Preparation method for powder-sintered porous metal body resistant to chlorine corrosion
A sintered metal and chlorine gas corrosion technology, which is applied in the field of powder sintered metal porous body preparation, can solve the problems of non-continuous production cost, long production cycle, complex process, etc., and achieve stable quality and pore structure, low production cost, The effect of simple preparation process
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[0023] Example 1:
[0024] Commercially used Ni powder, Cr powder and Fe powder with a particle size of 300 meshes were mixed in a mass ratio of 75:18:7. The powder was mixed on a V-type mixer for 10 hours. After the mixed powder was granulated and dried with stearic acid, it was pressed with a pressure of 100 MPa. 's green body. Then place the sample in a vacuum of 1×10 -3 Three-stage heat preservation sintering in the vacuum furnace of Pa. The first stage: the sintering temperature is raised from room temperature to 400°C, the heating rate is controlled at 5°C / min, and the temperature is kept at 400°C for 240 minutes; the second stage: the sintering temperature is raised to 400°C. to 750°C, the heating rate is controlled at 10°C / min, and the temperature is kept at 750°C for 180 minutes; the third stage: the sintering temperature is raised to 1200°C, the heating rate is controlled at 3°C / min, and the temperature is kept at 1200°C for 300 minutes. minutes; after sintering,...
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[0031] Example 2:
[0032] The commercial Ni powder with a particle size of 100 mesh, and the Cr powder and Fe powder with a particle size of 300 mesh were mixed in a mass ratio of 80:15:5. The powder was mixed on a V-type mixer for 10 hours, and the mixed powder was granulated and dried with stearic acid, and then pressed with a pressure of 250 MPa. 's green body. Then place the sample in a vacuum of 1×10 -2 Three-stage heat preservation sintering in the vacuum furnace of Pa. The first stage: the sintering temperature is raised from room temperature to 450°C, the heating rate is controlled at 10°C / min, and the temperature is kept at 450°C for 120 minutes; the second stage: the sintering temperature is raised to 450°C. to 850°C, the heating rate is controlled at 5°C / min, and the temperature is kept at 850°C for 90 minutes; the third stage: the sintering temperature is raised to 1350°C, the heating rate is controlled at 3°C / min, and the temperature is kept at 1350°C for 180 ...
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[0034] Example 3:
[0035] The commercial particle size is 300 mesh Ni powder, Cr powder and Fe powder are mixed according to the mass ratio of 78:14:8. The powder was mixed on a V-type mixer for 10 hours. After the mixed powder was granulated and dried with stearic acid, it was pressed with a pressure of 150 MPa. 's green body. Then place the sample in a vacuum of 5.6×10 -3 Three-stage heat preservation sintering in the vacuum furnace of Pa. The first stage: the sintering temperature is raised from room temperature to 430 °C, the heating rate is controlled at 6 °C / min, and the temperature is kept at 430 °C for 180 minutes; the second stage: the sintering temperature is increased to 800°C, the heating rate is controlled at 6°C / min, and the temperature is kept at 800°C for 120 minutes; the third stage: the sintering temperature is raised to 1300°C, the heating rate is controlled at 4°C / min, and the temperature is kept at 1300°C for 240 minutes; after sintering, the product ...
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