Microstructure and Properties Research of RE-containing FeMnCrNiAlBSi-Cr3C2 CoatingsReport as inadecuate




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RE-containing FeMnCrNiAlBSi-Cr3C2 coatings were prepared on 20 steel substrate by high velocity arc spraying. Microstructure and properties of the coatings were studied by means of optical microscope, microhardness tester, scanning electron microscope and energy dispersion spectrum. The results show that FeMnCrNiAlBSi-Cr3C2 coatings characteristically consisted of successive layers contained solid solution phases, oxide phases and few pores. Compared with the coating which doesn’t contain RE, RE-containing FeMnCrNiAlBSi-Cr3C2 coating has the higher bond strength, cohesive strength, microhardness and high-temperature oxidation resistance. Both the two coatings have relatively excellent thermal shock resistance.

KEYWORDS

high velocity arc spraying; RE-containing FeMnCrNiAlBSi-Cr3C2 coating; high-temperature oxidation resistance; thermal shock resistance

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Author: Jin-peng Sang, Yong-jun Chao, Chu Yuan, Shao-guang Liu, Ji-peng Yao, Lai-ma Luo, Yu-song Xu, Jian Li

Source: http://www.scirp.org/



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