论文部分内容阅读
叙述了液体法碳、氮、硼三元共渗的工艺、应用效果及渗层组织结构分析结果。这种工艺所需设备简单,原料无毒、便宜、来源方便,处理温度不高,工件变形小,渗层硬度高,应用效果良好。采用“少吃多餐,多加尿素”的新盐补加制度可以保证盐浴的稳定性。渗层的表面是渗碳体薄层,往里是高碳、氮含量的扩散层,其淬火组织为点球状的渗碳体加高碳、氮含量的高硬度的透镜状马氏体以及残余奥氏体。对含有氮化物形成元素的钢,还发现在渗层有极其细弥的高硬度的氮化物。正是这种组织保证了渗层的高硬度和高耐磨性。最后还指出了现行工艺的缺点及今后改进努力的方向。
The process of ternary infiltration of carbon, nitrogen and boron by liquid method is described. The application results and the analysis results of the structure of the infiltrated layer are described. The equipment required for this process is simple, non-toxic raw materials, cheap, convenient source, the processing temperature is not high, the workpiece deformation is small, the hardness of the diffusion layer, the application effect is good. The use of “Eat less meals, add more urea,” the new salt supplement system can guarantee the stability of salt bath. The surface of the infiltration layer is a thin layer of cementite, which is a diffusion layer of high carbon and nitrogen content, and the quenched structure is a point-spherical cementite with lenticular martensite with high hardness and nitrogen content and residual martensite Austenitic. For steels containing nitride forming elements, it is also found that nitrides of extremely high hardness are present in the coating. It is this organization that guarantees high hardness and high wear resistance of the layer. Finally, it points out the shortcomings of the current technology and the direction of improvement efforts in the future.