with uncoated ASTM1020 steel. The results indicated that the coating is bonded metal-lurgically to the substrate and has a homogeneous microstructure composed of both coarse WC and. ne carbide and boride grains such as Cr(7)C(3), Cr(23)C(6), and Ni(2)B which disperse uniformly in the matrix of gamma-Ni solid solution and Ni(3)B. The worn mass loss of the coating and ASTM1020 steel both increased with the load and size of abrasive particles, also, the coating has exhibited excellent abrasive wear resistance compared with ASTM1020 steel.

• 出版日期2009-6
• 单位湖南大学; 武汉理工大学