论文部分内容阅读
本文在严格控制的实验条件下,建立了磨削弧区温度同试件表面烧伤色之间的对应关系;并以扫描电镜(SEM)、电子探针(EPA)等较为先进的测试仪器为手段详细研究了K417镍基铸造高温合金缓进磨削中表面为正常、淡黄、黄褐、紫褐以及紫黑等深浅不同的色斑时诸试件表面形貌特征和对应的砂轮表面形貌特征,揭示了K417材料缓磨中表面形貌的变化特征及其形成机理。测试结果表明,K417材料缓磨表面出现烧伤色斑时,磨粒与试件材料之间存在粘结现象;试件表面出现粘结滞留的涂覆物。随表面烧伤色层次的加深,磨粒与试件材料之间的粘结越普遍、越严重,试件表面涂覆程度亦越强烈。当出现紫黑色斑时,表面还伴有微裂纹出现。
In this paper, under the strictly controlled experimental conditions, the corresponding relationship between the temperature of the grinding arc zone and the burn color on the surface of the test piece is established. By means of the more advanced testing instruments such as the scanning electron microscope (SEM) and the electron probe (EPA) The surface topography characteristics and the corresponding surface morphology of the grinding wheel when the surface of the superalloy K417 Ni-base casting superalloy was grinded with different shades, such as normal, light yellow, yellow brown, purple brown and purple black, were studied in detail Features, revealing the K417 material during buffing surface morphology changes and its formation mechanism. The test results show that when burned stains appear on the buffing surface of K417 material, the bond between the abrasive grains and the material of the specimen exists. The coating material stuck on the surface of the specimen appears. With the deepening of the burned-color surface, the more common and serious the adhesion between the abrasive grains and the specimen, the more intense the surface coating of the specimen. When the purple black spots, the surface is accompanied by microcracks appear.