Vacuum consumable arc melting alloy TZM
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- Category: Molybdenum knowledge
- Published on 25 March 2015
- Written by limei
- Hits: 349
Vacuum consumable arc melting refers under vacuum induction melting furnace or other mechanical means of production from the power solution is heated by a controllable AC arc melting. Vacuum consumable arc melting TZM alloy has the advantage that the arc temperature vacuum degassing can be achieved under the metal, oxygen and removal of impurities in the process to obtain pure metallic material billets.
An important factor in the use of this technology TZM alloy melting, smelting system current and voltage when the impact their quality of alloy melting speed is a manifestation of the heat balance, it basically depends on the size of the melting current. TZM alloy smelting general current density is relatively large, almost similar to the type of steel ingot current density of 10 to 15 times, while the melting rate (kg / min * kA), but only one-third to half of steel one.
Because when TZM alloy smelting high current density, heat concentration, it requires a strong crystalline water-cooled wall effects to quickly take away the electrode and the weld pool solidification heat of fusion heat to melt crystallization does not wear and smooth melting. Mold cooling water flow layer is preferably about 10 mm, the water pressure can be 20 to 30 kg / cm.
TZM alloy before and after the melting of titanium, zirconium content vary, titanium burning rate of 3% -20%, and zirconium in combination amount of generally about fluctuations.
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