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1.前言在破岩刀具上堆焊碳化钨(WC)硬质合金颗粒耐磨层已得到应用,如竖井钻机楔齿滚刀,全断面岩巷掘进机的盘形滚刀等。但由于缺乏对堆焊层的组织结构,WC颗粒在施焊过程中的冶金过程作深层的研究,使得堆焊后的刀具的耐磨性并不很高。研究其原因,关键在于施焊过程中WC颗粒的熔化烧损,使其有效尺寸减小和丧失应有的高硬度。笔者经过多年试验,从碳化钨颗粒的化学成份、堆焊过程中火焰对碳化钨颗粒的影响及淬火温度对颗粒硬度、耐磨性的作用等方面进行了研究和试验,使这项技
1. Foreword The tungsten carbide (WC) cemented carbide hardfacing layer has been applied to broken rock tools, such as wedge hobs for shaft drills and disc cutters for full face rock tunnel boring machines. However, due to the lack of the organizational structure of the surfacing layer, WC particles in the process of metallurgical process for deep research, making the wear resistance of the tool after surfacing is not very high. To study the reason, the key lies in the melting process of WC particles melting loss, so that the effective size reduction and loss of due high hardness. The author after years of experiments, from the chemical composition of tungsten carbide particles, welding process of tungsten carbide particles and the influence of quenching temperature on the hardness of the particles, the role of wear resistance and other aspects of the study and testing, so that this technology