Q235碳钢实验室固体渗硼技术.doc

Q235碳钢实验室固体渗硼技术 摘 要 讲述了固体渗硼技术的发展历史、研究现状及其发展趋势。也讲到了固体渗硼技术在提高Q235碳钢表面硬度、抗拉性、耐磨性等性能的特殊作用及意义。在讲述的过程中，通过比较高的理论水平对固体渗硼原理、渗硼层形成机理、组织特点等方面也作了详细的介绍。简单介绍了，渗硼件的各种性能的检测方法，重点设计了完整的Q235碳钢实验室固体渗硼技术的实验方案，以探讨Q235碳钢的最优加热温度和保温时间。 通过对在实验中得到的数据的整理，获得了以下两个重要结论：Q235碳钢加热温度在800~900℃之间，保温2~6 h后，渗硼层厚度为38~234μm，渗硼层显微硬度为801.9~2425HV，渗层的形貌为锯齿状。在接近表面的地方，存在孔洞和微裂纹并且渗硼层为单相的Fe2B相。渗硼层厚度δ与加热温度T和保温时间t的关系曲线图。对实际生产和教学实验都有现实的参考和指导意义。 实验中所利用的金相显微镜、X射线衍射仪、万能试验机等现代仪器，对以后的材料性能检测手段的发展都有重要的指引作用。 关键词：固体渗硼原理；性能检测；渗硼试样；渗硼层厚度；渗硼层显微硬度；抗拉强度。 Solid Q235-boronizing Technology in Laboratory Abstract Describe the technology development of solid boride history, current situation and development trend. Also talk about the solid boride in improving Q235 carbon steel’s surface hardness, tensile strength, abrasion resistance and other properties of the special role and significance. In this process, it described boride layer formation mechanism and organizational characteristics by the theory of higher level principles of solid boride in detail. Briefly introduce detection methods of various properties of boride parts, focusing on design of a complete solid boride Q235-technology laboratory experimental program to explore the optimal Q235 carbon steel heating temperature and holding time. By sorting the data obtained from experiments. We got the following some important conclusions: Q235 carbon steel heating temperature between 800 ~ 900 ℃, keeping warmth between 2 ~ 6 h, then got the boride layer thickness of 38 ~ 234μm, hardness of boride layer was 801.9 ~ 2425HV and layer morphology was jagged. Near the surface where there is micro-cracks and holes and single-phase boride layer of Fe2B phase. Boride layer thickness (δ) and the heating temperature (T) and holding time (t) relationship graph. These have a significance of realistic reference and guidance to actual production and teaching experiment. Experiments in the use of Metallurgical Microscope, X-ray diffraction, universal testing machine and other modern equipment wi