Piercing mandrel having an improved service life for producing seamless tubes
US-2016346820-A1 · Dec 1, 2016 · US
Piercing plug
US2015321233A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2015321233-A1 |
| Application number | US-201314409150-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jul 16, 2013 |
| Priority date | Jul 20, 2012 |
| Publication date | Nov 12, 2015 |
| Grant date | — |
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- Title
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Abstract
Official abstract text for this publication.
A piercing plug of the present invention includes: a plug body; a Ni—Cr layer formed on a surface of the plug body; and a sprayed coating formed on a surface of the Ni—Cr layer. The plug body contains, by mass %, 20 to 30% of Cr, 30 to 55% of Ni, 0.005 to 0.5% of C, 0.1 to 1.0% of Si, 0.2 to 1.5% of Mn, and at least one of Mo and W which satisfy a following conditional expression (A), and remainder including Fe and impurities. 1.5%≦Mo+0.5 W≦8.5% (A)
First claim
Opening claim text (preview).
1 . A piercing plug comprising: a plug body; a Ni—Cr layer formed on a surface of the plug body; and a sprayed coating formed on a surface of the Ni—Cr layer, wherein the plug body contains, by mass %, 20 to 30% of Cr, 30 to 55% of Ni, 0.005 to 0.5% of C, 0.1 to 1.0% of Si, 0.2 to 1.5% of Mn, and at least one of Mo and W which satisfy a following conditional expression (A), and remainder including Fe and impurities. 1.5%≦Mo+0.5 W≦8.5% (A) 2 . The piercing plug according to claim 1 , wherein a heat treatment is performed at 850 to 1150° C. after the Ni—Cr layer and the sprayed coating are formed on the plug body. 3 . The piercing plug according to claim 1 or 2 , wherein the sprayed coating contains iron and iron oxide. 4 . The piercing plug according to any one of claims 1 to 3 , wherein the sprayed coating is formed by arc-spraying a steel wire rod. 5 . The piercing plug according to any one of claims 1 to 4 , wherein a thickness of the Ni—Cr layer is 50 to 100 μm.
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Classifications
with at least one metal matrix material layer comprising a mixture of at least two metals or metal phases or a metal-matrix material with hard embedded particles, e.g. WC-Me · CPC title
with at least one metal alloy layer · CPC title
After-treatment · CPC title
Wire arc spraying · CPC title
containing free particles of non-metal elements, e.g. carbon, silicon, boron, phosphorus or arsenic · CPC title
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- What does patent US2015321233A1 cover?
- A piercing plug of the present invention includes: a plug body; a Ni—Cr layer formed on a surface of the plug body; and a sprayed coating formed on a surface of the Ni—Cr layer. The plug body contains, by mass %, 20 to 30% of Cr, 30 to 55% of Ni, 0.005 to 0.5% of C, 0.1 to 1.0% of Si, 0.2 to 1.5% of Mn, and at least one of Mo and W which satisfy a following conditional expression (A), and remai…
- 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 Nov 12 2015 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).