MEDICAL GUIDE WIRE AND METHOD FOR MANUFACTURING THE SAME

• Main Author: KATO TOMIHISA
• Format: Patent
• Language: English
• Published: 20.10.2011
• Subjects: ALLOYS; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; HUMAN NECESSITIES; HYGIENE; MACHINE TOOLS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; MEDICAL OR VETERINARY SCIENCE; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; PUNCHING METAL; SOLDERING OR UNSOLDERING; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WELDING; WORKING BY LASER BEAM; WORKING OR PROCESSING OF METAL WIRE

PROBLEM TO BE SOLVED: To provide a joining method, or a technical issue, for improving mechanical strength without lowering characteristics of mechanical strength due to thermal effect on the core wire, when using a stainless steel wire for a core wire and joining a coil spring body with the core wire.SOLUTION: The characteristics of mechanical strength are improved by performing wire drawing of high deformation with a total reduction of area of 90-97.6% using austenitic stainless steel wire acquired by solution heat treatment, for the core wire, and when joining the core wire with the coil spring body, joining them by using eutectic alloy with the melting temperature of 180-495°C as a joining member.