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Rock bolts made of high strength steel tubes and their manufacturing process
Rock bolts made of high strength steel tubes and their manufacturing process
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机译:高强度钢管制地脚螺栓及其制造工艺
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摘要
A high strength steel tube rock bolt comprising a main body of expansive rock bolt made from a shaped tube having one or more concavities extending along an axial direction, the shaped tube being formed forming a sheet of high strength steel having a thickness of 1.8-2.3 mm, a tensile strength of 490-640 N / mm2 and an elongation of 20% or more.
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机译:一种高强度钢管岩石螺栓,包括膨胀型岩石螺栓主体,该膨胀岩石螺栓主体由具有一个或多个沿轴向方向延伸的凹面的成型管制成,该成型管形成为厚度为1.8-2.3的高强度钢板。 mm,抗拉强度为490-640 N / mm2,伸长率为20%或更高。
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