Preparation method of porous vanadium-chromium-titanium material

A vanadium-chromium-titanium and mixing technology, which is applied in the field of powder metallurgy, can solve the problems of high cost, complex process, and low efficiency, and achieve the effect of low cost, simple production process, and uniform structure

Inactive Publication Date: 2018-03-23
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology is more complex in the production of porous V-Cr-Ti alloys, such as the use of 3D printing technology, which has low efficiency and high cost, and is not suitable for mass production. Therefore, it is necessary to study a new preparation method

Method used

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Examples

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Effect test

preparation example Construction

[0015] A preparation method of a porous vanadium-chromium-titanium material, comprising the following steps:

[0016] a, mixing materials, putting metal titanium powder, chromium powder, metal vanadium powder and pore-forming agent into a ball mill tank and mixing powder to obtain mixed powder, the mass percentage of metal powder in the mixed powder is about 70% to 50%, making The mass percentage of the porogen is about 30% to 50%;

[0017] b. Cold press molding, put the mixed powder obtained in the previous step into the abrasive tool, perform cold press molding under a unidirectional pressure of 100-150MPa, and obtain a compact after ejecting the mold;

[0018] c. Vacuum sintering, put the above-mentioned compact into the charging tank, cover the lid, and vacuumize to make the vacuum reach 10 -3 After Pa, start sintering, the sintering temperature is 900-1200°C, the holding time is 1-3h, and finally the desired porous vanadium-chromium-titanium material is obtained.

[001...

Embodiment 1

[0024] The pore-forming agent ammonium bicarbonate is sieved to obtain a particle size of about 80-100 μm. The mass ratio of ammonium bicarbonate pore-forming agent to metal mixed powder is 3:1. After mixing evenly, add it to a stainless steel abrasive tool, and use a one-way hydraulic universal testing machine to press and form it. The forming pressure is 80 MPa, and the pressure is maintained for 1 minute to obtain a green body. Place the green body in a vacuum of 10 -3 Sinter in a Pa vacuum sintering furnace, the sintering temperature is 900°C, the holding time is 2h, and the porous material is obtained by cooling with the furnace.

Embodiment 2

[0026] The pore-forming agent ammonium bicarbonate is sieved to obtain a particle size of about 80-100 μm. The mass ratio of ammonium bicarbonate pore-forming agent to metal mixed powder is 2:1. After mixing evenly, add it to the stainless steel grinding tool. Then add the mixed powder into a stainless steel abrasive tool, and use a one-way hydraulic universal testing machine to press and form the mold with a molding pressure of 100 MPa, and hold the pressure for 1 minute to obtain a green body. Place the green body in a vacuum of 10 -3 Sinter in a Pa vacuum sintering furnace, the sintering temperature is 1100°C, the holding time is 2h, and the porous material is obtained by cooling with the furnace.

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Abstract

The invention discloses a preparation method of a porous vanadium-chromium-titanium material in the field of powder metallurgy. The preparation method comprises the following steps of material mixing,wherein metal titanium powder, chromium powder, metal vanadium powder and a pore former are put in a ball grinding tank for powder mixing to obtain mixed powder, and in the mixed powder, the mass percent of metal powder ranges from 50%-70%, and the mass percent of the pore former ranges from 30%-50%; cold press molding, wherein the mixed powder obtained in the previous step is contained in a grinding tool, cold press molding is carried out under the unidirectional pressure ranging from 100 MPa to 150 MPa, and a press blank is obtained after mold return; and vacuum sintering, wherein the abovepress blank is put in a charge tank, the charge tank is covered with a cover, vacuumizing is carried out, sintering is started after vacuum reaches 10<-3> Pa, the sintering temperature ranges from 900 DEG C to 1,200 DEG C, the soaking time ranges from 1 h to 3 h, and finally the needed porous vanadium-chromium-titanium material is obtained. The preparation method is simple in process and low in cost, the porosity and the pore size of a product can be controlled, and the porous material uniform in structure can be obtained.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a method for preparing a porous vanadium-chromium-titanium material. Background technique [0002] In the 1960s, especially since the 1980s, material workers at home and abroad have done a lot of research work on porous metal materials. The study found that in addition to the basic metal properties such as the weldability of metal materials, metal porous materials exhibit many excellent properties due to a large number of internal pores, such as light weight, large specific surface area, good energy absorption, Low thermal conductivity (closed-cell body), high heat transfer and heat dissipation capacity (through-hole body), good sound absorption (through-hole body), excellent permeability (through-hole body), good electromagnetic wave absorption (through-hole body), and Flame, heat and fire resistance, thermal shock resistance, gas sensitivity, regeneration, good processability,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/11
CPCB22F3/1125B22F3/1134B22F2201/20B22F2998/10B22F2009/043B22F3/02B22F3/1007
Inventor 龙秀丽彭穗陈勇韩慧果
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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