A method for preparing variable-strength thermoformed parts for automobiles

A technology of thermoforming and variable strength, which is applied in vehicle parts, transportation and packaging, etc. It can solve problems such as poor impact energy absorption effect, unfavorable parts comprehensive performance, improvement, etc., and achieve stable performance, good performance consistency and process stability Good results

Active Publication Date: 2020-12-22
MAANSHAN IRON & STEEL CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the deficiencies of the prior art, the present invention provides a method for preparing variable-strength thermoformed parts for automobiles, which solves the problem that although full-martensitic parts have ultra-high strength, their collision energy absorption effect is relatively poor, and the Conducive to the improvement of the comprehensive performance of parts

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037] A method for preparing a variable-strength thermoformed part for an automobile, comprising the steps of:

[0038]S1. Choose steel for hot forming as the hard zone material. The thickness of the material is between 0.7mm and 2.0mm. The structure of different hard zone materials is different. The specific conditions are as follows:

[0039] The chemical composition of 1500MPa grade hard zone material is: C: 0.20-0.25%, Si: ≤0.5%, Mn: 0.5-1.5%, P: ≤0.020%, S: ≤0.010%, Cr: ≤0.50%, Al: 0.01 -0.06%, B: 0.002~0.005%, Ti+Nb+V: 0.05-0.1%, Mo: ≤0.5%, the rest is Fe and unavoidable impurities;

[0040] The chemical composition of 1800MPa grade hard zone material is: C: 0.29-0....

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a manufacturing method for an automobile variable-strength thermally formed part. The manufacturing method comprises the following steps: S1, selecting steel for thermal forming as a hard region material; and S2, selecting a soft region material and controlling the thickness of the soft region material to be 0.7mm-2.0mm, wherein chemical components of the soft region material are as follows: less than or equal to 0.10% of C, less than or equal to 0.1% of Si, 0.5-1.0% of Mn, and less than or equal to 0.020% of P. According to the manufacturing method for the automobile variable-strength thermally formed part disclosed by the invention, the existing hot stamping equipment does not need to improve or additionally arrange, and a thermal forming mould does not need to re-design, so that mould development cost is reduced, the service life of the mould is prolonged, process stability of production is good, the soft region material cost is low, production is easy, performance stability after welding is good, and welding seam quality is high; a transition region position, width and part soft hard region performance are relatively good in consistency; and parts with different strength grades can be obtained by selecting different hard region materials (1500MPa or 1800MPa), so that parts obtained by the method are good in moulded surface dimension.

Description

technical field [0001] The invention relates to the technical field of automobile materials, in particular to a preparation method of variable-strength thermoformed parts for automobiles. Background technique [0002] Automobile lightweight technology is one of the key technologies to adapt to the trend of modern automobile safety, energy saving and environmental protection. At present, more and more automobile body parts use thermoforming technology (such as: automobile bumpers, anti-collision beams, A-pillars, B-pillars , door bumper, etc.). Thermoforming technology is a new process that divides forming and strengthening into two steps to produce ultra-high-strength auto parts. The produced parts have the advantages of ultra-high strength, high forming precision, and no springback. [0003] At present, the hot stamping forming parts widely used in the market mainly heat the steel plate to complete austenitization for 3-10 minutes, and then stamp and form it at one time. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): B23P15/00
CPCB23P15/00B23P2700/14B23P2700/50
Inventor刘永刚詹华晋家春崔磊谷海容肖洋洋冷德平马二清董标
OwnerMAANSHAN IRON & STEEL CO LTD