冷却过程对熔铸铜钢双金属复合材料机械和摩擦学性能影响的研究

Pub Date : 2024-07-04 DOI:10.5755/j02.ms.36016
Xiaoliang Fang, Yanguo Yin, Shan Huang, Ming Xu, Jilin Miao, Rongrong Li
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引用次数: 0

摘要

采用熔铸复合法制备了 ZCuPb15Sn5/1045 双金属复合材料。研究了铜钢双金属复合材料在不同冷却工艺条件下的力学性能和摩擦学性能。结果表明,随着冷却速度的加快,铜钢双金属复合材料的铜层变得更硬,晶粒变得更细,抗摩擦元素 Pb 的分布变得更均匀。在水下冷却条件下,剪切强度增加,剪切断裂逐渐呈现出韧脆断裂的趋势。冷却过程对材料的摩擦学性能影响更大。冷却速度较慢时,双金属复合材料的铜层摩擦系数较大,粘着磨损和氧化磨损相对严重。而对于冷却速度极快的水冷样品,铜层的摩擦系数较低,磨损程度相对较轻。
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Study on Effects of Cooling Process on Mechanical and Tribological Properties of Melt-casting Copper-Steel Bimetallic Composites
The ZCuPb15Sn5/1045 bimetallic composites were prepared by the melt-casting composite method. The mechanical and tribological properties of the copper-steel bimetallic composites under different cooling process conditions were studied. The results showed that with the acceleration of the cooling rate, the copper layer of the copper-steel bimetallic composite became harder, the grain became finer, and the distribution of the anti-friction element Pb became more uniform. Underwater cooling conditions, the shear strength increased, and the shear fracture gradually showed the tendency of tough and brittle fracture. The cooling process had a more significant influence on the tribological properties of the material. When the cooling rate was slow, the copper layer of the bimetallic composites had a high friction coefficient and relatively serious adhesive wear and oxidation wear. For the water cooling sample with a very fast cooling rate, the friction coefficient of the copper layer was low and the wear degree was relatively light.
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