Production and application of liquid-air quenchants

In place of sprayer cooling we propose quenching with a water-air mixture sprayed through a centrifugal sprayer. Use of water-air quenching excludes rejects due to cracking and sharply reduces the warping of flat parts.Sprayers should be placed above and below the piece. To obtain cooling at the same rate on the lateral surfaces the pressure of the mixture below the piece should be higher than above it. The following pressures were tested: 14.7·10⁴ Pa above and 19.6·10⁴ Pa below or 19.6·10⁴ and 34.3·10⁴ Pa, respectively.The synthetic quenchant Aquaplast can also be used with centrifugal sprayers.In quenching with a water-air mixture and aqueous solutions of Aquaplast it is possible to obtain different cooling rates by a combination of the pressure of the mixture and position of the sprayer. In place of sprayer cooling we propose quenching with a water-air mixture sprayed through a centrifugal sprayer. Use of water-air quenching excludes rejects due to cracking and sharply reduces the warping of flat parts. Sprayers should be placed above and below the piece. To obtain cooling at the same rate on the lateral surfaces the pressure of the mixture below the piece should be higher than above it. The following pressures were tested: 14.7·10⁴ Pa above and 19.6·10⁴ Pa below or 19.6·10⁴ and 34.3·10⁴ Pa, respectively. The synthetic quenchant Aquaplast can also be used with centrifugal sprayers. In quenching with a water-air mixture and aqueous solutions of Aquaplast it is possible to obtain different cooling rates by a combination of the pressure of the mixture and position of the sprayer.