发明名称 |
Jet recirculation method for vacuum carburizing |
摘要 |
A method and apparatus for recirculation of atmosphere in a vacuum furnace which comprises a recirculation loop in which there is a low pressure line from the furnace chamber leading to a recirculation pump which pumps the recycled gas at a higher pressure to a high pressure line back into the furnace chamber. A means to analyze the furnace atmosphere is in communication with the high pressure line and signals its measurements of the atmosphere analysis to a valve on an enriching line. The enriching line passes enriched gas into either the high pressure line or the furnace chamber as the valve opens or closes. A means is provided to withdraw the gas from the furnace chamber in order to maintain the desired furnace chamber pressure as enriching gas is added.
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申请公布号 |
US4191598(A) |
申请公布日期 |
1980.03.04 |
申请号 |
US19780935491 |
申请日期 |
1978.08.21 |
申请人 |
MIDLAND-ROSS CORP |
发明人 |
CONYBEAR, JAMES G;TITUS, WALLACE J |
分类号 |
C23C8/22;C21D1/767;C21D1/773;F27B5/16;F27D7/06;F27D19/00;(IPC1-7):C21D1/48 |
主分类号 |
C23C8/22 |
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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