【摘要】 本文根据四川泸沽铁矿极坚韧富铁矿石的攻关试验结果,提出了极坚韧岩石条件下中小钎头硬质合金片(齿)设计的“单片(齿)体积(截面)效应”原理,和极坚韧岩石专用钎头(特重型)发展方向的设想。更多还原

【Abstract】 Based on the industrial drilling test results of extreme tough and high-grade iron ore in Lugu, Sichuan province, the authors have put "the effect of single chip ( button) volume or cross-section" theory of hardmetal chip ( button ) designed for the middle and small diameter bit in the conditions of extreme tough rock, and the assumption of development direction to special heavy-duty bit in extreme tough rock.更多还原