Gear, deceleration device, robot, and moving object
A technology of gears and sintered bodies, which is applied in the fields of reduction gears, gears, robots, and moving bodies, and can solve problems such as easy deformation of sintered parts and decreased dimensional accuracy of gears
Active Publication Date: 2018-01-16
SEIKO EPSON CORP
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Problems solved by technology
Therefore, the sintered part is easily deformed, resulting in a decrease in the dimensional accuracy of the gear
Method used
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Embodiment
[0285] Next, examples of the present invention will be described.
[0286] 1. Manufacture of sintered body (Zr-Nb system)
[0287] (Sample No.1)
[0288] [1] First, metal powders having the compositions shown in Table 1 produced by the water atomization method were prepared.
[0289] The compositions of the powders shown in Table 1 were identified (identified) and quantified by inductively coupled high-frequency plasma emission analysis (ICP analysis). In addition, an ICP device (CIROS120 type) manufactured by Nippon Rigaku (KK) was used for the ICP analysis. In addition, for identification and quantification of C, a carbon / sulfur analyzer (CS-200) manufactured by LECO Corporation was used. In addition, for identification and quantification of O, an oxygen / nitrogen analyzer (TC-300 / EF-300) manufactured by LECO Corporation was used.
[0290] [2] Next, a mixture (organic binder) of metal powder, polypropylene, and wax (organic binder) was weighed and mixed so that the mass r...
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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, one element selected from the group consisting of Ti, V, Y, Zr, Nb, Hf, and Ta is definedas a first element, when an element selected from the group, and having a higher group number in the periodic table than that of the first element or having the same group number as that of the firstelement and a higher period number than that of the first element is defined as a second element, the first element is contained in a proportion of 0.01 mass% or more and 0.7 mass% or less, and a second element is contained in a proportion of 0.01 mass% or more and 0.7 mass% or less.
Description
technical field [0001] The present invention relates to a gear, a reduction gear, a robot and a moving body. Background technique [0002] In powder metallurgy, after molding a composition containing a metal powder and a binder into a desired shape to obtain a molded body, the molded body is degreased and sintered to produce a sintered body. In the production process of such a sintered body, atomic diffusion occurs between particles of the metal powder, whereby the compact is gradually densified and sintered. [0003] For example, Patent Document 1 proposes a metal powder for powder metallurgy that contains Zr and Si, and the balance is composed of at least one selected from the group consisting of Fe, Co, and Ni and unavoidable elements. According to such a metal powder for powder metallurgy, sinterability is improved by the action of Zr, and a high-density sintered body can be easily produced. [0004] In recent years, the sintered body thus obtained is being widely used...
Claims
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IPC IPC(8): B22F5/08C22C38/00C22C38/02C22C38/08C22C38/12C22C38/14F16H55/06F16H55/17B22F1/00
CPCC22C1/053C22C1/055C22C33/0264C22C33/0285B22F2998/10B22F5/08C22C19/07C22C38/105C22C38/14B22F1/00B22F9/04B22F9/08B22F2009/0828B22F9/24B22F2003/023B22F3/24B22F3/1021C22C38/08C22C38/12B22F3/001B22F3/162B22F3/164B22F3/168F16H55/06
Inventor 中村英文
Owner SEIKO EPSON CORP