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用三点弯曲试验,研究了室温～1000℃下Co含量、碳化物粒度和粘结相粒度等因素对WC-(10～30)％Co硬质合金变形特性的影响。实验结果表明:Co含量一定时,约在800℃以上碳化物粒度越粗的合金,约在600℃以上粘结相粒度越粗的合金,越难以变形。在分别低于上述温度时这些现象相反。还表明,在一定温度下,载荷-挠度曲线越陡,合金的抗弯强度一般也越高。
The three-point bending test was used to study the effect of Co content, carbide size and binder phase size on the deformation of WC- (10-30%) Co cemented carbide at room temperature to 1000 ℃. The experimental results show that when the content of Co is constant, the alloy with the coarse carbide particle size above about 800 ℃ and the alloy with coarse particle size above 600 ℃ are more difficult to deform. These phenomena are opposite at the temperatures below respectively. It also shows that at a certain temperature, the steeper the load-deflection curve, the higher the flexural strength of the alloy is generally.