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Preparation method of high-strength and high-toughness Cu-Nb-Cu composite wire

A cu-nb-cu, composite wire technology, applied in the direction of manufacturing tools, metal rolling, metal rolling, etc., can solve the problems of limiting material properties, difficult to make new breakthroughs in tensile strength, etc., to improve processing efficiency , high-intensity, easy-to-use effects

Pending Publication Date: 2022-06-21
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Affected by the work hardening of the material, the Cu-Nb composite wire prepared by the cluster drawing technology is close to the theoretical processing limit, and it has been difficult to make new breakthroughs in the tensile strength. More importantly, there is an inverted relationship between strength and conductance. , which limits the improvement of material performance
Due to the lack of Cu-Nb composite wire with better comprehensive performance as the magnet conductor material, my country's pulsed strong magnetic field has not achieved new breakthroughs, and the record is still at the level of 5 years ago

Method used

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  • Preparation method of high-strength and high-toughness Cu-Nb-Cu composite wire
  • Preparation method of high-strength and high-toughness Cu-Nb-Cu composite wire
  • Preparation method of high-strength and high-toughness Cu-Nb-Cu composite wire

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment includes the following steps:

[0029] Step 1. Anneal the Nb tube reinforced Cu-Nb with a diameter of Φ7.74mm prepared by the cluster drawing method, that is, the Cu-Nb-Cu tertiary composite wire. The temperature of the annealing treatment is 650°C and the time is 4h, and then the hole is drilled. The shape is rolled to a diameter of Φ4.35mm, and the total deformation of the pass rolling is 68%;

[0030] Step 2: Immerse the Cu-Nb-Cu tertiary composite wire rod after pass rolling in step 1 in a foam tank equipped with liquid nitrogen for cooling for 1 min;

[0031] Step 3: The Cu-Nb-Cu tertiary composite wire that has been cooled in step 3 is plastically drawn to a diameter of Φ2.60 mm through a drawing die in turn to obtain a high-strength and high-toughness Cu-Nb-Cu composite wire; The processing rate of drawing passes is 8%, and the diameters of the drawing die used are: Φ4.35mm, Φ4.12mm, Φ4.08mm, Φ3.95mm, Φ3.64mm, Φ3.35mm, Φ3.12mm, Φ3. 08mm, Φ2.95mm...

Embodiment 2

[0036] This embodiment includes the following steps:

[0037] Step 1. Anneal the Nb tube reinforced Cu-Nb with a diameter of Φ7.74mm prepared by the cluster drawing method, that is, the Cu-Nb-Cu tertiary composite wire. The temperature of the annealing treatment is 700°C and the time is 4h. The shape is rolled to a diameter of Φ4.35mm, and the total deformation of the pass rolling is 68%;

[0038] Step 2: Immerse the Cu-Nb-Cu tertiary composite wire rod after pass rolling in step 1 in a foam tank equipped with liquid nitrogen for cooling for 1 min;

[0039] Step 3: The Cu-Nb-Cu tertiary composite wire after cooling in step 3 is plastically drawn to a diameter of Φ2.39mm through a drawing die in turn to obtain a high-strength and high-toughness Cu-Nb-Cu composite wire; The processing rate of drawing passes is 7%, and the diameters of the drawing die used are: Φ4.12mm, Φ4.08mm, Φ3.95mm, Φ3.64mm, Φ3.35mm, Φ3.12mm, Φ3.08mm, Φ2. 95mm, Φ2.83mm, Φ2.71mm, Φ2.60mm, Φ2.49mm, Φ2.39mm, ...

Embodiment 3

[0044] This embodiment includes the following steps:

[0045] Step 1. The Nb tube reinforced Cu-Nb with a diameter of Φ8.66mm prepared by the cluster drawing method, that is, the Cu-Nb-Cu tertiary composite wire, is annealed. The shape is rolled to a diameter of Φ4.35mm, and the total deformation of the pass rolling is 72%;

[0046] Step 2, soaking the Cu-Nb-Cu tertiary composite wire rod after pass rolling in step 1 in a foam tank equipped with liquid nitrogen for cooling for 2min;

[0047] Step 3: The Cu-Nb-Cu tertiary composite wire that has been cooled in step 3 is plastically drawn to a diameter of Φ2.02 mm through a drawing die in turn to obtain a high-strength and high-toughness Cu-Nb-Cu composite wire; The processing rate of the drawing passes is 9%, and the diameters of the drawing die used are: Φ4.12mm, Φ4.08mm, Φ3.95mm, Φ3.64mm, Φ3.35mm, Φ3.12mm, Φ3.08mm, Φ2. 95mm, Φ2.83mm, Φ2.71mm, Φ2.60mm, Φ2.49mm, Φ2.39mm, Φ2.12mm, Φ2.02mm, and the wire to be drawn must be plac...

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Abstract

The invention discloses a preparation method of a high-strength and high-toughness Cu-Nb-Cu composite wire, which comprises the following steps of: 1, carrying out annealing treatment on an Nb tube reinforced Cu-Nb, namely a Cu-Nb-Cu three-time composite wire prepared by adopting a bundling drawing method, and then carrying out groove rolling; 2, soaking the Cu-Nb-Cu three-time composite wire subjected to pass rolling in a foam tank filled with liquid nitrogen for cooling; and thirdly, the cooled Cu-Nb-Cu tertiary composite wire is subjected to plastic drawing, and the high-strength and high-toughness Cu-Nb-Cu composite wire is obtained. According to the method, the process of combining groove rolling with liquid nitrogen temperature zone drawing is adopted, the plastic deformation capacity of the Cu-Nb-Cu composite wire is improved, the superfine Cu-Nb-Cu composite wire is obtained, high strength is obtained, meanwhile, high toughness is achieved, the inversion relation between the material strength and plasticity is regulated and controlled, the process cost is saved, and batch production is easy to achieve.

Description

technical field [0001] The invention belongs to the technical field of wire rods, and in particular relates to a preparation method of a high-strength and high-toughness Cu-Nb-Cu composite wire rod. Background technique [0002] When conducting research on pulsed magnets and electromagnetic weapon devices, the biggest problem is the magnetic field force, that is, when the current passes through the conductor material in the magnet, a very strong Lorentine magnetic force will be generated, and a large amount of Joule heat will be released at the same time. It is required that the magnet conductor material has sufficient tensile strength to resist the Loren magnetic force, and at the same time, it must match good electrical conductivity, and the conductor material has bendability (generally, the bending diameter is required to be less than 10mm). Therefore, the selection of magnet conductor materials with well-matched mechanical and electrical properties is one of the hardware...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/04B21B45/02B21C9/00C22F1/08C21D9/52
CPCB21C37/04B21B45/0224B21C9/00C22F1/08C21D9/525
Inventor 王鹏飞梁明贾佳林马小波徐晓燕李建峰
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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