【摘要】 采用光学显微镜和显微硬度计等仪器,研究气体爆燃时,铁铝涂层的表面形貌、显微硬度的变化.当单位时间内提供粉末能量减少时,喷涂涂层的微观组织是黑白相间的片层组织.增加单位时间内提供粉末的能量.可得到均匀的组织涂层.当氧气和乙炔流量比为1时,涂层中各点的显微硬度近似相等,显微硬度值为552HV0.2.选用新型耐锌腐蚀涂层材料———铁铝合金材料,在工件表面喷涂铁铝合金保护层,探讨铁铝合金材料涂层质量与喷涂工艺的关系,从而获得最佳的耐锌腐蚀涂层.更多还原

【Abstract】 The paper studies the change of morphology and microhardness on the ironaluminum coating layer with gas spraying conditions by means of the optical microscope and microhardness tester etc. It is found that with the decrease of powder energy supplied in unit time, the microstructure of spraying coating will became lamellalike ,black alternating with white. And when powder energy supplied in unit time increase, a coating with homogeheous structure can be obtained. When flowratio of oxygen to ethyne is 1, the microhardness of coating along the depth direction is approximately equal, and microhardness’s value became 552HV0.2. It has been abtained that a hot spraying ironaluminum alloy protection coating on workpiece surface using the new zinccorrosion resisting ironaluminum alloy coating material which was invented by Professor. Gao Yang and the relationship between the quality of the ironaluminum alloy coating material and the spraying technology has also been discussed in order to acquire the best zinccorrosion resisting coating.更多还原