Tungsten carbide ball is consists of cobalt alloy ball (YG6X YG6 and YG8 YG10, YG13), while the back of the figure represents the cobalt content, such as: YG6 refers to the CO content is 6%, the remaining 94% WC, there is another kind of tungsten nickel alloy ball (YN6 YN8, YN10, YN12), in the same way at the back of the Numbers represent a nickel. The proportion of two kinds of alloy ball in front of the 14.6 15.1, and those for titanium carbide alloy ball ball, weight is lighter.

Ball tooth bit is a kind of rock drill bit which appears with the development of hydraulic rock drill. It has high working efficiency, fast drilling speed and saves auxiliary working time. It is suitable for fast driving of high-power rock drill. Ball tooth drill bit in the drilling of brittle rock, with the use of high power hydraulic drill, the biggest characteristic is fast and stable chisel, drill bit grinding cycle is long. Since the 1970s, porter company has been researching and developing ball-tooth bit as its main product. Now, the sales volume of various ball-tooth bit accounts for 60% ~ 70% of the total production of the ball-tooth bit. In 1968, after adopting the precision hot-setting technology, sandvik company developed a series of ball-tooth drill bits with large and small diameter for percussion drilling, and recommended the ball-tooth drill head as the "ideal supporting drilling tool for hydraulic rock drill". In the next few years, ball tooth bit will take more and more proportion in rock drilling bit market.

After the 1980s, China began to pay attention to the research and development of ball-tooth bit. In the 1990s, the quantity and quality of domestic ball-tooth drill bits have been greatly developed (table 5), and the export volume is also increasing year by year. A batch of ball tooth bit manufacturers with larger output and better quality appeared, such as lianhuashan, chengtan, changsha mining institute, changjiang river, shaodong and so on. Among them, the ball tooth bit produced by lianhuashan takes a large proportion in the export bit.In the production process of ball tooth bit, high quality carbides of shell steel, high precision processing equipment, reasonable processing technology and heat treatment technology are the preconditions to ensure product quality. The ball tooth bit steel used in foreign brazing tool factory mainly USES chrome-nickel-molybdenum steel or silicon-manganese chrome-nickel-molybdenum steel. In the hard alloy aspect, each factory selects the high quality tungsten carbide ball, like Sweden DP series alloy, Germany GT series alloy and so on.

Related link:

http://www.wococarbide.com/Transaction/en_article_info/id/582.html

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