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Integrated stamping forming treatment method of steel

A technology of stamping forming and processing method, applied in the field of integrated processing of steel stamping and forming, can solve the problems of loss of cold forming, inability to adapt to large-scale production, inability to maintain the dimensional accuracy of stamping parts, etc., and achieve the effect of saving energy consumption

Active Publication Date: 2010-08-18
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the disadvantage of the above-mentioned prior art is that it cannot adapt to large-scale production using steel plates as raw materials with cold stamping.
Because if it is first processed by Q-P-T and then cold stamped, the life of the cutting die and cold forming die (such as drawing die, cold stamping die, etc.) will be very short due to the high strength of the plate. Fire treatment, the dimensional accuracy of stamping parts cannot be maintained due to heat treatment distortion, and the advantages of cold forming are lost
Cannot meet the requirements of mass production such as body building

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: the manufacture of ultra-high strength helmet

[0023] The cold-rolled steel plate of medium carbon steel containing silicon and niobium with a thickness of 1 mm is used as the material. When the cold-rolled plate is supplied, it is blanked by a friction press, punched into a helmet slab, and heated by a mesh belt furnace. Heating the slab, the slab is placed flat on the mesh belt at the feed end of the mesh belt furnace, and is transported by the mesh belt into the furnace for heating. The furnace temperature is controlled at 840°C to complete the austenitization of the steel billet, and nitrogen and methanol atmosphere are introduced into the furnace For protection, after the steel billet comes out of the furnace, it is quickly transferred to the hot stamping forming machine by the manipulator for stamping and forming. The hot stamping forming machine has three stations. The first station is stretching, the second station is forming, and the third statio...

Embodiment 2

[0024] Embodiment 2: car door

[0025] Using medium-carbon cold-rolled steel sheets containing silicon and niobium as raw materials, the thickness of the sheet is 1.2mm, and the car door is made through the following procedures.

[0026] Process 1. Blanking and punching: Blanking and punching are carried out with a press in a cold state, and punched into a slab of the car door.

[0027] Process 2. Austenitizing heating: heat the door slab to the austenitizing temperature of 840°C with a roller-type heating furnace, and pass a nitrogen-methanol protective atmosphere into the furnace to prevent oxidation and decarburization of the slab surface.

[0028] Process 3. Hot stamping forming: Immediately after the slab is heated and released from the roller heating furnace, it is sent to the stamping machine by a robot to be stamped and formed in the austenitic state, and the shape of the car door is stamped.

[0029] Process 4. Intercooling quenching-distribution: After hot stamping,...

Embodiment 3

[0032] Example 3: Beam

[0033] The length of the beam is 4250mm and the width is 250mm. The width of the opposite side of the two sides is 120mm. There is a hole of Ф120mm at each end. The raw material of the beam is a medium-carbon silicon-containing and niobium-containing steel plate with a thickness of 5mm. The manufacturing process of the beam is as follows:

[0034] Process 1. Blanking and punching: In the cold state, use a knife-edge die or a blanking die to punch a beam slab and use laser cutting to process the round holes at both ends.

[0035] Process 2. Austenitization: the beam slab is heated in a through-type heating furnace, and the stepping or chain plate driving mechanism runs through the entire furnace and extends from both ends to the outside of the feeding furnace door and the discharging furnace door, and the steel billet Put it flat on the driving mechanism, enter the furnace from the feed port, and pass through the furnace driven by the driving mechanism...

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PUM

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Abstract

The invention relates to an integrated stamping forming treatment method of steel in the metal hot processing field. The method comprises the following steps of: selecting and preparing steel billets; hot stamping; controlling the quenching cooling at suspension cooling temperature; carrying out secondary heating treatment on the cooled steel billets, and then cooling to tempering temperature; and fine stamping and forming while the billets are hot. In the invention, hot stamping forming and heat treatment austenite heating are combined into a whole, thus the energy is saved, and the toughness and the precise plasticity forming of the steel are enhanced. The tensile strength of the treated steel is larger than 1,900MPa.

Description

technical field [0001] The invention relates to a method in the technical field of metal thermal processing, in particular to an integrated processing method for stamping and forming of steel materials. Background technique [0002] In order to meet the needs of light weight and high reliability of modern manufacturing products, a series of high-strength steel plates have been developed. At present, the high-strength steel plates that have been used in the manufacture of high-end car bodies have a maximum strength of about 1400Mpa. [0003] After searching, it is found that Chinese Patent Document No. CN101121955, published on February 13, 2008, records a "heat treatment method for improving the mechanical properties of quenched steel parts by carbon distribution and tempering"; .2) records "Quenching-carbon distribution-tempering (precipitation) (Q-P-T) process for ultra-high strength steel", which reports the adoption of a new technology of quenching-distribution-tempering...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/02
CPCC21D1/22C21D9/0068C21D8/0205
Inventor 金学军崔振山顾剑锋韩利战
Owner SHANGHAI JIAOTONG UNIV
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