Extrusion device and method for connecting magnesium alloy with aluminum alloy
An extrusion device, aluminum alloy technology, applied in the connection of aluminum alloys and magnesium alloys, can solve the problems of too large difference in the diffusion speed of elements, reduced bonding performance at the interface, and difficulty in stable temperature control, so as to improve the connection quality and improve the The effect of its own strength and fast forming speed
Active Publication Date: 2017-02-15
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology
Because the traditional welding method is difficult to control the temperature stably, it is easy to cause the grains in the heat-affected zone of aluminum and magnesium alloy welding to be coarse.
The emerging welding method has gradually replaced the traditional welding method with the characteristics of fast speed, narrow welding heat-affected zone and no
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[0056] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.
[0057] Such as figure 2 As shown, an extrusion device for connecting magnesium alloy and aluminum alloy includes a mould, the mold includes a die 15 and a punch 13, the punch 13 is rod-shaped, the die 15 is provided with an extrusion chamber 2, and the die 15 An electric heating element such as an electric heating element 1 is arranged outside the extrusion chamber 2, the length of the punch 13 is longer than the depth of the extrusion chamber 2, and the extrusion chamber 2 communicates with the molding chamber 3 of the set shape, such as image 3 As shown, the volume of the molding chamber 3 is smaller than that of the extrusion chamber 2, the molding chamber 3 communicates with the outside world or communicates with the outside world through the guide sleeve 4, and the punch ...
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The invention discloses an extrusion device and method for connecting a magnesium alloy with an aluminum alloy. The device comprises a male die and a female die with an extrusion cavity. The magnesium alloy, an amorphous alloy and the aluminum alloy are arranged in the extrusion cavity. The male die extrudes the magnesium alloy, the amorphous alloy and the aluminum alloy in the extrusion cavity under the effect of external force, the magnesium alloy, the amorphous alloy and the aluminum alloy are arranged in the female die and enter a forming cavity under the extrusion effect of the male die after being heated so as to be formed, common thermal deformation is conducted in the state of a high temperature and three-way pressure stress, and stable connection is achieved. According to the extrusion device and method, the amorphous alloy is used as an intermediate transition layer, direct contact between the aluminum alloy and the magnesium alloy is avoided, direct element diffusion between the aluminum alloy and the magnesium alloy is avoided, it is avoided that Al-Mg intermetallic brittle compounds and welding gaps are formed, the connection quality is improved, the magnesium alloy, the amorphous alloy and the aluminum alloy are all in the low-stress super-plasticity state by means of the combination of the optimal extrusion temperature and the optimal extrusion speed, and formation of a connector is promoted.
Description
technical field [0001] The invention relates to the connection of magnesium alloy and aluminum alloy, in particular to an extrusion device and method for connecting magnesium alloy and aluminum alloy. Background technique [0002] One of the most urgent problems in modern machine manufacturing is to reduce metal consumption while improving the technical performance and reliability of structures and equipment. Aluminum alloy has developed rapidly due to its low density, high strength, corrosion resistance, high thermal conductivity and electrical conductivity, and good processing performance. It has been widely used in various fields of national economy and national defense construction, and its consumption is second only to steel materials. Become the second largest metal material. Magnesium alloys have many advantages such as low density, high specific strength and specific stiffness, good dimensional stability, superior thermal conductivity, good cutting performance, easy...
Claims
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Login to view more IPC IPC(8): B21C23/22B21C25/02B21C29/00B21C31/00
CPCB21C23/002B21C23/22B21C25/02B21C29/003B21C31/00
Inventor 李辉平蒋芮刘海娟侯弘历贺连芳张春芝
Owner SHANDONG UNIV OF SCI & TECH
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