Assessment of internal defects of hardfacing coatings in regeneration of machine parts
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This paper presents the use of computed tomography for the evaluation of hardfacing. The method used in this research is hardfacing by tungsten inert gas using alloy wires of wear resistant layers. This paper discusses the latest materials used for hardfacing and their application. It characterizes the defects of obtained hardfacing and impact of the type of wire on the concentration of defects. It further, the basic mechanical properties of coatings were determined. The results are subjected to qualitative and quantitative analysis. The smallest average percentage of defects in relation to the overall surface is observed for the hardfacing EL-600 HB, which amounts to 1.5%. The highest average percentage of defects in relation to the overall surface is observed for the hardfacing EL-500 HB, which amounts to 7.2%. The chemical composition of hardfacing has been presented.
Key wordshardfacing coating tomography welding defects
本文采用计算机断层扫描技术对堆焊效果进行评估。采用钨极惰性气体保护进行堆焊,焊料为 耐磨涂层的合金线。讨论了最新的堆焊材料及其应用。对堆焊涂层的缺陷进行表征,并研究焊料线材 对缺陷浓度的影响。此外,测试了涂层的基本力学性能,对测试结果进行定性和定量分析。结果表明, EL-600 HB 堆焊涂层总表面的平均缺陷百分数最小,为1.5%。EL-600 HB 堆焊涂层总表面的平均缺陷 百分数最大,为7.2%。获得了堆焊涂层的化学成分。
关键词堆焊 涂层 断层扫描术 焊接 缺陷
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- CHAKRABORTY G, DAS C R, ALBERT S K, BHADURI A K, MURUGESAN S, DASGUPTA A. Effect of alloy 625 buffer layer on Hardfacing of modified 9Cr-1Mo steel using nickel base Hardfacing alloy [J]. Journal of Materials Engineering and Performance, 2016, 25(4): 1663–1672. DOI: 10.1007/s11665-016-1965-z.CrossRefGoogle Scholar
- CORREA E O, ALCANTARA N G, VALERIANO L C, BARBEDO N D, CHAVES R R. The effect of microstructure on abrasive wear of a Fe–Cr–C–Nb hardfacing alloy deposited by the open arc welding process [J]. Surface & Coatings Technology, 2015, 276: 479–484. DOI: 10.1016/j.surf coat.2015. 06.026.CrossRefGoogle Scholar
- KROLCZYK J B, GAPINSKI B, KROLCZYK G M, SAMARDZIC I, MARUDA R W, SOUCEK K, JAVADI Y, LEGUTKO S, NIESLONY P, STAS L. Topographic inspection as a method of weld joint diagnostic [J]. Tehnicki Vjesnik–Technical Gazette, 2016, 23(1): 301–306. DOI: 10.17559/TV-20141230182054.Google Scholar