Hot stamping forming method for variable strength distribution strong-strength steel plate part

A technology of hot stamping and high-strength steel, applied in the field of hot-stamping of high-strength steel sheet parts, can solve the problems of effective adjustment of strength, inability to obtain reasonable strength distribution, etc., to achieve smooth strength distribution, ideal overall mechanical properties, and simple mold structure Effect

Inactive Publication Date: 2013-04-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that it is difficult to effectively adjust the strength of different parts and obtain a reasonable strength distr...

Method used

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  • Hot stamping forming method for variable strength distribution strong-strength steel plate part
  • Hot stamping forming method for variable strength distribution strong-strength steel plate part
  • Hot stamping forming method for variable strength distribution strong-strength steel plate part

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specific Embodiment approach 1

[0013] Specific implementation mode one: combine Figure 1 ~ Figure 3 Specifically illustrate the implementation steps of this embodiment:

[0014] Step 1. Put the high-strength steel slab 1 to be formed into the heater 2. The high-strength steel slab 1 is divided into several areas along the length direction. The several areas are respectively the first area A, the second area B and the third area C. The heater 2 The corresponding zone 1 A, zone 2 B and zone 3 C use different or the same heating temperature for zone control, and heater 2 corresponds to zone 1 A, zone 2 B and zone 3 C for zone control using different or the same heating time ;

[0015] Step 2, quickly transfer the heated high-strength steel slab 1 to the forming mold 3 within 3 to 5 seconds, quickly close the forming mold 3 and complete the forming of the high-strength steel slab 1 within 1 to 3 seconds;

[0016] Step 3, keeping the forming mold 3 closed, passing cooling water into the cooling hole 4 on the ...

specific Embodiment approach 2

[0019] Specific implementation mode two: combination figure 1 To illustrate this embodiment, the first zone A, the second zone B and the third zone C corresponding to the heater 2 in step one of this embodiment adopt different heating temperatures and the same heating time for zone control, and the high-strength steel slab in step one 1 The heating temperature for areas with high strength requirements is 850°C to 1000°C, the heating temperature for areas with low strength requirements is 700°C to 850°C, and the heating time for areas with high strength requirements and areas with low strength requirements is 3 minutes to 6 minutes. The division of areas with high strength requirements and areas with low strength requirements is based on the needs of parts. In this embodiment, different austenitization degrees are obtained by controlling the heating temperature of different regions on the high-strength steel slab 1 . During implementation, the above-mentioned purpose can be ac...

specific Embodiment approach 3

[0020] Specific implementation mode three: combination figure 1 To illustrate this embodiment, the heating temperature of the high-strength steel slab 1 in step 1 of this embodiment is 900°C for the region with high strength requirement, 750°C for the region with low strength requirement, and the region with high strength requirement and the region with low strength requirement The heating time is 5min. In this embodiment, different austenitization degrees are obtained by controlling the heating temperature of different regions on the high-strength steel slab 1 . During implementation, the above-mentioned purpose can be achieved only by performing zone temperature control on the heater 2, and the method is simple and feasible. Other steps are the same as in the second embodiment.

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Abstract

The invention discloses a hot stamping forming method for a variable strength distribution strong-strength steel plate part, relates to a hot-stamping forming method for a strong-strength steel plate part, and aims to solve the problems of difficulty in the effective adjustment of strength of different parts and incapability of obtaining rational strength distribution in a hot stamping forming process of a strong-strength steel plate. The method comprises the following steps of: 1, placing a strong-strength steel plate blank to be formed into a heater, and performing zonal control on first, second and third zones of the heater by correspondingly adopting different or the same heating temperature and different or the same heating time; 2, quickly transferring the heated strong-strength steel plate blank into a forming die within 3 to 5 seconds, quickly closing the forming die, and forming the strong-strength steel plate blank within 1 to 3 seconds; 3, keeping the forming die closed, and introducing cooling water into cooling holes in the forming die to reduce the temperature of the forming die to quench the strong-strength steel plate part; and 4, after the quenching is completed, opening the forming die, and taking out the obtained strong-strength steel plate part. The method is used for the hot forming of the strong-strength steel plate.

Description

technical field [0001] The invention relates to a hot stamping forming method of a high-strength steel plate part, in particular to a hot stamping forming method of a high-strength steel plate part with variable strength distribution. Background technique [0002] High-strength steel has been widely used as a lightweight material in many fields, especially in automobile manufacturing. High-strength steel is divided into two categories. One is that the material itself has high strength, and subsequent strengthening is not required or possible after being formed into parts, such as dual-phase (DP) steel, phase transformation induced plasticity (TRIP) steel, horse Tensitic (M) steel, complex phase (CP) steel, etc.; the other is that the strength of the material itself is not high, and high strength can be obtained through quenching and other processes after being formed into parts, such as hot forming (HF) steel. Hot forming steel is a boron-containing steel that can be quench...

Claims

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Application Information

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IPC IPC(8): B21D22/00B21D37/16
CPCB30B15/064
Inventor 何祝斌王志彪彭博苑世剑
Owner HARBIN INST OF TECH
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