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发表于 2009-5-26 08:44
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来自: 中国山东烟台
Air carbon arc gouging uses an electric arc maintained between
a consumable carbon-graphite electrode and the material
surface to be gouged or cut. The arc produces a high
temperature which melts a portion of the surface of the underlying
material, while a high velocity air jet is directed at the
arc, blowing away the molten metal. If the process is not carried
out correctly carburised metal will re-solidify in the
groove, and carburisation of the wall of the groove occurs.
Since air carbon arc gouging often is done manually, it is difficult
to maintain optimum conditions, subsequent grinding to
remove carburised metal is therefore considered necessary.
For ferritic steels, a depth of 1.5 mm should be removed. |
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