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Thermal forming method for multilayer metal composite boards

A composite sheet and multi-layer metal technology, applied in metal processing equipment, forming tools, manufacturing tools, etc., can solve problems such as reducing the peak impact force of the structure, and achieve the effect of increasing strength, high precision of parts, and eliminating the effect of rebound.

Inactive Publication Date: 2012-05-02
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing hot-formed steel plates have basically the same hardness and strength properties along the thickness direction, which is not conducive to reducing the peak impact force of the structure

Method used

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  • Thermal forming method for multilayer metal composite boards
  • Thermal forming method for multilayer metal composite boards
  • Thermal forming method for multilayer metal composite boards

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings. Such as Figure 1-2 Shown, a kind of thermoforming method of multi-layer metal composite plate, comprises the following steps:

[0021] A. Install the cooling pipeline 3: Install the cooling pipeline 3 in the upper mold 1 and the lower mold 2 of the mould, respectively;

[0022] B. Hot stamping forming: heat the boron alloy steel plate 4 to austenitize it, then send the red hot plate 4 into a mold with a cooling pipeline 3, and put the mold into a controlled atmosphere protection heating furnace Perform hot stamping; the temperature in the heating furnace is controlled between 750 and 800 °C;

[0023] C. Rapid and uniform cooling: uniform cooling and forming at a cooling rate greater than 50°C / s.

[0024] image 3 Is to manufacture the material performance test curve of plate 4 according to the method of the present invention, from image 3 It can be seen that the har...

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Abstract

The invention discloses a thermal forming method for multilayer metal composite boards, comprising the steps of: installing cooling pipelines respectively on an upper mould and a lower mould of a mould; heating a boron alloy steel board for austenite, then sending the red hot board to the mould with the cooling pipeline and placing the mould to a controlled atmosphere protecting heating furnace for hot stamping; controlling the temperature of the heating furnace at 750-800 DEG C; and uniformly cooling and forming at a cooling speed greater than 50 DEG C / s. The hardness test of the sample shows that the hardness of the board prepared by the method increases from the surface to the inside and HRC hardness increases from about 20 to about 50, thus, in the thermal forming process, the test piece is formed and quenched uniformly and controllably. Same distribution trends of strength and hardness of the test piece mean that the metal composite material manufactured by the invention has continuous gradient distribution with low surface hardness and strength and high inner hardness and strength.

Description

technical field [0001] The invention relates to a forming method of a metal composite plate, in particular to a thermoforming method of a multilayer metal composite plate. Background technique [0002] The study of automobile lightweight is a mainstream in the design and manufacture of modern automobiles. The application of high-strength materials is a common way for car body lightweight technology. In recent years, the high-strength steel plate hot forming (also known as hot stamping) technology originated in Europe has attracted the attention of the industry. The technical advantages of the thermoforming process are: it can form parts with a strength of up to 1500MPa, which can be assembled and welded into a high-strength driving unit, which can withstand a static pressure of more than 6t without damage; by reducing the wall thickness or cross-sectional size, the weight can be reduced (up to 18% to 35%) to achieve lightweight and save material consumption. [0003] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/02B21D37/16
Inventor 马宁胡平郭威
Owner DALIAN UNIV OF TECH
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