Fine adjustment type pipeline external aligning device leading screw

The utility model relates to a leading screw of a fine-tuning type pipeline external aligning device for the pipeline welding group in a pipeline construction operation, which relates to the technical field of a pipeline system. The leading screw is characterized in that the leading screw (1) is pro...

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Bibliographische Detailangaben
Hauptverfasser:	ZHANG CHUNHE, ZHANG FUQIANG, YAN ZUGANG, FAN JIMEI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING 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 CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING 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 MACHINE TOOLS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS SOLDERING OR UNSOLDERING SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	The utility model relates to a leading screw of a fine-tuning type pipeline external aligning device for the pipeline welding group in a pipeline construction operation, which relates to the technical field of a pipeline system. The leading screw is characterized in that the leading screw (1) is processed through adopting steel which is tempered by the heat hardening and the high tempering compound heat treatment and coating a nitriding wear-resistant layer (4) whose thickness is a 0.05-0.6mm on the surface of the leading screw (1). A movable protective cap (3) is added on the ball-type end of the leading screw (1) and is matched with the ball-type end in a sliding mode. The leading screw has good comprehensive mechanical properties of a high intensity and a higher plasticity and tenacity, the surface of the leading screw is provided with the nitriding layer which has good intensity, good abradability and good corrosion resistance performance, which can effectively prevent the corrosion of water, steam and al