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多数零件的失效行为,并不是因为零件受到超过其屈服极限的力冲击作用而产生的,而是在小于其屈服应力的载荷反复作用下产生的,因此如何有效提高零件抵抗低应力多冲碰撞能力具有重要的现实意义。通过对0Cr18Ni9试件和具有Ni基激光熔覆涂层的0Cr18Ni9试件进行多碰试验,采用网格坐标法记录材料表面的塑性变形情况。试验结果表明,在远低于材料屈服强度的载荷多次碰撞下,0Cr18Ni9试件和具有Ni基激光熔覆涂层试件都发生可测的塑性变形,且后者的变形量远小于前者。因此对零件采用先进涂层技术,是一种提高零件抗多冲碰撞能力的有效途径。
Most parts of the failure behavior, not because the parts by more than its yield limit of the impact of the force generated, but less than the yield stress of the load repeatedly produced, so how to effectively improve the parts to resist low stress multi-impact ability It has important practical significance. Through the multi-touch test on 0Cr18Ni9 specimen and 0Cr18Ni9 specimen with Ni-based laser cladding layer, the grid surface was used to record the plastic deformation of the material surface. The experimental results show that both the 0Cr18Ni9 specimens and the Ni-based laser cladding coating specimens undergo measurable plastic deformation under load multiple impacts much lower than the yield strength of the material, and the deformation of the latter is far less than the former. Therefore, the use of advanced coating technology for parts, is an effective way to improve the ability of parts against multiple impact collision.