Cavitation Erosion Resistance of Spray Welding Nickel - Based Coatings

J Chin Soc Corr Pro

2006, Vol. 26

Issue (4): 197-201 DOI:

Research Report

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Cavitation Erosion Resistance of Spray Welding Nickel - Based Coatings

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河海大学材料科学与工程系

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Abstract Ni-based alloy coatings were made by spray welding on surface of the mild steel(1Cr18Ni9Ti).The microstructure and performance of the coatings were investigated by optical microscope，X-ray diffraction，Vickers hardness，scanning electron microscope(SEM) and vibratory cavitation apparatus.The results show that the Ni60 coating has much higher hardness and finer structure than Ni25 coating and 1Cr18Ni9Ti.In addition,the vibratory cavitation result s show that the mass loss increases with increasing test time.These results indicate that the cavitation erosion resistance of Ni60 coating is much better than that of the Ni25 coating,due to higher hardness and finer structure.Furthermore,the cavitation erosion mechanisms were studied also in the end of this paper.The results showed that higher hardness and finer structure can increase the vibratory cavitation resistance of coatings.

Key words: cavitation erosion spray welding microstructure mechanism

Received: 10 June 2005

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;. Cavitation Erosion Resistance of Spray Welding Nickel - Based Coatings. J Chin Soc Corr Pro, 2006, 26(4): 197-201 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2006/V26/I4/197

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