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Preparation of high performance Fe-based amorphous coating by resistance seam welding
Surface & Coatings Technology ( IF 5.4 ) Pub Date : 2021-01-02 , DOI: 10.1016/j.surfcoat.2020.126813
Changgui Pan , Rui Zhang , De Wang , Yulong Li , Tomiko Yamaguchi , Xiaofei Fan , Dechao Zhao , Wenqin Wang

High performance Fe-based amorphous coatings were first fabricated on 304 stainless steel by resistance seam welding. The microstructure, microhardness, wear and corrosion resistance of the coatings under different welding current were systematically studied. The coatings consisted of amorphous phase and crystalline phases of M23C6, Fe3C and α-Fe. Moreover, coating formation mechanism was characterized by welding temperature and microstructure variation of powders at different welding current. The dense amorphous coating was fabricated at about 750 K in welding current of 24 A and was seriously crystallized at 990 K in 30 A. The optimal hardness and wear rate of the coating reached 1280 HV0.1 and 2.71 × 10−6 mm3/N·m, respectively, which exhibited better performance compared with the amorphous coating fabricated by the traditional methods. In 3.5 wt% NaCl solution, the corrosion resistance of all coatings was superior to that of the substrate, and corrosion occurred in the crystallization regions. As the welding current increased, the amorphous rate in the coating decreased, resulting in a decrease in the hardness, wear resistance and corrosion resistance of the coating.



中文翻译:

电阻缝焊接制备高性能铁基非晶态涂层

高性能铁基非晶涂层首先通过电阻缝焊在304不锈钢上制造。系统地研究了不同焊接电流条件下涂层的组织,显微硬度,耐磨性和耐蚀性。涂层由M 23 C 6,Fe 3 C和α-Fe的非晶相和结晶相组成。此外,通过不同的焊接电流下的焊接温度和粉末组织变化来表征涂层的形成机理。在24 A的焊接电流下以约750 K的密度制造出致密的非晶态涂层,并在30 A的990 K下严重结晶。该涂层的最佳硬度和磨损率分别为1280 HV 0.1和2.71×10 -6与传统方法制得的非晶态涂层相比, mm 3 / N·m表现出更好的性能。在3.5 wt%的NaCl溶液中,所有涂层的耐蚀性均优于基材,并且在结晶区发生腐蚀。随着焊接电流的增加,涂层中的非晶率降低,导致涂层的硬度,耐磨性和耐腐蚀性降低。

更新日期:2021-01-13
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