Life extension method of hot stamping forming mold for high-strength steel plate and application

A technology of hot stamping and high-strength steel plates, applied in heat treatment furnaces, manufacturing tools, heat treatment equipment, etc., can solve the problems of ignoring the whole chain technology of molds, and achieve the effects of reducing mold costs, increasing mold life, and improving service life

Inactive Publication Date: 2019-01-04
上大鑫仑材料科技(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the actual production process of molds, there is seldom a complete set of integrated technologies for vacuum heat treatment, mold pretreat

Method used

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  • Life extension method of hot stamping forming mold for high-strength steel plate and application
  • Life extension method of hot stamping forming mold for high-strength steel plate and application
  • Life extension method of hot stamping forming mold for high-strength steel plate and application

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Experimental program
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Effect test

Embodiment 1

[0030] In this embodiment, the hot stamping forming die insert of the high-strength steel plate for automobiles made of 4Cr5Mo2V steel is used for testing, and the specific details are as follows:

[0031] Step 1. Vacuum heat treatment: Heat all the mold inserts that have been roughly machined to 1030°C in a vacuum furnace for a certain period of time, then perform high-pressure (8Bar) gas quenching at a cooling rate of ≥0.047°C / s, and wait for the surface of the mold to cool to ≤50°C, cool the core to ≤150°C, and then temper 3 times in a vacuum furnace at 530°C, 545°C and 560°C respectively, and finally adjust the hardness of the mold insert to 53-55HRC for finishing ;

[0032] Step 2. Mold pretreatment: Bake all the inserts of the automobile high-strength steel plate hot stamping forming mold, and then clean the surface after cooling out of the oven to remove the mold holes, mold cavity and surface dust, residual rubber products, pollutants and others Attachments, wipe the ...

Embodiment 2

[0037] In this embodiment, the hot stamping forming die insert of the high-strength steel plate for automobiles made of 4Cr5MoSiV steel is used for testing, and the specific details are as follows:

[0038] Step 1. Vacuum heat treatment: Heat all the mold inserts that have been roughly machined to 1020°C in a vacuum furnace for a certain period of time, then perform high-pressure (6Bar) gas quenching at a cooling rate of ≥0.047°C / s, and wait for the surface of the mold to cool to ≤50°C, cool the core to ≤150°C, and then temper three times in a vacuum furnace at temperatures of 540°C, 540°C and 560°C respectively, and finally adjust the hardness of the mold insert to 52-54HRC for finishing ;

[0039] Step 2. Mold pretreatment: Bake all the inserts of the automobile high-strength steel plate hot stamping forming mold, and then clean the surface after cooling out of the oven to remove the mold holes, mold cavity and surface dust, residual rubber products, pollutants and others A...

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Abstract

The invention discloses a life extension method of a hot stamping forming mold for a high-strength steel plate. The method comprises the steps of vacuum heat treatment, mold pretreatment, ion nitriding and maintenance. The invention further discloses an application of the life extension method to automobile production. Picking resistance, temper softening resistance and fatigue resistance of the hot stamping forming mold for the high-strength steel plate of an automobile are improved effectively, so that the service life of the hot stamping forming mold for the high-strength steel plate of theautomobile is prolonged 2-3 times, the use requirements of the automobile production industry for long service life and high wear resistance of the hot stamping forming mold for the high-strength steel plate are met, mold cost of a mold user is reduced greatly, and the method has extensive market application prospect.

Description

technical field [0001] The invention relates to the technical field of die application, in particular to a method and application for extending the life of a high-strength steel plate hot stamping forming die. Background technique [0002] With the increasing emphasis on energy conservation and environmental protection in the world, the automotive industry has begun to pay attention to the selection of automotive materials. After discovering that lightweight has a great mitigation effect on environmental pollution, the automotive industry is increasingly pursuing higher quality and lightweight materials. Materials, hot stamping materials widely used in the automotive industry can not only meet the requirements of material performance, but also can reduce the thickness or other dimensions of materials to meet the requirements of lightweight. With the rapid development of society and the expansion of the scale of the automotive industry, for The requirements for hot stamping d...

Claims

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Application Information

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IPC IPC(8): C21D1/18C21D1/773C21D9/00C23C8/26C21D1/26C23F17/00
Inventor 吴晓春
Owner 上大鑫仑材料科技(广东)有限公司
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