优点：有较好的韧性， 宝石头部摩擦系数低，具有超长的使用寿命。
Advantages: good toughness, low friction coefficient of the ruby head, long life.
舞钢研制开发的调质钢wh80 Q具有高强度、良好的低温冲击韧性、抗层状撕裂性能、较低的时效敏感性系数。
The quenched and tempered steel WH80Q offers high strength, excellent low temperature impact toughness, lamellar tearing resistance and lower aging sensitivity factor.
介绍了该矿传统掘进凿岩爆破方法，详细阐述了该矿硬韧性岩的巷道掘进炮眼布设及装药系数的确定。
The blasting hole arrangement of hard ductility rocks in the roadway excavation is discussed and explosive loading coefficient is determined.
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