硼含量对高硼铁基耐磨合金组织和性能的影响 学位论文.doc

硼含量对高硼铁基耐磨合金组织和性能的影响 摘 要 高硼铁基耐磨合金具有硼化物的硬度高和热稳定性良好以及合金元素加入量少和生产成本低且工艺简单的优势，它在未来的耐磨材料领域有着广泛的应用前景。高硼铁基耐磨合金中硼元素主要以硼化物形式存在，硼化物代替传统铁基耐磨合金中的碳化物作为耐磨相，用硼化物替代碳化物后，由于碳已不是形成耐磨相的元素，所以可以大大降低其加入量，得到含碳量较低的基体，因而在保证铸铁具有良好耐磨相的同时，还具有强韧性的基体，得到性能更好的耐磨材料。因此，研究和开发高硼铁基耐磨合金对经济发展有着重要的意义。 本文以高硼铁基耐磨合金的成分优化为研究目标，通过优化配比，根据力学性能测试和金相组织分析，考察合金最优性能并得出最优的组合。研究结果表明，经过优化设计后的高硼铁基耐磨合金的成分（wt%）为：0.36%C、3.5%B、1.0% Si、1.0% Mn、1.0% Cu、1.5% Cr、0.5%VAbstract High-boron iron-based wear-resistant alloy with high hardness of boride and good thermal stability and adding alloying elements, and low production cost less and the advantages of simple process, wear-resistant materials in the future it has wide application prospects. High-boron iron-based wear-resistant alloy of boron exists mainly borides, boride instead of the traditional iron-based wear-resistant alloy as a wear-resistant carbide phase, boron carbide replacement, due to the formation of wear-resistant carbon is not phase elements, can greatly reduce their dosage, have a lower carbon content of the matrix, thus ensuring a good wear-resistant cast iron phase, it is also the matrix with high toughness, wear-resistant materials have better performance. Therefore, the research and development of high-boron iron-based wear-resistant alloy have great significance on the economic development. In this paper, high-boron iron-based wear-resistant alloy composition optimization is the research objectives by optimizing the ratio of the test based on the mechanical properties and microstructure, as well as the best optimal performance alloy combination was studied. The results show that the optimized design of high-boron iron-based post-wear-resistant alloy composition (wt%) was: 0.36% C，3.5% B, 1.0% Si, 1.0% Mn , 1.0% Cu, 1.5% Cr，0.5% V, than for the Fe. At this point the best overall performance alloys, both high strength, hardness and wear resistance, has a certain plasticity and toughness. Keywords: High-boron alloy Boride Wear resistance Wear-resistant mate