Torsional extreme-plastic processing method of conic metal pipe
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United States of America Patent
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Sep 20, 2016
Grant Date -
Nov 13, 2014
app pub date -
Nov 30, 2012
filing date -
Dec 16, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to a torsional extreme-plastic processing method. In other words, a processing method in which severe plastic deformation based on torsion and compressive force is applied to a material by using a mold to produce miniaturize and nano-size crystal particles in a conic pipe. According to the severe plastic deformation method of the present invention, a punch that matches an inner shape of the conic metal pipe is mounted inside the conic metal pipe, and then a mold that matches an outer shape of the conic metal pipe is mounted outside the conic metal pipe. Thus, microstructures of the conic metal pipe may be ultra-finely crystallized or nano-crystallized through shearing by applying compression and torsion to the conic metal pipe.
First Claim
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International Classification(s)
- B21K:MAKING FORGED OR PRESSED PRODUCTS, e.g. HORSE-SHOE....
- B21J:FORGING; HAMMERING; PRESSING; RIVETING; FORGE FURN....
- C22F:CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS MET....
- B21C:MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PR....
- B21D:WORKING OR PROCESSING OF SHEET METAL OR METAL TUBE....
- C21D:MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS....
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