董 飞 1 ，刘福田 2 ，刘元新 1 ，马振珠 1
(1. 中国建筑材料科学研究总院，中国建筑材料检验认证中心，北京 100024 ； 2. 济南大学材料科学与工程学院，济南 250022)
PROPERTIES OF TERNARY BORIDE HARD ALLOY CLADDING MATERIAL PREPARED BY THE LIQUID SINTERING TECHNIQUE
DONG Fei1 ， LIU Futian2 ， LIU Yuanxin1 ， MA Zhenzhu1
(1. China Building Materials Test and Certification Center, China Building Materials Academy, Beijing 100024;
2. School of Materials Science and Engineering, Jinan University, Jinan 250022,China)
Abstract: A ternary boride hard alloy was prepared on Q235 steel substrate surface to form a new type of cladding material with excellent wear and corrosion resistance by in situ reaction and liquid phase sintering in a vacuum furnace. The microstructure and element distribution of the cladding-substrate interface area were studied using a scanning electron microscope and energy dispersion spectrometer. An interim layer with a certain width between the hard alloy cladding and steel substrate with good metallurgy coalescence between the two phases is formed, where the distribution of elements continuously changes. The microhardness, bending strength and wear resistance of the cladding material were studied. The experimental results indicate that the Vickers hardness of the cladding material is 12MPa; the bending strength is about 86.74 MPa in tensile stress and 1168.21 MPa in compress stress, when it was sintered at 1200 ℃ , and the wear resistance of the cladding material is more excellent than Q235 steel.
Key words: liquid phase sintering; ternary boride hard alloy; cladding material ； wear resistance property
摘 要：采用原位反应真空液相烧结技术，在 Q235 钢基体表面制备三元硼化物硬质合金覆层，使钢基体表面获得耐磨抗蚀、界面结合强度高的覆层材料。利用扫描电镜和能谱分析对三元硼化物硬质合金和钢基体的界面微观结构和界面区元素分布进行了分析，发现硬质合金覆层和钢基体之间形成了一个具有一定厚度的过渡层，合金元素浓度没有发生突变，两相之间形成了良好的冶金结合。研究了覆层材料的显微硬度、抗弯强度与耐磨性能，结果表明：在 1200 ℃烧结，覆层的 Vickers 硬度达到 12MPa ，弯曲强度在试样受到拉伸应力与压缩应力时分别达到 86.74MPa ， 1168.21MPa ，耐磨性与 Q235 钢相比有了较大提高。
关键词：液相烧结；三元硼化物硬质合金；覆层材料；耐磨性能
制造涂层和覆层材料，即：采用表面改性和表面强化技术提高金属材料的表面抗磨损和抗腐蚀性能的新技术已成为一个研究热点 [1] 。制造涂层和覆层材料主要工艺有：热喷涂技术 [2] 、激光熔覆技术 [3 4] 、溶胶 – 凝胶技术 [5] 、自蔓延高温合成技术 [6 '">............
