微波烧结硬质合金工艺的升温速度分析

Study on Heating Rate of Microwave Sintering Technology for Cemented Carbides

摘要:

研究WC-11.5Co硬质合金的微波烧结工艺以及升温速度对合金致密度、显微组织、硬度（HRA）的影响。结果表明，微波烧结能够快速制备高致密度、高硬度的硬质合金；在10.4~61.9 ℃/min范围内，升温速度对合金组织和性能未产生明显影响，硬度（HRA）在88.5~89.5之间，高于常规烧结的87.6和牌号为YG11C产品的硬度指标。

Abstract:

Sintering technique via microwave energy for WC-11.5Co cemented carbides and the effect of heating rate on the densification, microstructures and hardness (HRA) were investigated. Cemented carbides with high densification and hardness can be achieved by microwave sintering. Within the heating rate from 10.4 to 61.9 oC/min, it has no visible effect on alloys’ microstructures and properties. The harness ranging from 88.5 to 89.5 is obviously higher than 87.6 of conventionally sintered counterparts and the hardness index of YG11C commercial products.