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Method for connecting carbon fiber-reinforced aluminum-based composite material and metal

A technology for strengthening aluminum-based and composite materials, applied in metal processing equipment, welding equipment, non-electric welding equipment, etc., can solve the problems of high heating temperature and deterioration of base metal performance, and achieve low ignition temperature, good metallurgical bonding, and connection quality Good results

Inactive Publication Date: 2013-11-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention solves the problem that the overall heating temperature of the traditional welding method is high, leading to serious interfacial reaction between the reinforced phase carbon fiber and aluminum, and deteriorating the performance of the base material; and provides a method for connecting carbon fiber reinforced aluminum matrix composite material and metal

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  • Method for connecting carbon fiber-reinforced aluminum-based composite material and metal

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specific Embodiment approach 1

[0014] Embodiment 1: In this embodiment, the method of connecting carbon fiber reinforced aluminum matrix composite material and metal is carried out according to the following steps:

[0015] Step 1, 31 to 35 parts of titanium powder with a mesh size ≥ 325 mesh, 41 to 45 parts of aluminum powder with a mesh size ≥ 325 mesh, 2 to 4 parts of nano-carbon powder, and 10 to 12 parts of tin with a mesh size ≥ 325 mesh in parts by weight powder and 9 to 11 parts of copper powder with a mesh size ≥ 325 mesh, put them in a ball mill tank, put balls in a ball-to-material mass ratio of 5:1, protect with argon, and ball mill at a speed of 300 to 500r / min for 2 ~3h to get mixed powder;

[0016] Step 2: Compress the mixed powder obtained in Step 1 into an intermediate layer with a relative density of 60% to 80% and a thickness of 1 to 3mm, and then place it in an airtight container;

[0017] Step 3. Place the intermediate layer obtained in step 2 between the aluminum matrix composite mate...

specific Embodiment approach 2

[0018] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, 32 to 34 parts of titanium powder with mesh ≥ 325 mesh, 42 to 43 parts of aluminum powder with mesh ≥ 325 mesh, 2.5 ~3.5 parts of nano carbon powder, 10.5~11.5 parts of tin powder with a mesh size ≥325 mesh and 9.5~10.5 parts of copper powder with a mesh size ≥325 mesh. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0019] Specific embodiment three: the difference between this embodiment and specific embodiment one is: in step one, 33 parts of titanium powder with a mesh number ≥ 325 mesh, 42.5 parts of aluminum powder with a mesh number ≥ 325 mesh, and 3.0 parts of nano-carbon powder 11 parts of tin powder with a mesh size ≥ 325 mesh and 10 parts of copper powder with a mesh size ≥ 325 mesh. Other steps and parameters are the same as in the first embodiment.

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Abstract

A method for connecting a carbon fiber-reinforced aluminum-based composite material and a metal is disclosed. The invention relates to the method for connecting the carbon fiber-reinforced aluminum-based composite material and the metal. The invention aims to solve the problem that the property of a parent material is worsened because of a serious interface reaction between reinforced phase, carbon fiber, and aluminum caused by high integral heating temperature in the existing welding method. The method comprises the following steps: step 1), mixing titanium powder, aluminum powder, nano-carbon powder, tin powder and copper powder and ball milling the mixture to obtain mixed powder; step 2), pressing the mixed powder to a middle layer; and step 3), putting the middle layer between the aluminum-based composite material and the metal, heating the integer in a vacuum furnace, exerting pressure, stop heating when the temperature is 500 DEG C, and cooling the product to room temperature along the furnace. As the ignition temperature of the powdery middle layer prepared by the invention is low, the performance of the parent material is not worsened when the integral powdery middle layer is heated at a temperature near an ignition temperature point, so that all kinds of excellent properties of the parent material are well maintained. By utilizing the method of the invention, the middle layer can be metallurgically bonded with the parent material at two sides well and the joint strength can be 45.7MPa.

Description

technical field [0001] The present invention relates to a method of joining carbon fiber reinforced aluminum matrix composites 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 to 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/02B23K20/14
Inventor 李卓然张相龙冯广杰刘羽冯吉才
Owner HARBIN INST OF TECH
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