煤矿镐形截齿的失效形式与对策

镐形截齿是目前国内外采煤及掘进机械上使用最广泛的一种切割工具.镐形截齿的各种失效形式中磨损失效占比最大约为80%～90%而其他形式失效仅占10%～20%,由于传统截齿硬质合金刀头与支承硬质合金刀头的齿体在硬度和耐磨性上差异过大使得实际使用中硬质合金刀头只产生较少磨损而支撑硬质合金刀头的齿体部分却产生了大量磨损支承强度急剧下降最终导致硬质合金刀头脱落是镐形截齿磨损失效的主要原因.在诸多提高截齿使用寿命的措施中分段复合镐形截齿是一种较有发展前途的新型截齿生产制造技术.

Failure Modes and Solutions of the Mining Round Shaft Chisel

One of the most worldwide-spread cutting tools in coal mining machinery is round shaft chisel which takes 80%~90% of wear failures and 10%~20% of other failures among various failure modes.The primary reason for wear failure of round shaft chisel is that heavy wear and tear of the chisel body breaks itself off when the hard alloy chisel tip is less wore.The sectional composite round shaft chisel,among many solutions lengthening the service life,is a new manufacturing technique which possesses prospective future.