Forming method for achieving different-area performance stable transition of high-strength steel hot-forming part

A technology of hot forming and high-strength steel, which is applied in the field of hot stamping forming, can solve the problems such as the reduction of formability, achieve the effects of ensuring formability, reducing production costs, and easy industrialization

Active Publication Date: 2015-04-01
东莞市豪斯特热冲压技术有限公司 +1
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  • Abstract
  • Description
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Problems solved by technology

This method needs to change the original design principle of the blank, and needs to deliberately change the shape of the blank, resulting in reduced formability

Method used

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  • Forming method for achieving different-area performance stable transition of high-strength steel hot-forming part
  • Forming method for achieving different-area performance stable transition of high-strength steel hot-forming part
  • Forming method for achieving different-area performance stable transition of high-strength steel hot-forming part

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Embodiment Construction

[0023] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

[0024] In Embodiment 1, as attached figure 1 Shown is a forming method for the smooth transition of properties in different regions of high-strength steel hot-formed parts. In this embodiment, boron-containing hot-stamped steel is used, and the plate thickness is 0.5-3.0mm uniform plate, and the delivery state is annealed. The chemical composition is shown in Table 1.

[0025] Table 1 Chemical composition of boron-containing steel (wt, %)

[0026]

[0027] Specifically include the following steps:

[0028] Step A, determining the positions of the impact energy-absorbing areas (5, 9) and the position of the high-strength area 7 of the formed sheet 1 according to the strength requirement...

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Abstract

The invention relates to the technical field of hot stamping forming, in particular to a forming method for achieving different-area performance stable transition of a high-strength steel hot-forming part. The forming method utilizes induction heating to control electromagnetic fields and vortex fields of different areas, accordingly controls the heating temperatures in different areas of a plate and obtains different strengths after stamping is completed. The heating temperature ranges from 850 DEG C to 1000 DEG C and is kept for 0-10 min, a steel plate is heated to be in a complete austenitizing state, and the strength of the hot-formed steel plate is higher than1500 MPa. The heating temperature ranges from 25 DEG C to 850 DEG C and is kept for 0-10 min, the steel plate is heated to be in an incomplete austenitizing state, and the strength of the hot-formed steel plate ranges from 500 MPa to 900 MPa. The shape of an induction heating coil, the distance between the coil and the plate, current and frequency are designed according to the demand for different area strengths of the part, and the part has best collision performance matched with strength and plasticity after being subjected to hot stamping forming.

Description

technical field [0001] The invention relates to the technical field of hot stamping forming, in particular to a forming method for the smooth transition of properties in different regions of a high-strength steel hot forming part. Background technique [0002] Hot stamping parts are widely used in automotive safety structural parts due to their high strength (above 1500MPa); however, the strength is too high and the elongation is low, which greatly reduces the crash performance of the formed parts. In order to improve the crash performance of thermoformed parts under the premise of ensuring strength, it is necessary to increase the elongation of specific parts. Existing methods for increasing the elongation of a specific part of a thermoformed part have significant limitations. For example, some methods, the Chinese patent application numbers are: CN201110412533.7, CN201120393429.3, CN201110126218.8 The technology described in the patent is to obtain different strengths by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/02B21D37/16
CPCB21D22/02B21D37/16B21D53/88
Inventor 张宜生刘培星姚小春
Owner 东莞市豪斯特热冲压技术有限公司
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