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US 2015/0191670 A1Published application
Powder lubricant composition and method for manufacturing seamless steel pipe
AssigneeNippon Steel & Sumitomo Metal Corporation
InventorsSumio Iida, Masami Imamura, Takayuki Fukushima
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Abstract
A powder lubricant composition according to the present invention includes 65 parts by mass to 95 parts by mass of sodium borate, and 5 parts by mass to 35 parts by mass of cryolite. A method for manufacturing a seamless steel pipe according to the present invention includes adhering the above-described powder lubricant composition to a pipe inner surface of a work piece which is piercing rolled to have a tubular shape, and elongation rolling on the work piece after the adhering of the powder lubricant composition.
Claims9
A powder lubricant composition comprising:
- 65 parts by mass to 95 parts by mass of sodium borate;
- and
- 5 parts by mass to 35 parts by mass of cryolite.
Dependencies are inferred from the claim text.