Physical Characteristics of Plasma Cladding Fe-Cr-Nb-Si-Mo Alloy Cladding Layers on Different Substrates
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https: //doi. org/10.1007/s11595-020-2325-2
Physical Characteristics of Plasma Cladding Fe-Cr-Nb-Si-Mo Alloy Cladding Layers on Different Substrates GAO Guijun1, LI Kang1, CHEN Weiwang1, ZHANG Hongbin2, YANG Xiaobing3, ZHANG Hongyu1, LI Junxia1*
(1. College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China; 2. Shandong Province Key Laboratory of Mine Mechanical Engineering, Shandong University of Science and Technology, Qingdao 266590, China; 3. JMC Heavy Duty Vehicle Co., Ltd., Taiyuan 030024, China)
Abstract: A plasma cladding experiment was carried out to investigate the characteristics(surface hardness, microstructure, friction, wear properties from different substrates to the cladding layer and the bond strength) of plasma cladding Fe-Cr-Nb-Si-Mo alloy cladding layers on different substrates. In order to improve the abrasion resistance of the scraper middle trough, the plasma cladding technique was used to clad the alloy ceramic powder Ig7 on the surface of the middle trough NM450, WH60A, Hardox450, and Weartuf450 to create Fe/Cr/Nb/Mo/ V cladding layer. Based on the experiment results, the microstructure, friction and wear properties of the four cladding layers were analyzed, and the bond strength between the cladding layer and the substrate was also tested. The experimental results show that the main phases of the four cladding layers are martensite and all kinds of metal carbides ((Nb, Mo)C, VC, and Cr7C3). WH60A surface cladding layer has shown good friction and wear properties. Key words: plasma cladding; organization structure; microhardness; bond strength
1 Introduction The scraper conveyor is a key equipment for a fully mechanized mining face, and is a commonly used transportation device in coal mine production[1,2]. Its middle trough, which is used to bear the coal bulk materials, is prone to wear since it bears huge load (such as extrusion force and shock force) and has friction with scraper, chain, coal gangue and other parts under working condition, the efficiency of the resistance of the middle trough, thus, improving the wear resistance of the middle trough is of great significance[3,4]. In production, so ting point. To this end, this paper studies the new cladding layer experimental method to explore the wear resistance. By adding large © Wuhan University of Technology and Springer-Verlag GmbH Germany, Part of Springer Nature 2020 (Received: Apr. 26, 2019; Accepted: July 12, 2019) GAO Guijun(高贵军):E-mail: [email protected] *Corresponding author: LI Junxia(李军霞): Prof.; Ph D; E-mail: [email protected] Funded by the NSFC-Shanxi Coal Based Low Carbon Joint Fund Focused on Supporting Project (No. U1510205), the Shandong Province Key Laboratory of Mine Mechanical Engineering(No.2019KLMM210) and the Key Research and Development (R&D) Projects of Shanxi Province (No.201903D121065)
amounts of carbon and carbide forming elements to the alloy powder, the hardness and wear resistance of the alloy can be improved. Forming elements with the combination of c
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