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根据轮胎模具加工处理流程制备出喷砂试件,并对喷砂试件进行抛光、渗氮、Cr N涂层、Teflon涂层等表面处理。再根据对轮胎模具耐磨损、防粘、易脱模、易清洗、硫化质量好、寿命长等表面性能的分析,对不同表面处理方式的试件进行粗糙度、硬度、疏水性、摩擦系数等表面完整性参数的测量,比较不同的表面处理方式对轮胎模具表面完整性影响。结果表明:抛光、Teflon涂层处理后表面疏水性、摩擦系数水平都有一定的提高,Teflon涂层疏水性最好、摩擦系数最小,但是硬度只有5.2 HV,一次喷涂只能硫化2000~3000次。而渗氮、Cr N涂层处理后表面硬度虽然都有所增加,特别是Cr N涂层,硬度提高到原来的2~3倍,但是Cr N涂层表面粗糙度较大,相对橡胶的摩擦系数达到0.5368,橡胶硫化过程中硫化阻力较大,硫化质量较差。
According to the tire mold processing flow, blasting specimens were prepared, and the surface of the sand blasting specimens was polished, nitrided, CrN-coated and Teflon-coated. According to the analysis of surface properties such as wear resistance, anti-adhesion, easy mold release, easy cleaning, good vulcanization and long service life of the tire mold, the roughness, hardness, hydrophobicity, And other surface integrity parameters measured to compare the different surface treatments on the tire surface integrity of the mold. The results show that the surface hydrophobicity and friction coefficient of Teflon coating increase slightly after polishing and Teflon coating treatment. Teflon coating has the best hydrophobicity and the least friction coefficient, but the hardness is only 5.2 HV. . However, although the surface hardness of nitrided and CrN coatings increased, especially the hardness of CrN coatings increased by 2 ~ 3 times, but the surface roughness of CrN coatings was larger than that of rubbers Coefficient of 0.5368, vulcanization rubber vulcanization process larger resistance, poor quality vulcanization.