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A kind of cold drawing prepares the method for cuznal or cuzn alloy continuous fiber

A continuous fiber and cold drawing technology, which is applied in the field of continuous fiber preparation of CuZnAl or CuZn alloy, can solve the problems of difficult preparation of fine fibers, low yield strength of CuZnAl or CuZn alloy, etc., and achieve grain refinement and increase of yield strength , fiber surface smooth effect

Active Publication Date: 2017-07-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the yield strength of CuZnAl or CuZn alloy is low and the preparation of fine fibers is difficult, the present invention proposes a method for preparing CuZnAl or CuZn alloy continuous fiber by cold drawing

Method used

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  • A kind of cold drawing prepares the method for cuznal or cuzn alloy continuous fiber
  • A kind of cold drawing prepares the method for cuznal or cuzn alloy continuous fiber
  • A kind of cold drawing prepares the method for cuznal or cuzn alloy continuous fiber

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specific Embodiment approach 1

[0037] Specific embodiment 1: The method for preparing CuZnAl or CuZn alloy continuous fiber by cold drawing in this embodiment is realized according to the following steps:

[0038] 1. Preparation of original ingot

[0039] According to molecular formula Cu x Zn y Al z or Cu x Zn y The mass fraction of each element in the formula, weigh pure copper, zinc and aluminum and mix them, or weigh pure copper and zinc and mix them, put them into a quartz tube with an inner diameter of 7-8mm and one end sealed, and reduce the pressure inside the quartz tube to 3×10 -2 ~5×10 -2 After Pa, seal the unsealed end of the quartz tube, then put the sealed quartz tube vertically into the resistance furnace, heat the air resistance furnace to 1240-1260°C and keep it warm for 40-60min, after completion, take out the quartz tube and place it side by side In water at room temperature, crush the quartz tube to obtain an original ingot with a diameter of 7-8mm;

[0040] 2. The original ingot...

specific Embodiment approach 2

[0055] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the molecular formula Cu described in step one x Zn y Al z where x=70.9, y=25.35; z=3.75. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0056] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the purity of pure copper in step 1 is 99.99%, the purity of zinc is 99.99%, and the purity of aluminum is 99.99%. Other steps and parameters are the same as one of the specific embodiments 1 to 4.

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Abstract

The invention discloses a method for manufacturing CuZnAl or CuZn alloy continuous fiber through cold drawing and relates to a manufacturing method for alloy fiber. The method aims at solving the problems that a CuZnAl or CuZn alloy is low in yield strength, and the difficulty for manufacturing small fiber of the CuZnAl or CuZn alloy is high. The method includes the steps that firstly, an original cast ingot is manufactured; secondly, the original cast ingot is subjected to hot extrusion to form a bar; thirdly, the bar is corroded; fourthly, cold drawing is conducted; fifthly, the alloy fiber with the target diameter are manufactured; and sixthly, the alloy fiber is annealed after cold drawing. By means of the method, the problem that the CuZnAl or CuZn alloy continuous fiber is low in yield strength under the room temperature condition, and consequently, shape memory, superelasticity and the damping characteristic are affected are solved; in addition, a cold drawing method is utilized for enabling the thick bar to be subjected to cold drawing to become the CuZnAl or CuZn alloy continuous fiber with the diameter being dozens of microns to hundreds of micrometers, and the problem that the difficulty of manufacturing the CuZnAl or CuZn alloy continuous fiber even in diameter and small in fiber is high is solved; and the method is suitable for manufacturing the CuZnAl or CuZn alloy continuous fiber.

Description

technical field [0001] The invention relates to a preparation method of CuZnAl or CuZn alloy continuous fiber. Background technique [0002] Smart materials that can sense external changes and respond to them have received more and more attention. Among them, shape memory alloys can change shape or output stress under the action of temperature or external force, and are widely used in mechanical, electronic, medical and other fields. CuZnAl alloy has excellent shape memory effect, superelasticity and damping characteristics; in addition, this material has a wide range of raw materials, low cost, and good plastic processing performance, which makes it have great potential in engineering applications. [0003] The key issue restricting the application of copper-zinc-aluminum alloy is its performance stability, including the stability of memory effect, superelasticity and damping performance, and the key to affecting performance stability is its yield strength: because the grai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/04C22C1/02C22F1/08B21C37/04
CPCB21C37/047C22C1/02C22C9/04C22F1/08
Inventor 张学习钱明芳万鑫浩李雅慧贠帆胡惠文李创耿林
Owner HARBIN INST OF TECH
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