Abstract

Fretting damage under high temperature corrosion and wear condition is one of the main factors that cause the failure of the key parts of mechanical and electrical equipment, and laser cladding wear-resistant and corrosion-resistant coating is the main technology to repair these failure key parts. In this paper, the layered 50Cr₆Ni₂/Stellite X-40 multi-material was prepared by direct laser deposition (DLD) using wear-resistant Fe-based alloy and corrosion-resistant Co-based alloy, to meet the needs of repair and remanufacturing of key parts with fretting damage. The results show that the layered 50Cr₆Ni₂/Stellite X-40 composite material retains their respective microstructures and excellent properties. The microstructure of the 50Cr₆Ni₂ layer mainly contains martensite and granular bainite, the microstructure of the Stellite X-40 layer consists of dendrite and eutectic structure. The layered 50Cr₆Ni₂/Stellite X-40 composite material has both good wear resistance (wear mass loss is 1.0 mg) and good corrosion resistance (− 0.37549 of E_corr and 0.00032 of i_corr). The DLD layered 50Cr₆Ni₂/Stellite X-40 composite material could meet the demand of short stress path rolling mill remanufacturing.

Graphic Abstract

In order to meet the needs of repair and remanufacturing of key parts with fretting damage, the layered 50Cr₆Ni₂/Stellite X-40 multi-material was prepared by direct laser deposition (DLD) using wear-resistant Fe-based alloy and corrosion-resistant Co-based alloy. As shown in Fig. 1a, the samples were fabricated by using the DLD system. Figure 1b, c shows the EBSD analysis of the layered 50Cr₆Ni₂/Stellite X-40 multi-material at the interface, which clearly displays the existence of the interface. In some regions, blocky retained austenite can be found (Fig. 1d), and it can be clearly observed that the substructure within granular bainite are sheaves with lath-shaped in Fig. 1e. In the 50Cr₆Ni₂ layer of layered multi-material, the microstructure mainly contained martensite (Fig. 1f, g). Figure 1h, i show that the layered 50Cr₆Ni₂/Stellite X-40 composite material has both good wear resistance and good corrosion resistance. The results show that the layered 50Cr₆Ni₂/Stellite X-40 composite material retains their respective microstructures and excellent properties, and it could meet the demand of short stress path rolling mill remanufacturing. Layered 50Cr₆Ni₂/Stellite X-40 multi-material fabricated by direct laser deposition: characterization and properties (Fig. 1).

中文翻译：

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直接激光沉积制备的多层50Cr6Ni2 / Stellite X-40复合材料：表征和性能

摘要

高温腐蚀和磨损条件下的微动损伤是导致机电设备关键零件失效的主要因素之一，而激光熔覆耐磨耐腐蚀涂层是修复这些故障关键零件的主要技术。 。本文采用耐磨的铁基合金和耐腐蚀的钴基合金通过直接激光沉积（DLD）制备了层状的50Cr ₆ Ni ₂ / Stellite X-40复合材料，以满足修复的需要。并重新制造具有微动损坏的关键零件。结果表明，层状50Cr ₆ Ni ₂ / Stellite X-40复合材料保留了它们各自的微观结构和优异的性能。50Cr的微观结构₆ Ni ₂层主要包含马氏体和粒状贝氏体，Stellite X-40层的微观结构由枝晶和共晶结构组成。层状的50Cr ₆ Ni ₂ / Stellite X-40复合材料具有良好的耐磨性（磨损质量损失为1.0 mg）和良好的耐腐蚀性（E _corr的-0.37549和i _corr的0.00032 ）。DLD层状的50Cr ₆ Ni ₂ / Stellite X-40复合材料可以满足短应力路径轧机再制造的需求。

图形摘要

为了满足具有微动损伤的关键零件的维修和再制造的需要，采用耐磨的铁基合金和腐蚀液通过直接激光沉积（DLD）制备了层状的50Cr ₆ Ni ₂ / Stellite X-40多层材料耐钴基合金。如图1a所示，通过使用DLD系统来制造样品。图1 B，C示出的的EBSD分析层状50Cr ₆的Ni ₂ /钨铬钴合金X-40多材料在界面处，这清楚地显示了接口的存在。在某些地区，可以发现块状残余奥氏体（图1）。d），它可以清楚地观察到，粒状贝氏体内的子结构是具有板条状图滑轮1个即 在50Cr ₆的Ni ₂层的层状多材料的，微结构主要包含马氏体（图1个F，G）。从图1 h中可以看出，层状50Cr ₆ Ni ₂ / Stellite X-40复合材料既具有良好的耐磨性，又具有良好的耐腐蚀性。结果表明，层状50Cr ₆ Ni ₂ / Stellite X-40复合材料保留了各自的微观结构和优异的性能，可以满足短应力路径轧机再制造的需求。层状50Cr通过直接激光沉积制备的₆ Ni ₂ / Stellite X-40多材料：表征和性能（图1）。