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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process overcomes the problems of long processing routes and high production costs when processing such parts by mechanical connection or welding.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: A semi-solid thixotropic forging-extrusion forming method was used to prepare composite structural parts connected by A356 aluminum alloy and steel bolts.

[0027] From Duralcan company (Duralcan company) purchase diameter is the A356 aluminum alloy rod stock that φ 76mm has semi-solid structure characteristic. After distance cutting, the billet is firstly heated rapidly and uniformly to the semi-solid temperature: 580°C with an induction heating furnace. Design the die for semi-solid thixotropic forging and extrusion forming A356 aluminum alloy parent parts, and process the position for placing steel connecting bolts in the die of the die. Process the functional parts for connection---steel connection bolts, and place them in the mold before semi-solid forming. The heated semi-solid billet is quickly put into the concave mold of the forming mold with a clamp (the mold preheating temperature is set to 200° C.). The forming speed of the press is adjusted to ...

Embodiment 2

[0028] Example 2: A composite structural part connected by MMC material (SiC particle reinforced A356 aluminum alloy) and steel bolts was prepared using a semi-solid thixotropic forging extrusion method.

[0029] The MMC material (SiC particle reinforced A356 aluminum alloy composite material) with a diameter of φ76 mm and semi-solid structure characteristics was purchased from Duralcan company (Duralcan company). After distance cutting, the billet is firstly heated rapidly and evenly to the semi-solid temperature: 578°C with an induction heating furnace. Design the mold for semi-solid thixotropic forging and extrusion forming MMC material matrix parts, and process the position for placing steel connecting bolts in the die 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 is quickly put into the concave mold of the forming mold with a clamp (the mold preheating ...

Embodiment 3

[0030] Example 3: A semi-solid thixotropic forging and extrusion forming method was used to prepare a composite structural part in which an AZ91 magnesium alloy and a steel pipe were connected.

[0031] From Duralcan company (Duralcan company) purchase diameter is the AZ91 magnesium alloy bar stock that φ 76mm has semi-solid structure characteristic. After distance cutting, the billet is firstly heated quickly and uniformly to the semi-solid temperature: 583°C with an induction heating furnace, and argon is used as a protective gas during the heating process. Design the mold for semi-solid thixotropic forging and extrusion forming AZ91 magnesium alloy parent parts, and process the position for connecting steel pipes in the die of the mold. The functional part for connection - steel pipe is processed and placed in the mold before semi-solid forming. The heated semi-solid billet is quickly put into the concave mold of the forming mold with a clamp (the mold preheating temperatu...

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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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