| 发明名称 |
SCREW OR TAPPING SCREW |
| 摘要 |
PROBLEM TO BE SOLVED: To provide a tapping screw, in addition, a general screw of high strength and high surface hardness while the surface hardness is balanced with the internal hardness. SOLUTION: A screw or a tapping screw is formed of superfine structure steel consisting of ferrite particles of average grain size of≤3μm, and has a nitride layer on a surface portion. COPYRIGHT: (C)2004,JPO
|
| 申请公布号 |
JP2004137560(A) |
申请公布日期 |
2004.05.13 |
| 申请号 |
JP20020303657 |
申请日期 |
2002.10.17 |
| 申请人 |
NATIONAL INSTITUTE FOR MATERIALS SCIENCE |
发明人 |
TORITSUKA SHIRO;NAGAI HISASHI;KOMATSU TAKASHI;MIYASHITA NAOHISA;TAKAGI FUMITO;MATSUZAWA MASAAKI;MIYASAKA YOSHIMASA;HATANO YOSHIKI;FUJIMORI CHIAKI;KOSAKA MASAYOSHI;UEMATSU MASAAKI;HAMA HAJIME |
| 分类号 |
F16B25/00;C21D1/06;C21D9/00;C22C38/00;C22C38/02;C22C38/04;C22C38/06;C22C38/58;C23C8/26;C23C8/32;F16B33/06;(IPC1-7):C21D9/00 |
主分类号 |
F16B25/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
