Extrusion method for molybdenum alloy seamless pipe
An extrusion method and seamless pipe technology, applied in the field of extrusion of molybdenum alloy seamless pipes
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[0034] Domestic companies require Mo tubes:
[0035] Material: Mo (Mo content≥99.95%, C content≤0.01%, N content, O content≤0.007%, Fe content, Ni content≤0.005%, Si content≤0.010%);
[0036] Specification: Φ172×26mm
[0037] Length: 3.2m
[0038] Density before extrusion: 9.0 g / cm 3
[0039] skills requirement:
[0040] Density reaches 10g / cm after extrusion 3 above;
[0041] Outer diameter tolerance: ±2.0mm;
[0042] Wall thickness tolerance: ±2.2mm;
[0043] The surface has no defects visible to the naked eye.
[0044] The embodiment of the extrusion method of this molybdenum alloy seamless pipe comprises the following steps in sequence:
[0045] Ⅰ Billet preparation
[0046] Using Φ277mm powder metallurgy billet, central through hole diameter: Φ60mm, length 800mm;
[0047] Ⅱ heating process
[0048] 5:00 A tube billet is heated in a ring furnace, and the temperature at the furnace entrance is 600±20°C;
[0049] Target temperature: 850±10°C; heating time: 260...
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