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Method for connecting aluminum matrix composite with titanium alloy

A technology of aluminum-based composite materials and titanium alloys, which is applied in welding equipment, metal processing equipment, non-electric welding equipment, etc., can solve the problems of loss of high-temperature service performance, low performance, and high temperature, and achieve stable performance, uniform joint structure, and joint good quality effect

Inactive Publication Date: 2014-06-18
HARBIN INST OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problems of high temperature in the existing connection method, complete loss of the advantages of high-temperature use performance, no liquid phase between the powders, weak reaction, and a large amount of unreacted particles remaining in the joint, resulting in low performance. To provide a method for connecting aluminum matrix composites and titanium alloys

Method used

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  • Method for connecting aluminum matrix composite with titanium alloy

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specific Embodiment approach 1

[0011] Specific implementation mode 1: In this implementation mode, a method for connecting aluminum-based composite materials and titanium alloys is specifically completed according to the following steps:

[0012] 1. Preparation of mixed powder: Weigh 28 to 32 parts of aluminum powder, 48 to 52 parts of titanium powder, 8 to 12 parts of copper powder, 3 to 7 parts of silicon powder and 3 to 7 parts of germanium in parts by weight powder, mix evenly, then put it in the ball mill tank, put the ball into the ball according to the mass ratio of ball to material (5-10): 1, under the condition of argon protection, at the speed of 300r / min-500r / min Ball mill for 2h~3h to get mixed powder;

[0013] 2. Prepare the intermediate layer compact: press the mixed powder obtained in step 1 into an intermediate layer compact with a relative density of 60% to 80% and a thickness of 1mm to 3mm, and seal it for storage;

[0014] 3. Connection: The aluminum-based composite material, the interme...

specific Embodiment approach 2

[0019] Embodiment 2: This embodiment is different from Embodiment 1 in that: the mesh size of the aluminum powder described in step 1 is 325 mesh to 1000 mesh. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0020] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that the mesh size of the titanium powder described in step 1 is 325 mesh to 1000 mesh. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a method for connecting an aluminum matrix composite with a titanium alloy and relates to method for connecting a composite with an alloy. The method is used for solving the problems in the prior art that the advantages of high temperature and high-temperature use performance are completely lost, no liquid phase is generated between powder, the reaction is weaker, meanwhile a lot of unreacted particles remain in a joint, and the performance is lower. The method comprises the following steps: 1, preparing mixed powder; 2, preparing a middle laminated blank; 3, connecting, thereby finishing the connection of the aluminum matrix composite and the titanium alloy. According to the method, a liquid phase is generated and Al-Ti exothermic reaction is induced, so that connection can be realized at a low temperature, powder of a middle layer does not react fully, no residual particle exists, a joint is uniform in tissue and stable in performance and has certain high-temperature performance and good quality. The invention provides the method for connecting the aluminum matrix composite with the titanium alloy.

Description

technical field [0001] The invention relates to a method of joining composite materials and alloys. Background technique [0002] Composite materials are materials with strong vitality that emerged in response to the needs of modern scientific development. According to the different matrix materials, they can be divided into metal matrix composite materials and non-metal matrix composite materials. Aluminum-based composite materials have high specific strength and specific stiffness, good high temperature performance, more fatigue resistance and wear resistance, good damping performance, and low thermal expansion coefficient. It can combine specific mechanical and physical properties to meet the needs of products. Thanks to the effect of the reinforcing phase, the aluminum matrix composite can still maintain a certain rigidity when it is close to the melting point of the matrix, which makes it have a certain high-temperature performance compared with aluminum alloys. Theref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/00B23K20/233
CPCB23K20/023B23K20/2333
Inventor 李卓然冯广杰朱洪羽张健梁广省刘羽
Owner HARBIN INST OF TECH
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