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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10888906 B1

PDFFull Text
Date of Patent:
Jan. 12, 2021

Filed:

May. 10, 2017

Method of manufacturing piercer plug

Applicant:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Inventors:

Yasuyoshi Hidaka, Tokyo, JP;

Yasuto Higashida, Tokyo, JP;

Naoya Shirasawa, Tokyo, JP;

Yuichi Yamanari, Tokyo, JP;

Assignee:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Attorney:

Banner & Witcoff, Ltd.

Primary Examiner:

Stefanie J Cohen

Assistant Examiner:

Danielle M Carda

Int. Cl.
CPC ...
B21B 25/00 (2006.01); C22C 38/04 (2006.01); B21B 19/04 (2006.01); C21D 9/00 (2006.01); C22C 38/02 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C23C 4/18 (2006.01); C21D 1/18 (2006.01); C21D 1/42 (2006.01); C23C 4/06 (2016.01); C23C 4/134 (2016.01); C23C 4/067 (2016.01); B23K 35/30 (2006.01); C22C 19/05 (2006.01); C23C 4/129 (2016.01); C23C 4/02 (2006.01); C23C 4/131 (2016.01); C23C 4/08 (2016.01); C21D 6/00 (2006.01); C22C 27/04 (2006.01); C22C 38/00 (2006.01); C22C 38/52 (2006.01); C22C 38/54 (2006.01);
U.S. Cl.
CPC ...
B21B 25/00 (2013.01); B21B 19/04 (2013.01); B23K 35/3033 (2013.01); C21D 1/18 (2013.01); C21D 1/42 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/007 (2013.01); C21D 6/008 (2013.01); C21D 9/0068 (2013.01); C22C 19/057 (2013.01); C22C 27/04 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/52 (2013.01); C22C 38/54 (2013.01); C23C 4/02 (2013.01); C23C 4/06 (2013.01); C23C 4/067 (2016.01); C23C 4/08 (2013.01); C23C 4/129 (2016.01); C23C 4/131 (2016.01); C23C 4/134 (2016.01); C23C 4/18 (2013.01); Y02P 10/25 (2015.11);
Abstract

A piercer plug having good base-material deformation resistance is provided. A method of manufacturing a piercer plug () includes the steps of; preparing a plug body () including a tip portion () and a cylindrical portion () having a hole () usable to attach a bar and located rearward of the tip portion (); forming a build-up layer () on the surface of the tip portion (); and heating the plug body () such that the temperature of the tip portion () with the build-up layer () formed thereon is not lower than the austenite transformation temperature and the temperature of the cylindrical portion () is lower than the austenite transformation temperature.

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