Method for improving performance of large-caliber thick-wall pipe obtained by casting and extrusion compound forming

The invention relates to a method for improving performance of a large-caliber thick-wall pipe obtained by casting and extrusion compound forming, and belongs to the technical field of methods for improving the performance of the large-caliber thick-wall pipe. Through the adoption of the method disc...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	LI YONGTANG, HUI TIANJING, JIA LU, LEI BUFANG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL CHEMISTRY GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS PUNCHING METAL TRANSPORTING
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