发明名称 |
Free machining steel for use in machine structure of excellent mechanical characteristics |
摘要 |
Free machining steel for use in machine structures capable of stably and reliably providing excellent machinability (chip disposability and tool life) and mechanical characteristics (transverse direction toughness) comparable, in a Pb free state, with existent Pb-added steels the machining steel being manufactured so as to contain 0.0005 to 0.02 mass % of Mg and provide a distribution index F1 for the sulfide particles defined by the following equation (1) of 0.4 to 0.65 or a distribution index for the sulfide particles defined by the following equation (2) of 1 to 2.5: <paragraph lvl="0"><in-line-formula>F1=X1/(A/n)½ (1), or </in-line-formula><paragraph lvl="0"><in-line-formula>F2=sigmaF/X2 (2) </in-line-formula>as described in the specification.
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申请公布号 |
US2002044878(A1) |
申请公布日期 |
2002.04.18 |
申请号 |
US20010931093 |
申请日期 |
2001.08.17 |
申请人 |
KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.) |
发明人 |
YAGUCHI HIROSHI;SHINDO YOSUKE;TSUCHIDA TAKEHIRO;KUDOU TAKAHIRO;KAISO MASATO;SOMEKAWA MASAMI |
分类号 |
C22C38/00;C22C38/02;C22C38/04;C22C38/60;(IPC1-7):C22C38/00 |
主分类号 |
C22C38/00 |
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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