Method for preparing NiTi-fiber-enhanced 2219Al composite

A composite material and fiber-reinforced technology, applied in the field of preparing 2219Al composite materials, to achieve the effect of excellent strong plasticity

Active Publication Date: 2016-02-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention is to solve the existing methods for preparing unidirectionally arranged continuous nickel-titanium fiber reinforced 2219 aluminum alloy composite materials, which need to solv

Method used

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  • Method for preparing NiTi-fiber-enhanced 2219Al composite
  • Method for preparing NiTi-fiber-enhanced 2219Al composite
  • Method for preparing NiTi-fiber-enhanced 2219Al composite

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specific Embodiment approach 1

[0019] Embodiment 1: A method for preparing NiTi fiber-reinforced 2219Al composite material in this embodiment is carried out according to the following steps:

[0020] 1. Raw material treatment: ①Cut the 2219 aluminum sheet into a circle with a diameter of Φ by wire cutting method, and then use a NaOH solution with a concentration of 35g / L to 45g / L to alkali-wash the 2219 round aluminum sheet. The alkali-washing time is to remove 2219 Until the oil stain and oxide layer on the surface of the round aluminum sheet, take out the 2219 round aluminum sheet with a volume fraction of 5% HNO 3 Pickle the 2219 round aluminum sheet with the solution for 1min~3min, then ultrasonically clean the 2219 round aluminum sheet with absolute ethanol for 1min~3min, and finally take out the 2219 round aluminum sheet and place it in an oven with a temperature of 40~90℃ for 10min~20min, take it out Air-cooled to obtain the treated 2219 round aluminum sheet; ② Polish the surface of NiTi fiber with s...

specific Embodiment approach 2

[0028] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, the 2219 aluminum sheet is cut into Φ59.5mm×1mm discs by wire cutting method. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0029] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the concentration of the NaOH solution described in step 1 is 40 g / L. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a method for preparing a NiTi-fiber-enhanced 2219Al composite. The method aims at solving the problem that an existing method for preparing a continuous nickel-titanium fiber enhanced 2219 aluminum alloy composite which is arranged in one direction needs to achieve the purposes of regulating and controlling the fiber arrangement mode, the fiber content control, the material compacting, the interface reactions and the interface combining degrees. The method includes the first step of raw material processing, the second step of short NiTi fiber arrangement, the third step of vacuum hot pressing and sintering, and the fourth step of composite thermal treatment. A reaction layer with the thickness of about 1 micrometer is arranged between NiTi fiber and 2219Al alloy in the NiTi-fiber-enhanced 2219Al composite. The tensile strength is 305 MPa, the elongation is 23%, the excellent strength and plasticity are shown, and the method can be used for the fields of aviation, aerospace, machines, traffic, electronics and the like.

Description

technical field [0001] The invention relates to a method for preparing 2219Al composite material. Background technique [0002] The advantages of high plasticity, high toughness, low density and cheap price of aluminum alloy make it widely used in various fields of society. By introducing reinforcing materials into aluminum alloy and preparing composite materials, the moldability of aluminum alloy can be effectively improved. It is an effective way to expand its application in aerospace and other fields. Shape memory alloys (SMAs) are special alloys that can restore their original shape after deformation. Using their superelasticity or shape memory effect, they can be introduced into aluminum alloys as reinforcing materials, which can improve strength, toughness, increase damping performance, and have Functions for detecting cracks and suppressing crack growth, increasing damping, etc. [0003] However, the preparation of unidirectional continuous nickel-titanium fiber rei...

Claims

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Application Information

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IPC IPC(8): B32B37/06B32B37/10B32B37/24B32B15/01
CPCB32B15/017B32B37/06B32B37/1018B32B37/24B32B2262/103B32B2307/54B32B2309/02B32B2309/12B32B2311/24
Inventor 张学习商成耿林
Owner HARBIN INST OF TECH
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