In this paper, Arc sprayed mold-making technology process were described systematically, and some technique difficult points of this project have been solved. ? 2mm wire Arc spraying system is first applied in mold-making technology in China. A water solution release agent has been chosen to meet the requires of practical mold-making technology . A proper formula of backup materials is chosen by testing compression strength of different formulas. This backup material has high ultimate strength of compression and thermal conductivity and can be applied in practical mold making technology process.

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