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Microstructure and corrosion resistance of high-chromium iron-base coating by plasma cladding 被引量:1
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作者 王立梅 《China Welding》 EI CAS 2011年第4期62-65,共4页
A new type of high-chromium iron-base coating was fabricated on substrate of hardened and tempered grade C steel by plasma cladding with Fe-Cr-C alloy powders. The coating has fine microstructure and is metallurgicall... A new type of high-chromium iron-base coating was fabricated on substrate of hardened and tempered grade C steel by plasma cladding with Fe-Cr-C alloy powders. The coating has fine microstructure and is metallurgically bonded to the grade C steel substrate. The corrosion resistance of the coating in solutions of 0. 5 mol/L H2SO4 , 3.5 % NaCl and seawater was evaluated utilizing the electrochemical polarization corrosion-test method. Because of the inherent excellent corrosion- resisting properties of the constituting phase and the fine microstucture, the plasma clad coating exhibits excellent corrosion resistance in the water solutions of 0. 5 mol/L H2S04, 3.5% NaCl and seawater. 展开更多
关键词 plasma clad high-chromium iron-base coating MICROSTRUCTURE corrosion resistance
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In situ synthesis of Fe-based alloy clad coatings containing TiB_2–TiN –(h-BN) 被引量:1
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作者 Shao-qun Jiang Gang Wang +3 位作者 Qing-wen Ren Chuan-duo Yang Ze-hua Wang and Ze-hua Zhou 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2015年第6期613-619,共7页
Fe-based alloy coatings containing TiB2–TiN –(h-BN) were synthesized in situ on Q235 steel substrates by a plasma cladding process using the powders of Fe901 alloy, Ti, and h-BN as raw materials. The effects of Ti... Fe-based alloy coatings containing TiB2–TiN –(h-BN) were synthesized in situ on Q235 steel substrates by a plasma cladding process using the powders of Fe901 alloy, Ti, and h-BN as raw materials. The effects of Ti/h-BN mass ratio on interfacial bonds between the coating and substrate along with the microstructures and microhardnesses of the coatings were investigated. The results show that the Ti/h-BN mass ratio is a vital factor in the formation of the coatings. Free h-BN can be introduced into the coatings by adding an excess amount of h-BN into the precursor. Decreases in the Ti/h-BN mass ratio improve the microstructural uniformity and compactness and enhance the interfacial bonds of the coatings. At a Ti/h-BN mass ratio of 10/20, the coating is free of cracks and micropores, and mainly consists of Fe-Cr, Fe3B, TiB2, TiN, Ti2N, TiB, FeN, FeB, Fe2B, and h-BN phases. Its average microhardness in the zone between 0.1–2.8 mm from the coating surface is about Hv0.2 551.5. 展开更多
关键词 iron-based materials coatings plasma cladding in situ synthesis microhardness
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Fabrication of Fe–TiC–Al_2O_3 composites on the surface of steel using a TiO_2–Al–C–Fe combustion reaction induced by gas tungsten arc cladding
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作者 Mahmood Sharifitabar Jalil Vahdati Khaki Mohsen Haddad Sabzevar 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2016年第2期193-204,共12页
The aim of the present study was to fabricate Fe-TiC-Al2O3 composites on the surface of medium carbon steel.For this purpose,TiO2-3C and 3TiO2-4Al-3C-xFe(0 ≤ x ≤ 4.6 by mole) mixtures were pre-placed on the surfac... The aim of the present study was to fabricate Fe-TiC-Al2O3 composites on the surface of medium carbon steel.For this purpose,TiO2-3C and 3TiO2-4Al-3C-xFe(0 ≤ x ≤ 4.6 by mole) mixtures were pre-placed on the surface of a medium carbon steel plate.The mixtures and substrate were then melted using a gas tungsten arc cladding process.The results show that the martensite forms in the layer produced by the TiO2-3C mixture.However,ferrite-Fe3C-TiC phases are the main phases in the microstructure of the clad layer produced by the 3TiO2-4Al-3C mixture.The addition of Fe to the TiO2-4Al-3C reactants with the content from 0 to 20wt%increases the volume fraction of particles,and a composite containing approximately 9vol%TiC and A12O3 particles forms.This composite substantially improves the substrate hardness.The mechanism by which Fe particles enhance the TiC + A12O3 volume fraction in the composite is determined. 展开更多
关键词 composite coatings iron-based materials combustion cladding microstructure microhardness
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