Electronic method and device fo r drawing wire of elastic alloy

A technology of elastic alloy and alloy wire, which is applied in the direction of metal wire drawing, metal drawing forming tools, metal processing equipment, etc., can solve the problems of uneven structure and wire diameter, increased internal friction of alloy, high degree of texture, etc., to achieve Improve the uniformity and stability, improve the comprehensive mechanical properties, and improve the effect of plastic deformation ability

Inactive Publication Date: 2003-01-22
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The production shows that the disadvantages of the above-mentioned alloys are: ①The performance is too sensitive to the change of composition and heat treatment process parameters, so it is unstable; ②Due to the high strength, the γ solid solution matrix is ​​easy to precipitate intermetallic during deformation due to the high degree of alloying compound, the plasticity is not very good, especially the cold forming process performance is not good when the deformation is large, so the wire drawing must be frequently annealed in the middle, and the production efficiency is very low; The inhomogeneity of the diameter and the like causes the directionality, inconsistency and nonlinearity of the material elasticity; ④ The inhomogeneity of the structure and the like also increases the internal friction of the alloy and reduces the mechanical quality factor of the elastic alloy; ⑤ The surface condition of the repeatedly drawn wire product is not good , not smooth, with scratches and micro-cracks, greatly reducing the performance and service life of precision components, which has become a major problem in actual production and sales

Method used

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  • Electronic method and device fo r drawing wire of elastic alloy
  • Electronic method and device fo r drawing wire of elastic alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: 3J53 alloy electronic wire drawing The electronic wire drawing process parameters that can be used for drawing 3J53 alloy wire from φ2.3mm to φ0.66mm are:

[0029] (1) Current density: j=Imax / F=370~1500A / mm 2

[0030] (2) Working voltage: 250V

[0031] (3) Current pulse width tp=80~100μs

[0032] (4) Current pulse frequency f=50~500Hz

[0033] The lowest drawing speed of the alloy is 0.1m / s. Shrinkage rate (deformation rate) ε = 1-(d / d 0 ) 2 = 90%. Compared with traditional wire drawing, the deformation of electronic wire drawing increases, and the drawing force decreases by 30-40%. The intermediate annealing is canceled, and the surface quality is significantly improved (no cracks, high finish).

Embodiment 2

[0034] Embodiment 2: 317L steel wire electronic wire drawing

[0035] 317L steel wire drawn from φ1.60mm to φ0.12 can adopt the electronic wire drawing process parameters as follows:

[0036] (1) Current density: j=Imax / F=500~2000A / mm 2

[0037](2) Working voltage: 250V

[0038] (3) Current pulse width: tp=80~100μs

[0039] (4) Current pulse frequency: f=50~900Hz

[0040] The drawing speed of steel wire is 0.1m / s. Shrinkage rate (deformation degree) ε = 1-(d / d 0 ) 2 = 99.4%. Compared with traditional wire drawing, the deformation of electronic wire drawing is greatly increased, and the wire drawing force is reduced by 30-40%. The strength of the wire is reduced by 10%, the intermediate annealing (2-3 times) is completely canceled, and the surface quality is greatly improved.

Embodiment 3

[0041] Example 3: Cr17Ni6Mn3 steel wire electronic wire drawing

[0042] Cr17Ni6Mn3 steel wire drawn from φ2.00mm to φ0.226 can adopt electronic wire drawing process parameters as follows:

[0043] (1) Current density: j=Imax / F=350~1500A / mm 2

[0044] (2) Working voltage: 250V

[0045] (3) Current pulse width tp=80~100μs

[0046] (4) Current pulse frequency f=50~600Hz

[0047] The drawing speed of steel is 0.1-1m / s. Shrinkage rate (deformation degree) ε = 1-(d / d 0 ) 2 = 98.2%. Compared with traditional wire drawing, the deformation of electronic wire drawing increases, and the drawing force decreases by 20-40%. The internal stress in the wire is reduced by 5-6%, the strength is reduced by ~10%, and the surface quality is obviously improved.

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Abstract

A electronic method for drawing the wire of elastic alloy features that two electric connecting points are arranged at both ends of a die through which the alloy wire passes, and the electric current and voltage are applied across the said two electric connecting points, thus the wire of elastic alloy can be drawn. Its equipment is composed of a die and two pairs of upper and lower electric brushes. The metal wire to be treated passes through the first pair of electric brushes, the die and the second pair of electric brushes in sequence. Its advantages are high performance and quality of alloy wire, reduced or even no immediate annealing, high productivity and lower energy consumption.

Description

technical field [0001] The invention relates to an electronic wire drawing method and device for an elastic alloy, belonging to the technical field of metal material processing. Background technique [0002] Elastic alloys refer to alloys with high or constant elastic properties. They have the following characteristics: high and constant elastic modulus, small elastic limit, stable elastic modulus temperature coefficient and frequency temperature coefficient, high elastic storage energy, small elastic aftereffect and elastic hysteresis, high stress relaxation Resistance, high mechanical quality factor or low internal friction, etc. They are generally stainless alloys, and sometimes require other physical properties (such as good electrical conductivity, low expansion, non-magnetic, etc.). They are mainly used in the manufacture of instruments and meters, automation devices, precision machinery, and various components in precision measurement, communication, and computing t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C1/16B21C3/00B23H7/38
Inventor 郑明新姚可夫张华堂
Owner TSINGHUA UNIV
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