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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

Inactive Publication Date: 2016-01-20
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However crude TiCl 4 Distillation and purification are time-consuming operations. Since the development of this process in 1948, it has been criticized for its complicated process, long production cycle, non-continuous operation and high production cost.

Method used

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  • Preparation method for powder-sintered porous metal body resistant to chlorine corrosion
  • Preparation method for powder-sintered porous metal body resistant to chlorine corrosion
  • Preparation method for powder-sintered porous metal body resistant to chlorine corrosion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Commercially used Ni powder, Cr powder and Fe powder with a particle size of 300 mesh were mixed according to the mass ratio of 75:18:7. The powder is mixed on a V-type mixer for 10 hours. After the mixed powder is granulated and dried with stearic acid, it is pressed with a pressure of 100MPa. green body. Then put the sample in a vacuum of 1×10 -3 Three-stage heat preservation and sintering in a 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 750°C, the heating rate is controlled at 10°C / min, and held 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 held at 1200°C for 300 Minutes; after sintering, the product is obtained by cooling with the furnace.

[0025] The sint...

Embodiment 2

[0032] Mix commercial Ni powder with a particle size of 100 mesh, Cr powder and Fe powder with a particle size of 300 mesh at a mass ratio of 80:15:5. The powder is mixed on a V-type mixer for 10 hours. After the mixed powder is granulated and dried with stearic acid, it is pressed with a pressure of 250MPa. green body. Then put the sample in a vacuum of 1×10 -2 Three-stage heat preservation and sintering in a 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 increased To 850°C, the heating rate was controlled at 5°C / min, and kept at 850°C for 90 minutes; the third stage: the sintering temperature was raised to 1350°C, the heating rate was controlled at 3°C / min, and kept at 1350°C for 180 Minutes; after sintering, the product is obtained by cooling with the furnace.

[00...

Embodiment 3

[0035] Commercially used Ni powder with a particle size of 300 mesh, Cr powder and Fe powder were mixed according to the mass ratio of 78:14:8. The powder is mixed on a V-type mixer for 10 hours. After the mixed powder is granulated and dried with stearic acid, it is pressed with a pressure of 150MPa. green body. Then put the sample in a vacuum of 5.6×10 -3 Three-stage heat preservation and sintering in a 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 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 kept at 1300°C for 240 Minutes; after sintering, the product is obtained by cooling with the furnace.

[0036]The s...

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Abstract

The invention discloses a preparation method for a powder-sintered porous metal body resistant to chlorine corrosion. The preparation method mainly comprises the steps that (1) mixed powder is prepared, that is, 75%-80% by mass of Ni powder, 12%-18% by mass of Cr powder and 2%-13% by mass of Fe powder are mixed; (2) cold press molding is carried out, that is, the mixed powder obtained in the step (1) is pelletized, dried and molded, and a pressed blank is obtained through cold press molding; and (3) sintering is carried out, that is, the pressed blank obtained in the step (2) is sintered in three stages under the vacuum condition of 1*10<-2> to 1*10<-3> Pa. The preparation method is used for the powder-sintered porous metal body which is resistant to chlorine corrosion, has abundant pores and is relatively large in pore diameter. A porous material with abundant pores is made of the Ni powder, the Cr powder and the Fe powder, and filtering in titanium sponge production is achieved by means of the excellent chlorine corrosion resistance of the porous material.

Description

technical field [0001] The invention belongs to the technical field of preparation of porous materials, and in particular relates to a preparation method of a powder sintered metal porous body resistant to chlorine gas corrosion. Background technique [0002] Titanium and its alloys have a series of advantages such as low density, high specific strength, good heat resistance and corrosion resistance, so they have been widely used in aerospace, national defense, petroleum industry, ocean, energy, transportation, chemical industry, sports, medical treatment , civil and many other fields. Titanium is one of the most abundant elements in the earth's crust. my country's titanium resources are rich, large, and widely distributed. The proven reserves of titanium resources in Panxi, Sichuan and Chengde, Hebei are about 1 / 4 of the world's total. However, due to the strong affinity between titanium and oxygen, nitrogen, carbon, hydrogen and other elements, the production process of t...

Claims

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Application Information

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IPC IPC(8): C22C1/08
Inventor 肖逸锋刘艳汤智吴靓许艳飞郭小花徐阳
Owner XIANGTAN UNIV
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