Gas case hardening pipes for conveying abrasive materials - uses two centering pipes to feed gas and has ring induction heater and spray on trolley

The appts resembles a lathe, where two centering pipes are used to feed gas through the bore of the pipe/being case hardened. Each pipe is mounted on a block driven axially w.r.t. one pipe by a work cylinder, to clamp the pipe between the centres; and each block has a drive unit which rotates the ce...

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Bibliographische Detailangaben
1. Verfasser:	S. A. SVETLOV, V. S. MOKIN, M. S. SHNEIDERMAN, M. G. SELNITSYN, V. A. LUPIN, T. I. PENYASKIN, G. P. STEPANOV, I. Y. REGER ET N. I. TIMKIN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	The appts resembles a lathe, where two centering pipes are used to feed gas through the bore of the pipe/being case hardened. Each pipe is mounted on a block driven axially w.r.t. one pipe by a work cylinder, to clamp the pipe between the centres; and each block has a drive unit which rotates the centres and therefore the pipe. A trolley is driven in a direction parallel with the axis of the pipe, and is fitted with a ring induction, heater and a ring spray for coolant used to quench the pipe. The centering pipe used as the gas inlet pref contains an internal jacket through which cooling water flows to keep the gas cool before it enters the pipe; and the trolley pref. carries rollers it enters to support the pipe, esp while the latter is hot. Automatic case hardening of long pipes which are supported during the process so they do not kink or bend. L'invention concerne les constructions mécaniques. L'installation faisant l'objet de l'invention est caractérisée notamment en ce qu'elle comporte au moins un actionneur 9 pour la rotation du produit à traiter 4 conjointement avec le dispositif 3 pour l'admission du gaz de cémentation dans l'enceinte du produit à traiter et avec le dispositif 5 pour l'évacuation dudit gaz de ladite enceinte, et un raccord rotatif ou collecteur 15 mis en communication avec la conduite à gaz du dispositif 3 d'admission du gaz de cémentation dans l'enceinte du produit à traiter. L'invention peut être utilisée notamment pour le durcissement de la surface intérieure des tubes utilisés pour le transport de matériaux abrasifs, par exemple de pulpes, ou pour le transport pneumatique de matériaux pulvérulents.