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US 2018/0009030 A1Published application
Gear, deceleration device, robot, and moving object
AssigneeSeiko Epson Corporation
InventorHidefumi NAKAMURA
Life of this patent
Estimating the term…
Abstract
A gear includes a sintered body, in which Fe is contained as a principal component, Ni is contained in a proportion of 2 mass % or more and 20 mass % or less, Si is contained in a proportion of 0.3 mass % or more and 5.0 mass % or less, C is contained in a proportion of 0.005 mass % or more and 0.3 mass % or less, and one element selected from the group consisting of Ti, V, Y, Zr, Nb, Hf, and Ta is defined as a first element, that is contained in a proportion of 0.01 mass % or more and 0.7 mass % or less.
Claims20
A gear, comprising a sintered body, in which
- Fe is contained as a principal component,
- Ni is contained in a proportion of 2 to 20 mass %,
- Si is contained in a proportion of 0.3 to 5.0 mass %,
- C is contained in a proportion of 0.005 to 0.3 mass %, and
- a first element is contained in a proportion of 0.01 to 0.7 mass %, and
- a second element is contained in a proportion of 0.01 to 0.7 mass %,
- wherein the first element is selected from the group consisting of Ti, V, Y, Zr, Nb, and Hf,
- and the second element is selected from the group consisting of Ti, V, Zr, Nb, Hf, and Ta, and
- (i) has a higher group number in the periodic table than the first element or
- (ii) has the same group number in the periodic table as the first element and a higher period number in the periodic table than the first element.
7 more elements
Dependencies are inferred from the claim text.