Method of cutting steel for machine structural use
AssigneeNippon Steel & Sumitomo Metal Corporation
InventorsToshiharu Aiso, Suguru Yoshida
Life of this patent
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Abstract
In the method of cutting steel for machine structural use, steel for machine structural use, in which chemical components contain, by mass %, 0.01% to 1.2% of C, 0.005% to 3.0% of Si, 0.05% to 3.0% of Mn, 0.001% to 0.2% of P, 0.001% to 0.35% of S, 0.002% to 0.035% of N and 0.05% to 1.0% of Al, in a case in which [Al%] and [N%] represent the mass % of Al and N in the steel respectively, [Al%]−(27/14)×[N%]≧0.05% is satisfied, is the other elements are included as necessary, and a balance consisting of Fe and inevitable impurities, is used, and a cutting process is carried out on the steel for machine structural use using water-insoluble cutting oil in which the amount of dissolved oxygen is 4 volume % to 16 volume %.
Claims5
A method of cutting a steel for machine structural use, wherein the steel comprises, by mass %,
- C:
- 0.01% to 1.2%,
- Si:
- 0.005% to 3.0%,
- Mn:
- 0.05% to 3.0%,
- P:
- 0.001% to 0.2%,
- S:
- 0.001% to 0.35%,
- N:
- 0.002% to 0.035%, and
- Al:
- 0.05% to 1.0%,
- wherein, [Al%] and [N%] representing mass % of Al and N in the steel respectively, the following formula 1 is satisfied,
- [Al%]−(27/14)×[N%]≧0.05% (1)
- and
- a balance consisting of Fe and inevitable impurities,
- the method comprising:
- a cutting process is carried out on the steel using a water-insoluble cutting oil in which an amount of dissolved oxygen is 4 volume % to 16 volume % so as to generate an oxide mainly including alumina on a tool, and
- wherein a supply amount of the water-insoluble cutting oil is 0.5 L/minute to 100 L/minute in the cutting process.
Dependencies are inferred from the claim text.