MICROSTRUCTURAL EFFECTS ON THE SLIDING WEAR-RESISTANCE OF A COBALT-BASED ALLOY
MICROSTRUCTURAL EFFECTS ON THE SLIDING WEAR-RESISTANCE OF A COBALT-BASED ALLOY
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DOI：
10.1016/0043-1648(94)90089-2
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发表时间：
1994-05-01
期刊：
影响因子：
5
通讯作者：
KURZ, W
中科院分区：
文献类型：
--
作者：
FRENK, A;KURZ, W
在堆焊合金发生严重金属磨损的条件下，研究了组织对亚共晶钨铬钴合金干滑动磨损性能的影响。采用常规的冷态铸造和激光表面熔覆制备了多种凝固组织。合金的硬度在很大程度上取决于微观组织，特别是枝晶的大小。在所研究的滑动条件下，钨钴合金发生了严重的脱层磨损。测量了高摩擦系数，由此产生的应力循环完全破坏了地下结构。因此，在固定磨损状态下，磨损速率与凝固态微观组织没有关系。然而，合金元素对基体的耐磨性有很大的影响，从而影响基体的性能。提出了在类似滑动条件下提高该类合金耐磨性的建议。
The influence of the microstructure on the dry sliding wear resistance of a hypo-eutectic Stellite 6 alloy was investigated under conditions leading to severe metallic wear of the hardfacing alloy. Conventional chill casting as well as laser surface cladding were used to produce a wide range of solidification microstructures. The hardness of the alloy was strongly dependent on the microstructure and in particular on the size of the dendrites. Under the sliding conditions investigated, severe delamination wear of the Stellite occurred. High coefficients of friction were measured and the structure in the subsurface was completely destroyed by the resulting stress cycles. During the stationary wear regime, no dependence of the wear rate on the as-solidified microstructure could therefore be determined. However, a strong influence on the wear resistance of alloying elements which affect the matrix properties was observed. Suggestions are made for the improvement of the wear resistance of such alloys under similar sliding conditions.