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分析美标道岔垫板开裂的原因

发布时间 : 2018-06-13    
     美标道岔垫板是道岔垫板中的一种,也是我公司的主营产品之一。虽然在整个道岔结构中,美标道岔垫板在其中起到非常重要的作用,但是在使用期间,美标道岔垫板也会发生各种各样的故障,影响道岔的行车安全,当美标道岔垫板严重损坏时则需要进行及时更换。除此之外,开裂也是美标道岔垫板常见问题之一,为了避免此类情况频繁出现,除了要进行定期检查及保养外,还需要分析出美标道岔垫板开裂的原因,进而采取相应的防范措施。那么,导致美标道岔垫板开裂的原因有哪些呢,我公司将针对这个问题简单讲解?br />      从道岔垫板底板的化学成分来看,基本满足标准值,但元素含量均接近或达到标准值上限,特别是硫含量达到0.043%。各种厚度的钢板都存在有层状撕裂的倾向,在发生层状撕裂的钢材中,含硫量大多高于0.02%。硫含量较高是导致层状撕裂的一个诱因?br />      从道岔垫板底板的显微组织来看,宏观组织和微观组织均存在明显的中心偏析,对于热轧钢板来说,这是不可避免的,但这对钢板厚度方向的力学性能影响是显著的。在轧制过程中,具有一定塑性的非金属夹杂物平行于轧制方向的平面,呈带状或链状分布。夹杂物的这种分布形态,使钢板在厚度方向上的强度与形变能力急剧降低。另外,中心偏析层出现少量贝氏体组织在一定程度上对钢板在厚度方向上的形变能力也有不良影响?br />

     从道岔垫板的结构上来看,挡板和台板通过焊接与底板单面结合。在这种焊接结构中,单面承受着较大的热流,两面存在较大的温差,焊接残余应力及热应力较高,在底板厚度方向上裂纹就在夹杂物和组织偏析的钢板厚度中心层萌生,并发展成具有阶梯形貌的层状撕裂,直至开裂?

     以上就是导致美标道岔垫板开裂的原因,希望大家能够在了解过导致道岔垫板开裂的原因后,可以通过采取相应的防范措施,有效避免道岔垫板开裂。当然,如果您对美标道岔垫板有兴趣,无论是想要了解更多相关信息,或是想要购买美标道岔垫板,及其它种类的铁路配件,都可以与我公司联系?br />

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