Abstract:

For getting better properties of WC matrix composites, the performance such as the rockwell hardness and bending strength, etc. of 30 WC matrix composites, prepared by 10 different formulas, are tested. These samples were manufactured by the vacuum hot-pressing sintering process using intermediate-frequency furnace under the conditions that sintering pressure is 13 MPa, the heating time is 6 min, and the holding time is 5 min. The influence of WC, copper ZQSn663, Mn, Co, and Ni on the hardness and bending strength properties of matrix are investigated by data analysis. The results indicate that WC is the prime factor to influence the hardness and bending strength of matrix. Internal logic exists between the hardness of matrix and bending strength. The matrix with high hardness has high strength, too. To get excellent performance of the matrix, the proportion of elements by weight should be controlled in formula: WC<59.1%, ZQSn663>25%,3%

Key words: WC matrix composites, diamond drills, hot-pressed sintering