放电等离子烧结法制备三元硼化物基耐磨覆层材料的研究
Study on Preparation of Ternary Boride Based Wear Resistant Cladding Material by Spark Plasma Sintering
金亚旭1, 田玉明1, 周兴华2
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作者单位：1. 太原科技大学 材料科学与工程学院, 山西 太原 030024; 2. 武汉理工大学 材料科学与工程学院, 湖北 武汉 430070)
中文关键字：三元硼化物； 覆层材料； 放电等离子烧结； 磨损
英文关键字：ternary boride; cladding material; spark plasma sintering; abrasion
中文摘要：研究了在H13钢表面采用放电等离子烧结法制备Mo2FeB2系三元硼化物基金属陶瓷覆层的组织及耐磨性，分析了覆层与钢基底界面形成的特点，覆层的硬度分布及磨损机制。 结果表明，在1050 ℃烧结，保温5 min时，可获得相对密度为99.2%的三元硼化物(Mo2FeB2)基金属陶瓷覆层，显微硬度达1400 HV，覆层和钢基体的结合处存在一个过渡层。由于硬质相的抗磨作用得到充分发挥，该覆层具有良好的耐磨性。
英文摘要：A type of ternary boride based wear resistance cladding material with Mo, Fe and ferroboron powders as raw materials was prepared on H13 steel substrate surface by spark plasma sintering. The morphology, component, hardness and wear performance of the cladding materials were investigated. The results indicate that the main phase composition of the cladding materials is Mo2FeB2 hard phase and α-Fe bonding phase. The relative density of the cladding materials is 99.2% and hardness is up to 1400 HV when sintered at 1050 ℃. There is a transitional zone which becomes a firm metallurgical bonding between cladding and steel substrate .The cladding material has excellent wear resistance.