Plug for rolling of seamless steel pipe, method for manufacturing the same and method for manufacturing seamless steel pipe using the same
US-2015217349-A1 · Aug 6, 2015 · US
Piercer Plug and Method of Manufacturing the Same
US2018354008A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018354008-A1 |
| Application number | US-201615762821-A |
| Country | US |
| Kind code | A1 |
| Filing date | Aug 12, 2016 |
| Priority date | Sep 25, 2015 |
| Publication date | Dec 13, 2018 |
| Grant date | — |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A piercer plug with increased life and a method of manufacturing it are provided. The piercer plug 1 includes a tip portion 2 and a trunk portion 3 made of the same material as the tip portion 2 and continuous to the tip portion 2. The trunk portion 3 includes a cylindrical portion 5 having a hole used for attaching a bar. The tip portion 2 is harder than the cylindrical portion 5.
First claim
Opening claim text (preview).
1 . A piercer plug comprising: a tip portion; and a trunk portion made of the same material as the tip portion and continuous to the tip portion, wherein the trunk portion includes a cylindrical portion having a hole used for attaching a bar, and the tip portion is harder than the cylindrical portion. 2 . The piercer plug according to claim 1 , further comprising: a coating formed on a surface of the piercer plug. 3 . A method of manufacturing a piercer plug, the method comprising: preparing a piercer plug including a tip portion and a trunk portion made of the same material as the tip portion and continuous to the tip portion; and heating the piercer plug such that a temperature of the tip portion is not lower than an austenite transformation temperature and a temperature of a cylindrical portion included in the trunk portion and having a hole used for attaching a bar is lower than the austenite transformation temperature. 4 . The method of manufacturing a piercer plug according to claim 3 , further comprising: forming a coating on a surface of the piercer plug before the heating.
Assignees
Inventors
Classifications
with copper · CPC title
- B21B25/00Primary
Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor {; Construction of, or alloys for, mandrels or plugs} · CPC title
with molybdenum or tungsten · CPC title
- C21D6/004Primary
containing Cr and Ni · CPC title
Ferrous alloys, e.g. steel alloys (cast-iron alloys C22C37/00) · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US2018354008A1 cover?
- A piercer plug with increased life and a method of manufacturing it are provided. The piercer plug 1 includes a tip portion 2 and a trunk portion 3 made of the same material as the tip portion 2 and continuous to the tip portion 2. The trunk portion 3 includes a cylindrical portion 5 having a hole used for attaching a bar. The tip portion 2 is harder than the cylindrical portion 5.
- Who is the assignee on this patent?
- Nippon Steel & Sumitomo Metal Corp
- What technology area does this patent fall under?
- Primary CPC classification B21B25/00. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Dec 13 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).