SU863669A1 - Bath for isothermal tempering of metallic parts - Google Patents

Description

The invention relates to the construction of equipment used in the isothermal hardening of steel parts. A known quenching bath containing a crucible and heaters 1 j. The closest to the technical nature of the invention is a bath for isothermal quenching of metal products, mainly in molten salts, containing a crucible carcass, a device for cooling the melt, heaters 2. However, the operation of an isothermal bath of this design leads to difficulties in removing an outdated heating element melt solidification. The purpose of the invention is to improve its operation. This goal is achieved by the fact that the bath containing the frame, the crucible is a device for cooling the melt, the heaters are provided with hermetically sealed in the walls of the crucible tubes in which the heaters are located. In FIG. 1 shows a bath for isothermal tempering and, a general view of FIG. 2 shows section A-A in FIG. one; in fig. 3 - node I - in FIG. 2. The bath consists of the frame 1 and the crucible 2. The space between the walls of the frame for heat insulation is filled with glass wool 3. The crucible is sealed, for example welded, stainless steel tubes 4, through which straight tubular electric heaters 5 pass, electrically insulated from the body with fluoroplastic sleeves & The current-carrying parts of the tubular heating elements are closed with a lid 7. A descaler 8 is provided for collecting the scale. Water is introduced into the reactor by means of a water-cooling chamber 9. Mixing the melt is produced by air that is supplied through a tube (not shown). The use of the invention makes it possible to quickly and easily replace tubular heating elements, even if the melt in the crucible of an isothermal bath is in a hardened state, leads to the replacement of the shell of stainless steel heating elements with a cheaper low carbon carbon formula of the bath for isotherms, the hardening of metal parts mainly in melts salts, containing skeleton, crucible, device for cooling melt, heaters, making it possible, in order to improve operating conditions, to sleep wife tightly fastened in the walls of the crucible tubes in Coto (fttsjx located heaters.

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Sources of information taken into account in the examination

1. USSR author's certificate No. 120 “46, cl. C 21 D 1/20, 1958.

2. Kaufman V.G., et al. Electric furnaces with liquid heat carriers. M., Energie, 1973, p. 28-32.

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Claims (1)

Claim A bath for isothermal hardening of metal parts is predominantly in salt melts, containing a frame, a crucible, a device for cooling the melt, heaters, which, in order to improve operating conditions, is equipped with tubes in which the heaters are sealed in the walls of the crucible .