Production method of B7 heat transfer copper alloy seamless pipe

• Main Author: YILONG PU
• Format: Patent
• Language: English
• Published: 14.06.2006
• Subjects: AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHEMISTRY; COMBINED OPERATIONS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MACHINE TOOLS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING; MEASURING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; OTHER WORKING OF METAL; PERFORMING OPERATIONS; PHYSICS; POWDER METALLURGY; PUNCHING METAL; TESTING; TRANSPORTING; UNIVERSAL MACHINE TOOLS; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL

A technology for manufacturing the heat-conducting seamless pipe made of B7 Cu-alloy includes such steps as smelting B7 Cu-alloy in electric furnace, casting, hydraulic pressing to become slender tubular blank, cold rolling, annealing in controllable protective gas, cold drawing until its wall thickness is 0.5-1.2 mm, and removing surficial layer by cold drawing. Its advantage is no need of acid washing.