基本信息:
- 专利标题： STEEL PIPE QUENCHING METHOD AND STEEL PIPE MANUFACTURING METHOD USING SAME
- 专利标题（中）：钢管淬火方法和使用该方法的钢管制造方法
- 申请号：EP11821291.9 申请日：2011-08-26
- 公开(公告)号：EP2612932B1 公开(公告)日：2018-01-03
- 发明人： SEO, Masanao
- 申请人： Nippon Steel & Sumitomo Metal Corporation
- 申请人地址： 6-1, Marunouchi 2-chome Chiyoda-ku Tokyo 100-8071 JP
- 专利权人： Nippon Steel & Sumitomo Metal Corporation
- 当前专利权人： NIPPON STEEL CORPORATION, JP
- 当前专利权人地址： NIPPON STEEL CORPORATION, JP
- 代理机构： Zimmermann & Partner Patentanwälte mbB
- 优先权： JP2010196549 20100902
- 国际公布： WO2012029268 20120308
- 主分类号： C21D9/08
- IPC分类号： C21D9/08 ; C21D1/63 ; C21D1/64 ; C21D9/00
摘要：
In quenching , where a heated steel pipe (2) is immersed in a water bath (3) in parallel with water surface for cooling a pipe outer surface, and cooling water is injected from an axial center nozzle (8) into one end of pipe for cooling a pipe inner surface, thereby rapidly cooling the entire pipe surface,, reduction of strength difference along a length of the quenched pipe becomes possible by moving the nozzle (8) following the motion of the pipe axis (2), and starting injecting the water from the nozzle (8) so as for the water to reach the other pipe end at the time of the immersion of the entire circumference of the pipe outer surface. An opening (3a) preferably faces the nozzle (8) to remove the water, and the flow velocity is preferably set to 23 m/sec or more for better water flow inside the pipe (2).
公开/授权文献:
IPC结构图谱:
| C | 化学；冶金 |
| --C21 | 铁的冶金 |
| ----C21D | 改变黑色金属的物理结构；黑色或有色金属或合金热处理用的一般设备；通过脱碳、回火或其他处理使金属具有韧性 |
| ------C21D9/00 | 热处理，例如适合于特殊产品的退火、硬化、淬火、回火；所用的炉子 |
| --------C21D9/08 | .用于管状体或管子 |