A method for forming tantalum alloy special-shaped parts

A technology for tantalum alloy and special-shaped parts, which is applied in the field of forming tantalum alloy special-shaped parts. The effect of the ear phenomenon

Active Publication Date: 2019-04-16
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method combines the hot stamping method and the spinning method. Firstly, the hot stamping method is used to make the tantalum alloy sheet preliminary shape, which reduces the influence of the anisotropy of the internal structure of the tantalum alloy sheet, and obtains the semi-finished product of the tantalum alloy special-shaped part, and then adopts the spinning method. Make the inner surface of the semi-finished tantalum alloy special-shaped parts fully fit with the spinning die, so as to ensure that the inner and outer surfaces of the spinning are thinned evenly, and solve the difficulty of stamping and forming in the process of preparing tantalum alloy special-shaped parts from tantalum alloy thick plates and the spinning size Problems that are difficult to control, improve the yield of tantalum alloy special-shaped parts, reduce production costs, and improve the surface quality of tantalum alloy special-shaped parts

Method used

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  • A method for forming tantalum alloy special-shaped parts
  • A method for forming tantalum alloy special-shaped parts
  • A method for forming tantalum alloy special-shaped parts

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Such as figure 2 As shown, in the forming process of TaNb3 special-shaped parts in this embodiment, the solid line indicates the stamping forming part, the dotted line indicates the spinning forming part, R 1 Indicates the top radius of the semi-finished TaNb3 special-shaped part.

[0026] This embodiment includes the following steps:

[0027] Step 1. Cut the TaNb3 plate obtained by cross rolling into a TaNb3 disc with a diameter of 500 mm and a thickness of 20 mm. After polishing the surface of the TaNb3 disc, heat it to 200 ° C and keep it warm for 10 minutes, and then stamp it in 2 passes , to obtain the TaNb3 special-shaped piece semi-finished product; the top radius R of the TaNb3 special-shaped piece semi-finished product 1 60mm, cone angle 90°;

[0028] Step 2. Place the TaNb3 special-shaped semi-finished product obtained in step 1 on a spinning machine for spinning, and use graphite mechanical oil mixture to lubricate. After 5 passes of cold spinning, a bull...

Embodiment 2

[0032] Such as image 3 As shown, in the forming process of TaNb20 special-shaped parts in this embodiment, the solid line indicates the stamping forming part, the dotted line indicates the spinning forming part, R 2 Indicates the top radius of the semi-finished TaNb20 special-shaped part.

[0033] This embodiment includes the following steps:

[0034] Step 1. Cut the TaNb20 plate obtained by cross-rolling into TaNb20 discs with a diameter of 325mm and a thickness of 15mm. After polishing the surface of the TaNb20 disc, heat it to 200°C and keep it warm for 10 minutes, and then stamp it in one pass , to obtain the semi-finished TaNb20 special-shaped piece; the top radius R of the semi-finished TaNb20 special-shaped piece 2 is 85mm, and the cone angle is 120°;

[0035] Step 2. Place the semi-finished TaNb20 special-shaped piece obtained in step 1 on a spinning machine for spinning, and use a graphite mechanical oil mixture to lubricate. After 7 passes of cold spinning, a TaN...

Embodiment 3

[0040] Such as Figure 5 As shown, in the forming process of TaW10 special-shaped parts in this embodiment, the solid line indicates the stamping forming part, and the dotted line indicates the spinning forming part, Φ 1 Indicates the outer diameter of the bottom of the semi-finished TaW10 special-shaped part.

[0041] This embodiment includes the following steps:

[0042] Step 1. Cut the TaW10 plate obtained by cross-rolling into TaW10 discs with a diameter of 200mm and a thickness of 13mm. Polish the surface of the TaW10 disc and apply an anti-oxidation coating, then heat to 600°C and keep it warm for 20min , and then through 3 times of stamping, the bowl-shaped TaW10 special-shaped semi-finished product is obtained; the bottom outer diameter of the bowl-shaped TaW10 special-shaped semi-finished product is Φ 1 80mm;

[0043] Step 2. Put the TaW10 special-shaped semi-finished product obtained in step 1 on a spinning machine for hot spinning, lubricate with graphite mechani...

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Abstract

The invention provides a forming method of a tantalum alloy special-shaped piece. The forming method includes the following steps of firstly, conducting polishing and hot stamping on the surface of analuminum alloy circular plate to obtain a tantalum alloy special-shaped piece semi-finished product; secondly, conducting cold spinning or hot spinning on the tantalum alloy special-shaped piece semi-finished product to obtain the tantalum alloy special-shaped piece blank; thirdly, sequentially cutting and machining the tantalum alloy special-shaped piece blank, and conducting vacuum annealing toobtain the tantalum alloy special-shaped piece. A tantalum alloy panel is primarily formed through a hot stamping method to obtain the tantalum alloy special-shaped piece semi-finished product, the inner surface of the tantalum alloy special-shaped piece semi-finished product and a spinning die are sufficiently attached through the spinning method, and therefore it is ensured that the inner surface and the outer surface are thinned evenly through spinning, the problems that the stamping forming is difficult and the spinning size is difficult to control when the tantalum alloy special-shaped piece is prepared from a tantalum alloy thick panel are solved, the yield of the tantalum alloy special-shaped piece is increased, and the surface quality of the tantalum alloy special-shaped piece isimproved.

Description

technical field [0001] The invention belongs to the technical field of tantalum alloy forming, and in particular relates to a forming method of a tantalum alloy special-shaped part. Background technique [0002] Tantalum and tantalum alloys have high density, high melting point, high strength, and excellent acid and alkali resistance and liquid metal corrosion resistance. They are widely used in chemical, aerospace, weaponry, electronics and other fields. Heat exchangers, shells, tubular heaters and thermowells in chemical equipment, as well as container equipment, pipelines, storage tanks, and transport tank heads for acid production are all lined with tantalum and tantalum alloys for corrosion protection. In the field of aerospace, tantalum alloys are used as rocket nozzle materials. In the field of weapons and equipment, tantalum alloy is used as the cover material of armor-piercing ammunition, which greatly improves the armor-piercing power of the penetrating body. In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B21D35/00
Inventor 林小辉梁静王晖李延超张小明王峰
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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