A kind of preparation method of titanium powder or titanium alloy powder special for porous titanium film

A titanium alloy and porous titanium technology, which is applied in the field of preparation of titanium powder or titanium alloy powder for porous titanium film, can solve the problem of high-precision corrosion-resistant porous titanium and titanium alloy film, large particle size difference of titanium powder, powder Oxygen content and iron content are high, to avoid incomplete hydrogenation, improve the degree of hydrogenation embrittlement, and reduce the effect of oxygen content

Active Publication Date: 2020-04-17
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the mainstream preparation method of large quantities of titanium and titanium alloy powder is hydrogenation dehydrogenation (HDH). As the amount of material increases, the heat accumulated in a short period of time will increase accordingly, so that the temperature of titanium or titanium alloy will rise rapidly and melt, resulting in the material being impermeable to hydrogenation and not easy to break. The prepared powder is relatively coarse. In addition, the oxygen content of the powder and iron The content is also relatively high, which cannot meet the requirements of high-precision corrosion-resistant porous titanium and titanium alloy films
figure 1 is the SEM image of the titanium powder prepared by the prior art, from figure 1 It can be seen that the titanium powder prepared by the prior art has a large difference in size and particle size, the powder is relatively coarse, and the fine powder is attached to the particle, which is easy to cause oxidation, and even oxidizes, heats up and catches fire, and the fine powder is often an oxidized powder

Method used

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  • A kind of preparation method of titanium powder or titanium alloy powder special for porous titanium film
  • A kind of preparation method of titanium powder or titanium alloy powder special for porous titanium film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The furnace and the heating furnace shell of the dual-purpose heating furnace adopted in the preparation method of this embodiment can be freely separated. The two ends of the furnace are respectively the furnace door end and the airtight end. It is connected with the hydrogen gas inlet, a vacuum valve is arranged between the furnace door end and the vacuum system, and a hydrogen valve and a pressure gauge are arranged between the furnace door and the hydrogen gas inlet. The method includes the following steps:

[0035] Step 1. Press 3 kg of purified titanium scraps into shape to obtain titanium blocks, and then place the titanium blocks in the furnace of a dual-purpose heating furnace; washing and drying;

[0036] Step 2, open the vacuum valve of the dual-purpose heating furnace described in step 1, use a diffusion pump and use a mechanical pump as the backing pump to evacuate the furnace until the vacuum degree is 10 -3 Pa, then push the furnace from the closed end i...

Embodiment 2

[0044] The furnace and the heating furnace shell of the dual-purpose heating furnace adopted in the preparation method of this embodiment can be freely separated. The two ends of the furnace are respectively the furnace door end and the airtight end. It is connected with the hydrogen gas inlet, a vacuum valve is arranged between the furnace door end and the vacuum system, and a hydrogen valve and a pressure gauge are arranged between the furnace door and the hydrogen gas inlet. The method includes the following steps:

[0045] Step 1. Compress 100kg of titanium sponge to obtain a titanium block, and then place the titanium block in the furnace of a dual-purpose heating furnace;

[0046] Step 2, open the vacuum valve of the dual-purpose heating furnace described in step 1, use a diffusion pump and use a mechanical pump as a backing pump to evacuate the furnace until the vacuum degree is 10 -3 Pa, then push the furnace into the furnace shell from the closed end and heat it to 25...

Embodiment 3

[0054] The furnace and the heating furnace shell of the dual-purpose heating furnace adopted in the preparation method of this embodiment can be freely separated. The two ends of the furnace are respectively the furnace door end and the airtight end. It is connected with the hydrogen gas inlet, a vacuum valve is arranged between the furnace door end and the vacuum system, and a hydrogen valve and a pressure gauge are arranged between the furnace door and the hydrogen gas inlet. The method includes the following steps:

[0055] Step 1, press 10 kg of purified TC4 titanium alloy chips to obtain TC4 titanium alloy blocks, and then place the TC4 titanium alloy blocks in the furnace of a dual-purpose heating furnace; the purification treatment of the TC4 titanium alloy chips follows For sorting and separation, acid-base washing, water washing and drying;

[0056] Step 2. Open the vacuum valve of the dual-purpose heating furnace described in step 1, and use a diffusion pump and use ...

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Abstract

The invention discloses a preparation method of titanium powder or titanium alloy powder special for porous titanium film. The method comprises: 1. placing the pressed titanium block or titanium alloy block in a furnace; 2. vacuumizing the furnace and keeping it warm ; 3. Fill hydrogen into the furnace to carry out self-propagating hydrogenation reaction; 4. Titanium block or titanium alloy block absorb hydrogen and saturate to obtain titanium hydride block or titanium hydride block; 5. Crushing and sieving; 6. Coarse powder crushing; 7. Titanium powder or titanium alloy dehydrogenation powder obtained by heat preservation and dehydrogenation; 8. Titanium powder and titanium alloy powder obtained by crushing, sieving, magnetic separation and flotation. The present invention utilizes the heat released by the hydrogenation reaction to meet the heat energy supply required for the continuation of the hydrogenation reaction to carry out a self-propagating hydrogenation reaction, reducing the increase in heat generated by the reaction, avoiding incomplete hydrogenation of the titanium block or titanium alloy block, and improving the efficiency of the titanium block or titanium alloy block. The degree of hydrogenation embrittlement of titanium alloy block can finally obtain finer and uniform titanium powder or titanium alloy powder, which improves the quality of titanium powder or titanium alloy powder.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a preparation method of titanium powder or titanium alloy powder special for porous titanium membranes. Background technique [0002] The working conditions of hydrometallurgy are very harsh, not only to withstand the strong corrosion of many media, but also to bear a certain load. Many domestic hydrometallurgical enterprises are widely using porous titanium and titanium alloy membrane technology to improve or replace traditional filtration and separation devices. In addition, the current chlor-alkali, water treatment and other industries have a huge market demand for porous titanium anode membranes, and the annual demand for porous titanium anodes is about 5,000 tons. The liquid-solid separation of activated carbon and liquid in the "big infusion" of the pharmaceutical industry also requires high-quality porous titanium membranes with uniform pores and unif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/02B22F1/00
CPCB22F9/023B22F1/14
Inventor 李增峰谈萍赵少阳沈垒殷京瓯文佳艺皮艳霞
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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