Machining method for improving strength of hot stamping part

A technology of stamping parts and processing methods, which is applied in the field of processing to improve the strength of hot stamping parts, can solve the problems of hot stamping parts becoming stronger, and achieve the effect of slowing down thermal fatigue damage, good comprehensive performance, excellent strength and reliable safety performance

Inactive Publication Date: 2017-12-12
肥西县通力机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional hot stamping process can only produce ultra-high-strength steel parts with martensitic structure, which cannot meet the requirements of different mechanical properties in different parts; Safety structural parts, on the one hand, need sufficient strength to ensure that they will not be damaged when they are subjected to impact; It is urgent to solve the technical problems of variable strength manufacturing of hot stamping parts in order to achieve the optimal matching of material properties, mechanical properties of parts and safety performance of car body

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A processing method for improving the strength of hot stamping parts, using high-strength steel plates to process the required blanks for stamping parts according to conventional methods, heating up the processed blanks for stamping parts in a heating furnace to 1000°C, and keeping the temperature for 7 minutes to homogenize the structure , and then transferred to a sealable heating kettle with an argon atmosphere, and a low-temperature argon gas with a temperature of 400°C was introduced to cool the blank of the stamping part to 480°C in 28 minutes, and then control the inflow and outflow of the gas to make the sealable heating The pressure in the kettle is kept at 0.6kPa for 3 hours, and then argon gas is introduced to restore the air pressure in the sealable heating kettle to normal pressure, and then high-temperature argon gas is introduced to raise the temperature of the blank of the stamping part to 640 ° C, and then transfer to the hot stamping It is formed in a f...

Embodiment 2

[0015] A processing method for improving the strength of hot stamping parts, using high-strength steel plates to process the required blanks for stamping parts according to conventional methods, heating the processed blanks for stamping parts to 950 ° C in a heating furnace, and keeping the temperature for 8 minutes to homogenize the structure , and then transferred to a sealable heating kettle with an argon atmosphere, and the temperature is low-temperature argon, so that the blank of the stamping part is cooled to 450°C in 25 minutes, and then the inflow and outflow of the gas are controlled to make the air pressure in the sealable heating kettle Keep it at 0.8kPa for 2 hours, then pass in argon gas to restore the air pressure in the sealable heating vessel to normal pressure, and then pass in high-temperature argon gas to raise the temperature of the stamping part blank to 660 °C, and then transfer it to the hot stamping forming mold Forming and quenching.

[0016] After te...

Embodiment 3

[0018] A processing method for improving the strength of hot stamping parts, using high-strength steel plates to process the required blanks for stamping parts according to conventional methods, heating the processed blanks for stamping parts in a heating furnace to 1050°C, and keeping the temperature for 6 minutes to homogenize the structure , and then transferred to the sealable heating kettle with argon atmosphere, and the temperature is low-temperature argon, so that the blank of the stamping part is cooled to 500 °C in 30 minutes, and then the inflow and outflow of the gas are controlled to make the air pressure in the sealable heating kettle Keep it at 0.5kPa for 4 hours, then pass in argon gas to restore the air pressure in the sealable heating vessel to normal pressure, and then pass in high-temperature argon gas to raise the temperature of the stamping part blank to 620 °C, and then transfer it to the hot stamping forming mold Forming and quenching.

[0019] After tes...

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Abstract

The invention belongs to the technical field of hot stamping forming, and particularly relates to a machining method for improving strength of a hot stamping part. The machining method comprises the following steps: a high-strength steel plate is machined into a blank of a required stamped part according to a conventional method; the machined stamped part blank is heated to 950-1050 deg C in a heating furnace, and heat preservation is carried out for 6-8 minutes so that structures can be homogenized; and then the heated blank is transferred into an argon atmosphere sealable heating kettle for treatment. Compared with the prior art, the machining method has the advantages that the stamped part blank subjected to the heat treatment is subjected to slow cooling treatment in a closed environment, after the cooled part blank is kept for a period of time under a low-pressure condition, the blank is subjected to the heating treatment so that the surface of a workpiece can have the specific structures, then the workpiece further has excellent strength and reliable safety performance, the thermal fatigue damage of a mold can be effectively relieved, shot blasting treatment is not needed after the workpiece is formed, the machining performance and the welding performance of the part is guaranteed, the comprehensive performance is good, and the machining method is suitable for hot stamping forming of automobile parts.

Description

technical field [0001] The invention belongs to the technical field of hot stamping forming, and in particular relates to a processing method for improving the strength of hot stamping parts. Background technique [0002] With the increasing energy crisis and environmental problems and people's increasing attention to automobile safety, safety, energy saving and environmental protection have become the development trend of today's automobile industry. Hot stamping technology can effectively solve the problem of poor stamping performance and springback of high-strength steel plates It is an effective way to achieve energy saving and emission reduction and automobile lightweight; hot stamping technology is to heat the steel plate to the austenite state, pressurize and quench after rapid stamping to obtain ultra-high-strength steel with martensitic structure The forming method of the parts, after hot stamping, the strength of the obtained parts can reach more than 1500MPa. The ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C21D1/84C21D9/00C21D1/74
CPCC21D1/84C21D1/74C21D9/00
Inventor徐群张飞李少宝张维林董万斌
Owner肥西县通力机械有限公司