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Method for laser-induced self-propagating connection between carbon fiber reinforced aluminum-based composite and metal

A technology for strengthening aluminum matrix and composite materials, which is used in laser welding equipment, welding/cutting media/materials, metal processing equipment, etc. It can solve the problems of deteriorating base metal performance, severe interface reaction, and high heating temperature, and maintain excellent characteristics. , the effect of good connection quality

Inactive Publication Date: 2012-09-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the traditional welding method has a high overall heating temperature, which leads to serious interfacial reaction between the reinforced phase carbon fiber and aluminum, and deteriorates the performance of the base material, and provides a laser-induced self-propagating joint carbon fiber reinforced aluminum substrate. Composite and Metal Approaches

Method used

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  • Method for laser-induced self-propagating connection between carbon fiber reinforced aluminum-based composite and metal
  • Method for laser-induced self-propagating connection between carbon fiber reinforced aluminum-based composite and metal
  • Method for laser-induced self-propagating connection between carbon fiber reinforced aluminum-based composite and metal

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specific Embodiment approach 1

[0012] Specific embodiment 1: A method for laser-induced self-propagating connection of carbon fiber reinforced aluminum matrix composites and metals in this embodiment is carried out according to the following steps: 1. 35-39 parts by weight of titanium powder, 58- Mix 62 parts of aluminum powder and 2~4 parts of nano-carbon powder evenly, put them in the ball mill tank, put the balls in the ratio of ball to material mass ratio of 5:1, and under the condition of argon protection, use 300~ Ball milling at a speed of 500r / min for 2-3 hours to obtain mixed powder; 2. Press the mixed powder obtained in step 1 into an intermediate laminate compact with a relative density of 60%-80% and a thickness of 1-3mm, and seal it for storage; 3. The intermediate laminate obtained in step 2 is placed between the carbon fiber reinforced aluminum matrix composite material and the metal to assemble a "sandwich" assembly, and then the assembly is clamped and placed in the laser equipment. Under th...

specific Embodiment approach 2

[0014] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the particle size of the nano-carbon powder in Step 1 is 12500 mesh. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0015] Embodiment 3: This embodiment differs from Embodiments 1 to 2 in that: the titanium powder in step 1 is 325-1000 mesh, and the aluminum powder is 325-1000 mesh. Others are the same as the specific embodiment 1 to 2.

[0016] Verify effect of the present invention by following test:

[0017] A method for laser-induced self-propagating connection of carbon fiber reinforced aluminum matrix composites and metals in this test is carried out in accordance with the following steps: 1. Weigh 3.7g of titanium powder, 6.0g of aluminum powder and 0.3g of nano-carbon powder and mix Evenly, put it in a ball mill jar, put balls in the ratio of ball to material mass ratio of 5:1, and ball mill at a speed of 300r / min for 2.5h under the protection of argon to obtain a mixed powder; 2. 1. The obtained mixed powder is pressed into an intermediate laminate compact with a relative density of 70% and a thickness of 1 mm, which is sealed and stored; 3. The intermediate laminate compact obtai...

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Abstract

The invention discloses a method for laser-induced self-propagating connection between carbon fiber reinforced aluminum-based composite and metal, relates to a method for connecting aluminum-based composite and the metal, and aims to solve the problems of serious interface reaction between reinforced phase carbon fibers and aluminum and parent metal performance deterioration caused by overall high heating temperature in the conventional welding method. The method comprises the following steps of: 1, uniformly mixing and ball-milling titanium powder, aluminum powder and nano-carbon powder to obtain mixed powder; 2, pressing the mixed powder into an intermediate layer compact with relative density of 60 to 80 percent and thickness of 1 to 3mm, and sealing and storing the intermediate layer compact; and 3, placing the intermediate layer compact between the carbon fiber reinforced aluminum-based composite and the metal to obtain a sandwich, igniting the intermediate layer compact by using laser, and stopping a laser to finish the laser-induced self-propagating connection. The self-propagating heating intermediate layer compact is used for realizing the connection by adopting a laser ignition technology, and the joint strength reaches 30.5MPa. The method is applied to the field of connection between the carbon fiber reinforced aluminum-based composite and the metal.

Description

technical field [0001] The invention relates to a method for connecting aluminum-based composite materials and metals. Background technique [0002] Aluminum matrix composites have high specific strength, specific stiffness, axial tensile strength and wear resistance, excellent high temperature resistance and low thermal expansion coefficient, good electrical conductivity, thermal conductivity, fatigue resistance, and good resistance to moisture or radiation It is an ideal lightweight and high-strength material due to its good dimensional stability in the environment. The density of carbon fiber reinforced aluminum matrix composite is lower than that of aluminum alloy, but its modulus is 2~4 times higher than that of aluminum alloy. At 250°C, its tensile strength can still maintain 81% of the tensile strength at room temperature, and its fatigue strength is 38% higher than that of aluminum alloy. %. The manufactured components have light weight, good rigidity, small wall t...

Claims

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Application Information

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IPC IPC(8): B23K26/32B23K26/42B23K35/34B23K103/18B23K26/70
Inventor 李卓然张相龙冯广杰刘羽利肇鹤刘政平
Owner HARBIN INST OF TECH
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