论文部分内容阅读
采用固体渗硼的方法,将试样在850、950和1050℃条件下分别保温处理2、4、6和8 h,对制备的渗层进行组织观察与性能测试。对M50轴承钢渗硼处理的生长动力学与力学性能进行分析。结果表明,渗硼层具有光滑致密的形貌;渗层的相成分主要是FeB、Fe_2B与Mo_2B;渗层的硬度为400~1630HV;根据处理温度与保温时间的不同,渗层的厚度变化为6～140μm。通过Arrhenius公式,对渗层生长动力学方程进行了推导,渗层的扩散激活能为282.64 kJ/mol。
The samples were incubated at 850, 950 and 1050 ℃ for 2, 4, 6 and 8 h respectively by solid borosilicate method. The microstructure and properties of the prepared implants were observed. The growth kinetics and mechanical properties of borosilicate M50 bearing steel were analyzed. The results show that the boronizing layer has a smooth and compact morphology. The phase components of the layer are mainly FeB, Fe_2B and Mo_2B. The hardness of the layer is 400 ~ 1630HV. According to the different treatment temperature and holding time, the thickness of the layer changes 6 to 140 μm. By Arrhenius formula, the kinetic equation of the layer growth was deduced. The diffusion activation energy of the layer was 282.64 kJ / mol.