Preparation method of high-plasticity TiNi51 alloy wire material
An alloy wire and high plasticity technology is applied in the field of preparation of high plasticity titanium-nickel shape memory alloy Ti-Ni51at% wire, which can solve the problems of poor alloy fluidity, inability to convert production costs into stable processes, and reduce material processing performance. The effect of improving plastic workability
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[0029] Example 1
[0030] The processing method of TiNi51 (Ti-Ni51at%) alloy Φ6.5mm wire: First, the raw material grade 0 sponge titanium and Ni9999 electrolytic nickel are mixed according to the ratio of Ti-Ni51at% (Ti-Ni56.06wt%), and then smelted at 25Kg intermediate frequency vacuum induction Φ100-15Kg primary titanium nickel alloy ingot. After cutting off the riser of one ingot and peeling the skin, 4 sets of welding electrodes are selected as consumable electrodes, and the weight is 45Kg. Φ160mm copper crucible is selected for smelting in vacuum consumable furnace to obtain Φ160-45Kg ingot. Then the ingot is homogenized at high temperature, the temperature is 950-1150℃, and the holding time is 4-6h. After forging and rolling, it is processed into a wire blank; finally, it is drawn and straightened to produce a finished wire.
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[0031] Example 2
[0032] The processing method of TiNi51 (Ti-Ni51at%) alloy Φ3.5mm wire: firstly mix the raw materials of grade 0 sponge titanium and Ni9999 electrolytic nickel according to the ratio of Ti-Ni51at% (Ti-Ni56.06wt%), and smelt at 25Kg intermediate frequency vacuum induction Φ100-15Kg primary titanium nickel alloy ingot. Cut off the riser of the primary ingot, and after peeling, select 10 for group welding as consumable electrodes, the weight is 110Kg. Φ160mm copper crucible is selected for smelting in vacuum consumable furnace to obtain Φ160-110Kg ingot. Then, the ingot is homogenized at high temperature, the temperature is 950-1150℃, and the holding time is 6-8h. After forging and rolling, it is processed into a wire blank; finally, it is drawn and straightened to produce a finished wire. The straightening process is temperature 800~950℃, speed 5~14mm / s, water cooling. The wire can realize an automatic line to Φ1.1mm once, and the cold deformation can reach mo...
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[0033] Example 3
[0034] The processing method of TiNi51 (Ti-Ni51at%) alloy Φ1mm wire: First, the raw material 0 grade sponge titanium and Ni9999 electrolytic nickel are mixed according to the ratio of Ti-Ni51at% (Ti-Ni56.06wt%), and the vacuum induction melting Φ100- at 25Kg intermediate frequency 15Kg primary titanium nickel alloy ingot. After cutting off the riser of the primary ingot and peeling the skin, select 14 consumable electrodes for group welding, with a weight of 150Kg. Φ160mm copper crucible is selected for smelting in vacuum consumable furnace to obtain Φ160-150Kg ingot. Then, the ingot is homogenized at high temperature, the temperature is 950-1150℃, and the holding time is 6-8h. After forging and rolling, it is processed into a wire blank; finally, it is drawn and straightened to produce a finished wire. Temperature 800~860℃, speed 10~20mm / s, water cooling.
[0035] Metallographic analysis of TiNi51at%-Φ2.0mm alloy wire prepared by the invention figure 1 , Be...
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