Fe60Co8Zr10Mo5W2B15块体非晶合金的形成及热处理对性能的影响研究

用铜模吸铸法获得直径为2mm的Fe60Co8Zr10Mo5W2B15和Fe60Co8Zr10Mo5W2B15块体非晶合金。采用X射线衍射（XRD）、示差扫描量热分析（DSC）、显微硬度及压缩实验等研究了非晶合金的结构、热稳定性及热处理前后的显微硬度与压缩性能。结果表明Nb的引入不利于非晶合金的形成；Fe60Co8Zr10Mo5W2B15非晶合金的显微硬度为1343HV0．2，抗压强度σbe为972．6MPa；在低于晶化起始温度的热处理，硬度稍有下降；但在高于晶化峰值温度的热处理，硬度值随时间变化先升高，后下降；在热处理时间相同的条件下，随着热处理温度的升高，合金的硬度升高，但压缩强度会明显下降。

Formation of Fe60Co8Zr10Mo5W2B15 bulk amorphous alloy and influences of subsequent heat treatment on the properties

Bulk amorphous rods, Fe60Co8Zr10Mo5W2B15 and Fe60Co8Zr10Mo5W2B15, with a diameter of 2ram have been obtained by using copper mould suction cast. For Fe60Co8Zr10Mo5W2B15, the structure, thermal stability, and the micro-hardness and compression strength before and after annealed, have been investigated by Xray diffraction, differential scanning calorimetry, micro-hardness and compression tests. A small addition of niobium replacing with zirconium is not beneficial for improving glass-forming ability. Fe60Co8Zr10Mo5W2B15 bulk amorphous alloy shows microhardness about 1343HV0.2 and compression strength about 972. 6MPa. As annealed below the onset of crystallization temperature, the hardness decreases slightly. However annealed above the peak of crystallization temperature, the hardness will first increase and then gradually decline with the elongation of annealing time. Furthermore, annealed for the same period of time, the microhardness will increase with the rise of annealing temperature, while the compression strength will apparently decrease.