A hot stamping and quenching integrated treatment method based on hydroforming device

A technology of hydroforming and processing method, which is applied in the field of metal thermal processing, and can solve problems such as lack of martensitic structure, failure of high-strength steel to reach critical cooling rate, uneven strength of final formed parts, etc., to improve quality, The effect of solving the problem of uneven strength

Active Publication Date: 2021-06-11
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Claims
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AI Technical Summary

Problems solved by technology

The use of this solid contact quenching method may cause some high-strength steels to fail to reach the critical cooling rate, so that a complete martensitic structure cannot be obtained after quenching, resulting in defects such as uneven strength in the final formed part.

Method used

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  • A hot stamping and quenching integrated treatment method based on hydroforming device
  • A hot stamping and quenching integrated treatment method based on hydroforming device

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Embodiment Construction

[0022] The invention provides a hot stamping and quenching integrated processing method based on a hydroforming device. The specific steps of the method are as follows:

[0023] (1) The billet is placed in a heating furnace, and the billet is austenitized at a holding temperature of 950° C. after a holding time of 5 minutes.

[0024] (2) The blank obtained in step (1) is quickly moved to the mold of the hydroforming device within 5s, and the amount of liquid in the liquid pool of the mold ensures that the blank does not touch the blank after the mold is pressed together; The temperature was measured with an infrared thermometer.

[0025] (3) The mold is closed quickly, and at the same time, the hydraulic press connected to the liquid pool is started, and the piston moves down, so that the liquid in the liquid pool contacts the blank, and the liquid in the liquid pool fills the liquid pool and forms a certain pressure, The blank is quenched and shaped; the temperature of the b...

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Abstract

The invention discloses an integrated treatment method of hot stamping and quenching based on a hydroforming device, which belongs to the technical field of hot stamping. The method of the invention includes the following steps: placing a blank in a heating furnace to keep it warm to make the blank austenitized; and then austenitizing the blank The billet moves quickly to the mold, and the liquid level in the liquid pool of the hydraulic mold maintains a certain height and ensures that it does not touch the formed part after the mold is pressed; the mold is closed quickly, and at the same time, the hydraulic machine connected to the liquid pool is started, and the piston moves down to make the liquid in the pool The liquid contacts the high-temperature formed part and quickly forms and maintains a certain pressure for quenching; after quenching, the pressure is maintained for a period of time, the piston moves up, the mold opens, and finally the formed part is obtained. The invention can realize the quenching of high-temperature formed parts in the mold, so that the formed parts can obtain complete martensitic structure, ensure the high strength of the formed parts and improve the dimensional accuracy of the formed parts.

Description

Technical field: [0001] The invention belongs to the technical field of metal thermal processing, and relates to a quenching-controlled hot stamping method, in particular to an integrated treatment method of hot stamping and quenching based on a hydroforming device. The method uses a hydroforming device to realize the integration of hot stamping and quenching, which ensures the uniformity of strength of the final formed part. [0002] technical background: [0003] In recent years, the use of advanced high-strength steel plates to form body parts can significantly improve the safety performance of passenger cars, reduce the weight of the body, and reduce fuel consumption. For traditional cold stamping, for high-strength steel forming, body parts are not only easy to break during the forming process, but also prone to springback, which affects subsequent body assembly. For high-strength steel with a strength exceeding 1000MPa, the traditional cold stamping process is often in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/02C21D1/18
CPCB21D22/02B21D22/022C21D1/18
Inventor 王会廷吴琦孔建非陈其伟沈晓辉曹杰潘红波
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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