Title:
ピアサープラグ及びその製造方法
Document Type and Number:
Japanese Patent JP6860083
Kind Code:
B2
Abstract:
A piercer plug with increased recyclability is provided. A piercer plug (1) has a chemical composition of, in mass %: 0.15 to 0.30 % C; 0.4 to 1.2 % Si; 0.2 to 1.5 % Mn; 0.1 to 2.0 % Ni; 0 to 4.0 % Mo and 0 to 4.0 % W, where the total content of Mo and W is 1.0 to 6.0 %; higher than 1.0 % and not higher than 4.0 % Cr; 0 to 0.2 % B; 0 to 1.0 % Nb; 0 to 1.0 % V; 0 to 1.0 % Ti; and balance Fe and impurities, the plug including a tip portion (2) and a trunk portion (3) made of the same material as the tip portion (2) and contiguous to the tip portion (2). The trunk portion (3) includes a cylindrical portion (5) having a hole used to mount a bar. The tip portion (2) is harder than the cylindrical portion (5).
Inventors:
Yasuyoshi Hidaka
Naoya Shirasawa
Tatsuya Miyai
Naoya Shirasawa
Tatsuya Miyai
Application Number:
JP2019549868A
Publication Date:
April 14, 2021
Filing Date:
August 09, 2018
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C22C38/00; B21B25/00; C21D9/00; C22C38/54
Domestic Patent References:
| JP11179407A | ||||
| JP9195002A | ||||
| JP10137818A | ||||
| JP10291008A | ||||
| JP62244505A | ||||
| JP2005336567A | ||||
| JP8309108A | ||||
| JP2012172344A |
Foreign References:
| WO2017051632A1 | ||||
| WO2014013963A1 | ||||
| WO2004101837A1 | ||||
| WO2014050975A1 |
Attorney, Agent or Firm:
Hidetoshi Ueba
Satoshi Komiyama
Satoshi Komiyama