井下钻具碳化钨强化材料进展

Development of WC Hardening Materials for Undermine Drilling Tools

参考国内外有关文献及笔者所做的一些试验，系统地总结了７０年代以来井下钻只碳化钨强化材料的进展情况。在钢齿牙轮钻头强化材料中，详细地分析了铸造碳化钨堆焊层产生龟裂、脱落和断齿的原因。用各种实验数据证明了ＹＭ合金、烧结碳化钨及贴面硬质合金和球粒硬质合金等新型强化材料用于井下各种钻具的效果。

The paper has summerized the development of WC Hardening material for undermine drilling tools since 1970s with reference to some literatures both at home and abroad and on the basis of some tests made by the writer. Detailed analysis is made of the reasons why fissures,peeling-off, and tooth breaking exist in the build-up welding layer of cast WC for hardening material of steel-toothed gear drills. The effectiiveness of new hardening materials such as YM alloy, sintered WC, veneered hard alloy and nodular hard alloy is well demonstrated from various test datum.