发明名称 |
Sintered gear with an area of high density and production method therefor |
摘要 |
<p>A sintered gear comprises: plural tooth portion having a tooth flank and a tooth bottom land; a high density area formed over entire surface of the tooth portion, the high density area having a density of 7.6 Mg/m3 or more and formed with a depth of 1mm or more from the surface; a low density area formed in deeper area than the high density area, the low density area having a density of 7.3 Mg/m3 or less; and an intermediate area formed between the high density area and the low density area, the intermediate area having a density gradient in which the density is gradually decreased from the high density area to the low density area.
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申请公布号 |
EP1839780(A3) |
申请公布日期 |
2007.12.12 |
申请号 |
EP20070006405 |
申请日期 |
2007.03.28 |
申请人 |
HITACHI POWDERED METALS CO., LTD. |
发明人 |
ICHIKAWA, JUNICHI;KOHIDA, TOMOYUKI;NAKATA, KENSUKE;ARAKAWA, TOMOAKI |
分类号 |
B22F3/02;B22F3/10;B22F3/16;B22F3/24;B22F5/08;F16H55/06 |
主分类号 |
B22F3/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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