US2015125630A1PendingUtilityA1

Method for producing a plug for hot tube-making

Assignee: NIPPON STEEL & SUMITOMO METAL CORPPriority: Apr 19, 2012Filed: Mar 6, 2013Published: May 7, 2015

Est. expiryApr 19, 2032(~5.8 yrs left)· nominal 20-yr term from priority

Inventors:Yasuyoshi Hidaka Yasuto Higashida Kazuhiro Shimoda

C23C 4/18C23C 4/065B21B 25/00C23C 4/125C23C 4/131B21B 19/04B21B 25/04C23C 4/06

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References

Claims

Abstract

A plug for hot tube-making having a sprayed coating resistant to peeling is provided. A method for producing a plug for hot tube-making according to the present embodiment includes a step of preparing a plug whose surface includes a sprayed coating formed thereon, the sprayed coating containing iron and an iron oxide; and a heat treatment step during which the plug is kept at 400° C. to 550° C. for 5 to 60 minutes.

Claims

exact text as granted — not AI-modified

1 . A method for producing a plug for hot tube-making, comprising
 a step of preparing a plug whose surface includes a sprayed coating formed thereon, the sprayed coating containing iron and an iron oxide; and   a heat treatment step during which the plug is kept at 400° C. to 550° C. for 5 to 60 minutes.   
     
     
         2 . The method for producing a plug according to  claim 1 , wherein
 the step of preparing the plug further comprises:   a step of preparing a plug body; and   a step of forming the sprayed coating by performing arc spraying with an iron wire rod onto a surface of the plug body.

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