Semi-solid composite connecting forming process for preparing compound structures parts

A semi-solid forming and composite structure technology, applied in the field of advanced connection, can solve the problems of long processing route and high production cost, and achieve the effect of reducing energy consumption, improving product quality and expanding application fields

Inactive Publication Date: 2007-11-28
UNIV OF SCI & TECH BEIJING
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  • Claims
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Problems solved by technology

This process overcomes the problems of long processing routes and high prod

Method used

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  • Semi-solid composite connecting forming process for preparing compound structures parts

Examples

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Example Embodiment

[0026] Example 1: A semi-solid thixoforging extrusion method is used to prepare a composite structural part of A356 aluminum alloy and steel bolt connection.

[0027] Purchased from Duralcan company (Duralcan company) the diameter of 76mm A356 aluminum alloy bar with semi-solid structure characteristics. After the distance cutting process, first use an induction heating furnace to quickly and uniformly heat the blank to a semi-solid temperature: 580°C. Design a mold for semi-solid thixoforging and extrusion of A356 aluminum alloy parent parts, and at the same time process the position of the steel connecting bolt in the cavity of the mold. Process the functional parts for connection---steel connection bolts, and place them in the mold before semi-solid forming. The heated semi-solid billet was quickly put into the concave mold of the forming mold with a jig (the mold preheating temperature was set to 200°C). The molding speed of the press was adjusted to 100 mm / s, a graphite relea...

Example Embodiment

[0028] Embodiment 2: A semi-solid thixoforging extrusion method is used to prepare a composite structural part of MMC material (SiC particle reinforced A356 aluminum alloy) and steel bolts.

[0029] The MMC material (SiC particle reinforced A356 aluminum alloy composite material) with a diameter of 76mm with semi-solid structure characteristics was purchased from Duralcan company (Duralcan company). After the distance cutting process, first use an induction heating furnace to quickly and uniformly heat the billet to a semi-solid temperature: 578°C. Design a mold for semi-solid thixoforging and extrusion of MMC material matrix parts, and at the same time process the position of the steel connecting bolt in the cavity of the mold. Process the functional parts for connection---steel connection bolts, and place them in the mold before semi-solid forming. The heated semi-solid billet was quickly put into the concave mold of the forming mold with a jig (the mold preheating temperature w...

Example Embodiment

[0030] Example 3: A semi-solid thixoforging extrusion method is used to prepare composite structural parts of AZ91 magnesium alloy and steel pipes.

[0031] Purchased from Duralcan company (Duralcan company) diameter 76mm AZ91 magnesium alloy bar with semi-solid structure characteristics. After the distance cutting process, first use an induction heating furnace to quickly and uniformly heat the billet to a semi-solid temperature: 583°C, and use argon as a protective gas during the heating process. Design a mold for semi-solid thixoforging and extrusion of AZ91 magnesium alloy parent parts, and at the same time process the position of the connecting steel pipe in the cavity of the mold. Process the functional parts for connection-steel pipes, and place them in the mold before semi-solid forming. The heated semi-solid billet was quickly put into the concave mold of the forming mold with a jig (the mold preheating temperature was set to 200°C). The molding speed of the press was adj...

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Abstract

The semi-solid compounding formation process for producing composite structure part as one advanced technological process includes the following steps: drying the alloy block for the part matrix at 80-120 deg.c, heating in a resistance furnace to smelt, standing for 20-30 after smelting completely, stirring the alloy liquid to obtain semi-solid slurry with homogeneous composition and high performance, forming semi-solid mold, and semi-solid forming at the speed of 70-120 mm/s and the temperature determined on the alloy in mold preheated to 200-300 deg.c, with the forming pressure of 400-600 KN being applied for 5-15 sec. The present invention has the advantages of short production process, formed product with shape near the end product, low power consumption and high product quality.

Description

technical field [0001] The invention belongs to the field of advanced connection technology, and in particular provides a semi-solid composite connection forming process for preparing composite structural parts Background technique [0002] With the progress of modern science and technology, the requirements for material science and engineering technology are increasing day by day. The research and development of new high-performance structural parts and their advanced connection technology has become an urgent problem for high-tech enterprises. Communication and other fields are more obvious. At present, welding methods and mechanical connections (such as screws and nuts) are mainly used to realize structural parts made of composite connections of different materials. Because this method has some defects such as long production cycle, poor connection effect (such as the existence of intermediate hard and brittle phases or large connection gaps), and high production cost, t...

Claims

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Application Information

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IPC IPC(8): B22D18/02B21C23/22
Inventor 王开坤
Owner UNIV OF SCI & TECH BEIJING
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