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Abstract: The welding torch of carbon-electrode arc constrained by
argon is made for bead welding of WC grain in order to decrease the
burning and depositing of hard metal alloys. The result shows that the
burning and depositing of hard metal alloys can be decreased obviously
in bead welding of WC grain by this welding torch.
Key words: Bead welding Welding torch Hard metal alloys
CLC No: TG442
Received 20011031, received in revised form 20020112
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