The paper presents the basic principle and application of High Velocity Arc Spraying technique. Through adopting convergent-divergent nozzle, air circulation cooling and computer aided design technique, particle velocity was enhanced, which surpasses velocity of sound, and atomization effect was improved, so HVAS fabricated high quality coating. Experiment results show that HVAS has high particle velocity, high atomization effect, high bond strength and low porosity. Average velocity of atomized Aluminum particle is 373m/s. Bond strength, porosity and average particle size of 3Cr13 coating are 60MPa, 0.9% and 4.32 m respectively. For high coating quality, HVAS is widely used in maintenance, corrosion resistance and surface strengthening.

atomization, bond strength, coating quality, computer aided design, corrosion resistance, high velocity arc spray coatings, particle velocity, porosity, surface strengthening
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Copyright © 2001 ASM International. All rights reserved.
2001
ASM International
Topics
Thermal spray coatings Atomization Computer-aided design Bonding strength Porosity
Issue Section:
Equipment and Systems