发明名称 |
TORSIONAL SEVERE PLASTIC DEFORMATION METHOD FOR CONICAL TUBE METALS |
摘要 |
PURPOSE: A torsion severe plastic deformation method of conical metal tube is provided to make a micro-structure to microcrystalline or nano-crystalline, thereby improving the mechanical property of conical metal tube. CONSTITUTION: A torsion severe plastic deformation method of conical metal tube performs the following steps. A punch suitable for the inner shape of the conical metal pipe is mounted in the inside of conical metal pipe. A mold suitable for the outer shape of the conical metal pipe is mounted in the outside of conical metal pipe. A micro-structure of conical metal pipe is formed into microcrystalline or nano-crystalline through the shear deformation obtained by applying the compression and torsion to the conical metal pipe by means of the punch and the mold. The shear deformation is obtained by rotating the punch after the punch is pressured by the mold. [Reference numerals] (AA) Initial piece shape; (BB) After process piece shape; (CC) Piece input step; (DD) Mold insertion step; (EE) Twisting; (FF) Compression and twisting step; (GG) Compression strength |
申请公布号 |
KR20130068827(A) |
申请公布日期 |
2013.06.26 |
申请号 |
KR20110136224 |
申请日期 |
2011.12.16 |
申请人 |
POSTECH ACADEMY-INDUSTRY FOUNDATION |
发明人 |
KIM, HYOUNG SEOP;UM, HO YONG;YOON, EUN YOO;LEE, DONG JUN;LEE, SEONG |
分类号 |
B21D11/02;B21D7/00;B21D11/14;C21D7/02 |
主分类号 |
B21D11/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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