Method for producing plug for piercing-rolling
US-2015184276-A1 · Jul 2, 2015 · US
Method for producing plug for piercing-rolling
US9914159B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9914159-B2 |
| Application number | US-201314396762-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 19, 2013 |
| Priority date | Apr 25, 2012 |
| Publication date | Mar 13, 2018 |
| Grant date | Mar 13, 2018 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
Provided is a method for producing a plug for use in a piercing-rolling mill for producing a seamless steel tube/pipe, and the method for producing the plug for piercing-rolling comprises shotblasting a surface of the plug, and arc-spraying a spray wire so as to form a film on a surface of a base metal of the plug that is shotblasted. In the arc-spraying step, the arc spraying is carried out by using, as the spray wire, a cored wire whose iron sheath tube is charged with at least iron oxide particles among iron particles and the iron oxide particles (one or more of FeO particles, Fe 3 O 4 particles, and Fe 2 O 3 particles), so as to form the film containing iron oxide and Fe. Accordingly, it is possible to enhance the production efficiency of the plug, and to produce the plug for piercing-rolling capable of securing the steady enhancement of the durability life of the plug during the piercing-rolling.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for producing a plug for use in a piercing-rolling mill for producing a seamless steel tube/pipe, the method comprising: shotblasting a surface of the plug; and arc-spraying a spray wire so as to form a film on a surface of a base metal of the plug that is shotblasted, wherein in the arc-spraying step, the arc-spraying is carried out by using, as the spray wire, a cored wire whose iron sheath tube is charged with at least iron oxide particles so as to form the film containing iron oxides and Fe, wherein the iron sheath charged with at least iron oxide particles results in a reduction in a time required to form the film having a predetermined oxide proportion on the surface of the base metal of the plug. 2. The method for producing a plug for piercing-rolling according to claim 1 , wherein the iron oxide particles comprise one or more of FeO particles, Fe 3 O 4 particles, and Fe 2 O 3 particles. 3. The method for producing a plug for piercing-rolling according to claim 1 , wherein the iron sheath tube is charged further with iron particles.
Assignees
Inventors
Classifications
Rolling basic material of solid, i.e. non-hollow, structure; Piercing {, e.g. rotary piercing mills} · CPC title
Pretreatment of the material to be coated, e.g. for coating on selected surface areas · CPC title
Wire arc spraying · CPC title
Subsequent to metal working · CPC title
Metallic material · CPC title
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- What does patent US9914159B2 cover?
- Provided is a method for producing a plug for use in a piercing-rolling mill for producing a seamless steel tube/pipe, and the method for producing the plug for piercing-rolling comprises shotblasting a surface of the plug, and arc-spraying a spray wire so as to form a film on a surface of a base metal of the plug that is shotblasted. In the arc-spraying step, the arc spraying is carried out by…
- 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 Tue Mar 13 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). 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).