WRe Ejecting Needles

WRe ejecting needles are made from precision straightened fine wire of tungsten-rhenium. Drawing is accomplished by pulling through progressively smaller dies and annealing the swaged rod. As the cross-sectional area of the wire decreases, the number of dislocations per unit area increases, the movement of dislocations is hindered, and the material is subjected to greater cold working, thus, the strength and hardness values increase systematically.

WRe ejecting needles photoWRe ejecting needles photo

The addition of rhenium to tungsten wire increases the recrystallization temperature and changes the grain structure after recrystallization. After alloying, the rhenium atoms displace the tungsten body-centered cubic lattice, causing the lattice to shrink, resulting in a denser material, where the rhenium atoms restrict dislocation movement, increasing strength, hardness and wear properties.

Rhenium also increases the ductility of the thimble. At 3% rhenium, the ductility of the tungsten-rhenium thimble is nearly 34%, while the ductility of the tungsten probe is about 8%. The alloy containing 3% rhenium refines the grain boundaries, thermally stabilizes the microstructure and improves penetration resistance, and imparts higher ductility, flexural strength, and hardness characteristics for longer service life.

Main Specifications

Main Specifications

Parameter

Parameter

Parameter

Diameter

0.7 mm (+/- 0.05 mm)

Standard

Length

12-17 mm (+/- 0.05 mm)

Customized

Taping Angle

10 degree (+/- 1 degree)

Customized

Tip Radius R

12-300 um

Customized

Product Specifications

(1) Rounding type

Main Specifications

Length
(mm)

Diameter
(mm)

Taping angle
(degree)

Tip Radius
(μm)

17

0.7

10

10

17

0.7

10

12

17

0.7

10

15

16

0.7

10

15

17

0.7

10

20

12

0.7

10

20

17

0.7

10

21

17

0.7

10

22

12

0.7

10

22

8

0.7

10

23

12

0.7

10

23

17

0.7

10

25

17

0.7

10

30

17

0.7

10

35

17

0.7

10

40

17

0.7

10

50

12

0.7

10

50

17

0.7

10

60

12

0.7

10

70

17

0.7

10

80

17

0.7

10

100

12

0.7

10

100

17

0.7

10

125

17

0.7

10

150

12

0.7

10

150

17

0.7

10

200

12

0.7

10

200

16

0.7

10

250

17

0.7

10

300

(2) Top-flat type

Main Specifications

Length
(mm)

Diameter
(mm)

Taping angle
(degree)

Top-flat
Ø(um)

17

0.7

10

16

17

0.7

10

18

17

0.7

10

20

12

0.7

10

20

12

0.7

10

23

17

0.7

10

30

17

0.7

10

40

17

0.7

10

50

12

0.7

10

50

9.2

0.7

10

50

12

0.7

10

60

12

0.7

10

70

17

0.7

10

80

17

0.7

10

100

12

0.7

10

100

10

0.7

10

100

17

0.7

10

125

17

0.7

10

150

17

0.7

10

175

17

0.7

10

200

15

0.7

10

200

17

0.7

10

250

17

0.7

10

300

17

0.7

10

500

If there is any interest in tungsten products, please feel free to contact us through the following methods.
Email: sales@chinatungsten.com
Tel.: +86 592 512 9696/+86 592 512 9595

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