Cemented Carbide Blades Wear Characteristics In Drilling LimestoneⅢ

2. Materials and experimental procedures

2.1. Materials

The blade material of drill bit is WC/Co cemented carbide YG6 (6%Co, 94%WC), whose mechanical properties are listed in Table 1. The installation of the blade and water jet nozzle are shown in Fig. 1. The sizes of the blades are listed in Table 2.

Limestone (taken from Songzao Mine in southwest China) is drilled as hard rock material in the experiment. The properties of the limestone are listed in Table 3, and the SEM micrograph of it is shown in Fig. 2

2.2. Experimental procedures

The experiments were performed at room temperature. The drill rig kept the drilling speed at 120 mm/min and rolling speed at 70 rounds/min for 30 min in the experiments, which aimed to investigate the influence of different water jet parameters (jet pressure, nozzle diameter) on the wear characteristics of the cemented carbide blades(m0):R=mx/m0

The weight of blades was measured with a balance (minimum 0.01 mg) made by Mettler Toledo. For the determination of wear mechanisms, the wear surfaces were analyzed by scanning electron

microscope made by TESCAN

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

• < Prev
• Next >