CAJ | 학술논문

通过超音速火焰(HVOF)技术,采用不同的工艺参数在低碳钢表面喷涂Cr_3C_2-NiCr涂层;对所得涂层进行磨粒磨损实验.同时考察低碳钢磨损性能,比较喷涂层之间的磨损性能及其与基体的磨损性能.采用光学金相显微镜观察涂层断面的形貌,通过显微硬度计测试涂层的显微硬度.结果表明.Cr_3C_2-NiCr涂层磨损质量损失与磨程基本呈线性关系;涂层的磨损性能高于低碳钢;不同参数制备的涂层,其磨粒磨损性能也不一样,其中燃气流量为38 L/min时的涂层磨损性能较好,该条件下涂层的断面显微组织呈现层状结构,其显微硬度也较高.
통과초음속화염(HVOF)기술,채용불동적공예삼수재저탄강표면분도Cr_3C_2-NiCr도층;대소득도층진행마립마손실험.동시고찰저탄강마손성능,비교분도층지간적마손성능급기여기체적마손성능.채용광학금상현미경관찰도층단면적형모,통과현미경도계측시도층적현미경도.결과표명.Cr_3C_2-NiCr도층마손질량손실여마정기본정선성관계;도층적마손성능고우저탄강;불동삼수제비적도층,기마립마손성능야불일양,기중연기류량위38 L/min시적도층마손성능교호,해조건하도층적단면현미조직정현층상결구,기현미경도야교고.
Cr_3C_2-NiCr coatings were prepared on low-carbon steel surface using high velocity oxy-fuel (HVOF) spraying technology with different parameters. The abrasive wear performance of the coatings and mild steel were studied by wet rubber wheel abrasive tester. The abrasive wear resistance of the coatings deposited under different conditions was researched. Cross section of the coatings was observed by metallurgical microscopy. Hardness of the coatings was tested by micro-hardness tester. The results show that wear mass loss of Cr_3C_2-NiCr coatings increases linearly with wear distance. Wear properties of the coatings are better than that of mild steel. The coatings deposited under different conditions shows dissimilar wear resistance. The coating sprayed in 38 L/min flow rate of fuel gas shows better wear performance and the laminated microstructure appears in the cross-section, and micro-hardness of the coating is better.