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Journal of Central South University

, Volume 25, Issue 12, pp 2962–2970 | Cite as

Spray deposition of FeCrNiMn and high carbon steel coatings by thermite reaction

  • Gang Chen (陈刚)Email author
  • Shu-cheng Shen (沈书成)
  • Song Ni (倪頌)
  • Chen-shang Zhou (周承商)
Article
  • 4 Downloads

Abstract

A novel surface cladding technique was developed to prepare the FeCrNiMn alloy and high carbon steel cladding layers, and the microhardness, bonding strength, abrasion wear and corrosion resistance were investigated. The microstructures of the cladding layers were analyzed by using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectrometry (EDS). The results show that the bonding strength between the substrate and the two cladding layers were (432.6±21) and (438.3±12) MPa,respectively. Vickers hardness values of the two cladding layers were HV 418.5 and HV 329.6, respectively. The corrosion current densities of the two coatings were 2.926×10–6 and 6.858×10–6 A/cm2 after electrochemical corrosion test in 3.5% NaCl solution, and the wear rate were 1.78×10–7 and 1.46×10–6 mm3/mN after sliding wear test, respectively. This indicates that a well metallurgical bonding between the coating and the substrate was achieved, the abrasion wear and corrosion resistance of both coatings had been greatly improved compared with the substrate. The novel cladding technology is promising for preparing wear-and-corrosion resistant coatings.

Key words

spray deposition thermite reaction coating corrosion property wear property 

基于铝热反应的喷射熔覆FeCrMn 合金与高碳钢涂层微观组织与性能

摘要

本文提出了一种新颖的表面熔覆涂层技术, 并通过此技术制备了FeCrMn 合金与高碳钢涂层, 并对比研究了涂层的显微硬度、结合强度、耐磨损和耐腐蚀性能。采用X 射线衍射(XRD)、扫描电 子显微镜(SEM)和能谱(EDS)对涂层的微观组织、结构及元素分布进行了分析。两种涂层与基体 的结合强度分别达到了(432.6±21)和 (438.3±12) MPa,维氏硬度分别达到了HV 418.5 和HV 329.6,两 种涂层在3.5% NaCl 溶液中的电化学腐蚀电流密度分别为2.926×10-6 和6.858×10-6 A/cm2,磨损速率分 别为1.78×10–7 和1.46×10–6 mm3/mN。研究结果表明:本技术制备的涂层能够与基体达到良好的冶金 结合同时具有优异的耐腐蚀耐磨损性能,可望发展成为一种制备耐蚀耐磨涂层的新方法。

关键词

喷射沉积 铝热反应 涂层 腐蚀性能 磨损性能 

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Copyright information

© Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.College of Materials Science and EngineeringHunan UniversityChangshaChina
  2. 2.State Key Laboratory of Powder MetallurgyCentral South UniversityChangshaChina

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