矿山小铁路道岔在强烈的冲击和摩擦力作用下服役,道岔应能承受较高的交变载荷和冲击载荷与强烈的摩擦力,以及在偏载负荷作用下受到强烈的弯曲应力作用。为此道岔应有适宜的硬度、刚性和强韧性和较高的接触疲劳强度。众所周知,对低碳合金钢进行高温加热急冷淬火可获得硬度适中、刚性好、强韧性高的低碳板条马氏体组织;因钢中碳元素在淬火时 The small railway turnout is under the action of strong impact and friction. The switch should be able to withstand high alternating load, impact load and strong friction as well as strong bending stress under partial load. For this switch should have appropriate hardness, rigidity and toughness and high contact fatigue strength. As we all know, for low-carbon alloy quenching high-temperature heating quenching available moderate hardness, good toughness and low-carbon lath martensite; carbon steel in the quenching