Ultrafine titanium powder and its preparation method
A technology of titanium powder and titanium sponge, which is applied in the field of ultra-fine titanium powder and its preparation, can solve the problems of low production efficiency and easy introduction of impurities, and achieve the effects of high bonding force, uniform coating thickness and fine grains
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Embodiment 1
[0038] (1) Select titanium sponge particles with a purity of 99.5%, use a hydrogen reduction furnace, heat to 1200°C, and keep a vacuum of 10 -2 Pa, heat preservation for 4 hours to reduce the titanium particles;
[0039] (2) Physical vapor deposition method: heat the titanium particles obtained in step (1) until the metal titanium is vaporized, the heating temperature is 5000°C, the heating time is 1 hour, and then quenched at 60°C to condense it into spherical titanium metal powder , That is, its D50 is 0.77μm.
[0040] SEM test on ultra-fine titanium powder, see the results figure 1 .
[0041] Further, the ultrafine titanium powder of Example 1 was sprayed on the surface of the carbon steel substrate by plasma spraying to prepare a surface anti-corrosion coating, and the scanning electron microscope in the thickness direction of the coating was as follows: figure 2 ; Then detect the coating performance by means of surface observation, SEM observation, salt water corrosi...
Embodiment 2
[0043] (1) Select titanium sponge particles with a purity of 99.999%, use a hydrogen reduction furnace, heat to 1300°C, and maintain a vacuum of 6.67×10 -2 Pa, heat preservation for 2 hours to reduce the titanium particles;
[0044] (2) Physical vapor deposition method: heat the titanium particles obtained in step (1) until the titanium metal is vaporized, the heating temperature is 5000°C, the heating time is 1.5 hours, and then quenched at 20°C to condense it into spherical titanium metal powder , that is, its D50 is 5.77 μm.
[0045] SEM test on ultra-fine titanium powder, see the results Figure 4 .
[0046] Further, the ultra-fine titanium powder of Example 2 was sprayed on the surface of the carbon steel substrate by plasma spraying to prepare a surface anti-corrosion coating; then the coating performance was detected by means of surface observation, SEM observation, salt water corrosion, etc. The results are shown in the table 1 and Figure 5 .
Embodiment 3
[0048] (1) Select titanium sponge particles with a purity of 99.9%, use a hydrogen reduction furnace, heat to 1400°C, and maintain a vacuum of 1.0×10 -3 Pa, heat preservation for 10 hours to reduce the titanium particles;
[0049] (2) Physical vapor deposition method: heat the titanium particles obtained in step (1) until the titanium metal is vaporized, the heating temperature is 15000 ° C, the heating time is 2 hours, and then quenched at 400 ° C to condense it into spherical titanium metal powder , That is, its D50 is 6.65 μm.
[0050] SEM test on ultra-fine titanium powder, see the results Figure 6 .
[0051] Further, the ultra-fine titanium powder of Example 3 was sprayed on the surface of the carbon steel substrate by plasma spraying to prepare a surface anti-corrosion coating; then the coating performance was detected by means of surface observation, SEM observation, salt water corrosion, etc. The results are shown in the table 1 and Figure 7 .
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Abstract
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