Piercing plug and manufacturing method of piercing plug
AssigneeNippon Steel & Sumitomo Metal Corporation
InventorsYosuke Tatebayashi, Yasuyoshi Hidaka, Yasuto Higashida, Kouji Nakaike, Takateru Inage
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Abstract
A piercing plug includes a plug main body, and a sprayed coating which is formed on a surface of the plug main body and includes iron and iron oxide. A chemical composition of the sprayed coating includes, in addition to the iron and the iron oxide, by mass %, C: 0.015% to 0.6%, Si: 0.05% to 0.5%, Mn: 0.1% to 1.0%, and Cu: 0 to 0.3%.
Claims5
A piercing plug comprising:
- a plug main body which is tapered off toward a tip;
- and
- a sprayed coating which is formed on a surface of the plug main body, the sprayed coating consisting of the following chemical composition:
- by mass %,
- C:
- 0.015% to 0.6%,
- Si:
- 0.05% to 0.5%,
- Mn:
- 0.1% to 1.0%, and
- Cu:
- 0 to 0.3%.
- and a balance composed of iron, iron oxide, and impurities, at least one impurity selected from the group consisting of P, S, or O.
A manufacturing method of a piercing plug including a plug main body which is tapered off toward a tip, and a sprayed coating which is formed on a surface of the plug main body, the manufacturing method comprising:
- a process of forming the sprayed coating on the surface of the plug main body by arc-spraying a steel wire rod on the surface of the plug main body,
- wherein a chemical composition of the steel wire rod includes, by mass %,
- C:
- 0.06% to 1.1%,
- Si:
- 0.4% to 1.3%,
- Mn:
- 0.2% to 2.0%,
- Cu:
- 0 to 0.5%, and
- Fe.
Dependencies are inferred from the claim text.