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首页> 美国卫生研究院文献>Materials >Effect of Deep Cryogenic Treatment on Microstructure and Wear Resistance of LC3530 Fe-Based Laser Cladding Coating
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Effect of Deep Cryogenic Treatment on Microstructure and Wear Resistance of LC3530 Fe-Based Laser Cladding Coating

机译：深冷处理对LC3530铁基激光熔覆层组织和耐磨性的影响

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摘要

The effect of deep cryogenic treatment on microstructure and wear resistance of LC3530 Fe-based powder laser cladding coating was investigated in this paper. The cladding coating was subjected to deep cryogenic treatment for the different holding times of 3, 6, 9, 12, and 24 h, followed by tempering at room temperature. Microstructure of the cladding coating was observed by optical microscope (OM) and the microhardness was measured by the Vickers-hardness tester. The wear was tested by ball and flat surface grinding testing conducted on the material surface comprehensive performance tester. The wear scars were analyzed using a non-contact optical surface profiler and scanning electron microscope (SEM). The results showed the grain size of cladding coating after 12 h of deep cryogenic treatment was significantly reduced by 36.50% compared to the non-cryogenically treated cladding coating, and the microhardness value increased by approximately 34%. According to the wear coefficient calculated by the Archard model, the wear resistance improved about five times and the wear mechanism was micro-ploughing. The deep cryogenic treatment could enhance the wear resistance of the cladding coating by forming a wear resistant alloy compound and higher surface microhardness.
机译：研究了深冷处理对LC3530铁基粉末激光熔覆层组织和耐磨性的影响。对覆层进行3、6、9、12和24小时的不同保温时间的深低温处理，然后在室温下回火。用光学显微镜（OM）观察包层的显微组织，并用维氏硬度计测量显微硬度。通过在材料表面综合性能测试仪上进行的球磨和平面磨削测试来测试磨损。使用非接触式光学表面轮廓仪和扫描电子显微镜（SEM）分析磨损痕迹。结果表明，与未深冷处理的覆层相比，深冷处理12 h后覆层的晶粒尺寸显着降低了36.50％，显微硬度值提高了约34％。根据Archard模型计算出的磨损系数，耐磨性提高了约5倍，磨损机理为微犁。深低温处理可以通过形成耐磨合金化合物和更高的表面显微硬度来提高覆层的耐磨性。

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