发明名称 |
PROCESS FOR HIGH QUALITY PLASMA ARC AND LASER CUTTING OF STAINLESS STEEL AND ALUMINUM |
摘要 |
Plasma arc or laser cutting uses a mix of reactive and reducing gas flows to cut sheets of stainless steel, aluminum and other non-ferrous metals. The reducing gas flow to the cut varies as a percentage of the total gas flow to maintain a reducing atmosphere down through the cut, but to leave a predominantly oxidizing atmosphere at the intersection of the cut and the bottom surface of the sheet being cut. In plasma arc cutting these flows can also be characterized as either a plasma gas flow, one that forms the arc, or a shield gas flow that surrounds the arc. The reactive gas is preferably a flow of air, oxygen, nitrogen, carbon dioxide or a combination of these gases. The reducing gas is preferably hydrogen, hydrogen 35, methane, or a mixture of these gases. For aluminum, the reactive gas is preferably air or nitrogen and the reducing gas is preferably methane or a mixture of methane and air. In laser cutting the reducing gases such as methane can be used by mixing them with reactive assist gases. |
申请公布号 |
EP0730506(B2) |
申请公布日期 |
2004.12.01 |
申请号 |
EP19940905365 |
申请日期 |
1993.12.10 |
申请人 |
HYPERTHERM, INC. |
发明人 |
COUCH, RICHARD, W.;SANDERS, NICHOLAS, A.;LU, ZHIPENG;LUO, LIFENG;STENFELT, STAFFAN, C., O. |
分类号 |
B23K10/00;B23K26/12;B23K26/14;B23K35/38 |
主分类号 |
B23K10/00 |
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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