Piercing mandrel having an improved service life for producing seamless tubes
US-2016346820-A1 · Dec 1, 2016 · US
Method of Manufacturing Piercer Plug
US2019151917A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2019151917-A1 |
| Application number | US-201716097331-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 10, 2017 |
| Priority date | Aug 8, 2016 |
| Publication date | May 23, 2019 |
| Grant date | — |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A piercer plug having good base-material deformation resistance is provided. A method of manufacturing a piercer plug ( 10 ) includes the steps of; preparing a plug body ( 1 ) including a tip portion ( 11 ) and a cylindrical portion ( 12 ) having a hole ( 121 ) usable to attach a bar and located rearward of the tip portion ( 11 ); forming a build-up layer ( 2 ) on the surface of the tip portion ( 11 ); and heating the plug body ( 1 ) such that the temperature of the tip portion ( 11 ) with the build-up layer ( 2 ) formed thereon is not lower than the austenite transformation temperature and the temperature of the cylindrical portion ( 12 ) is lower than the austenite transformation temperature.
First claim
Opening claim text (preview).
1 . A method of manufacturing a piercer plug comprising 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 a surface of the tip portion; and heating the plug body such that a temperature of the tip portion with the build-up layer formed thereon is not lower than an austenite transformation temperature and a temperature of the cylindrical portion is lower than the austenite transformation temperature. 2 . The method of manufacturing the piercer plug according to claim 1 , further comprising the step of forming a sprayed coating on a surface of the plug body with the build-up layer formed thereon before the step of heating. 3 . The method of manufacturing the piercer plug according to claim 1 , wherein the build-up layer is made of an Ni—W alloy. 4 . The method of manufacturing the piercer plug according to claim 2 , wherein the build-up layer is made of an Ni—W alloy.
Assignees
Inventors
Classifications
containing Mn · CPC title
with molybdenum or tungsten · CPC title
containing free particles of non-metal elements, e.g. carbon, silicon, boron, phosphorus or arsenic · 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 boron · CPC title
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- What does patent US2019151917A1 cover?
- A piercer plug having good base-material deformation resistance is provided. A method of manufacturing a piercer plug ( 10 ) includes the steps of; preparing a plug body ( 1 ) including a tip portion ( 11 ) and a cylindrical portion ( 12 ) having a hole ( 121 ) usable to attach a bar and located rearward of the tip portion ( 11 ); forming a build-up layer ( 2 ) on the surface of the tip portion…
- 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 May 23 2019 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).