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对ZG1Cr18Ni9奥氏体不锈钢进行了渗硼处理,渗硼剂采用含双活化剂(氟硼酸钾和氯化铵)的粉末渗硼剂:碳化硼+碳粉+碳化硅+氟硼酸钾+氯化铵,渗硼温度为950℃,渗硼时间为7h。在金相显微镜下观察渗层组织致密,齿型平坦,并测得渗层的厚度为38～42μm;经X射线衍射分析以及扫描电镜观察表明,渗层主要由FeB相组成,在过渡区有明显的增铬现象,说明硼化物层有一定的排铬作用。利用显微硬度计测得渗后形成的硼化物层的硬度可达2000HV0.1。沿硼化物—过渡区—基体方向,硬度值呈逐渐下降趋势。渗层的脆性较小,脆性级别为2级。ZG1Cr18Ni9奥氏体不锈钢通过含双催渗剂的渗硼剂渗硼,组织均匀且与基体结合紧密,硬度明显提高。
ZG1Cr18Ni9 austenitic stainless steel boronizing treatment, boronizing agent with double activators (potassium fluoborate and ammonium chloride) powder boronizing agent: boron carbide + carbon powder + silicon carbide + potassium borofluoride + chlorination Ammonium, boronizing temperature 950 ℃, boronizing time 7h. The microstructure of the disseminated layer was dense and the teeth were flat under the microscope. The thickness of the disseminated layer was 38 ~ 42μm. The X-ray diffraction analysis and scanning electron microscopy showed that the disseminated layer mainly consisted of FeB phase. Significant chromic phenomenon, indicating a layer of boride layer chromium role. The hardness of the boride layer formed by permeation measured by a microhardness tester can reach 2000 HV0.1. Along the boride - transition zone - the direction of the matrix, the hardness value showed a gradual downward trend. The brittleness of the infiltration layer is small, with a brittleness level of 2 levels. ZG1Cr18Ni9 austenitic stainless steel with dual permeability catalyst boronizing boron infiltration, uniform organization and close together with the substrate, the hardness increased significantly.