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A high-temperature oxidation-resistant steel for non-coating hot stamping

A technology of hot stamping and high temperature oxidation resistance, applied in the field of iron and steel materials, can solve the problems of increasing production processes and increasing production costs, and achieve saving of protective atmosphere costs, improvement of hardenability, improvement of high temperature non-skinning performance and high temperature resistance The effect of the ability to corrode

Active Publication Date: 2016-10-05
HENAN SUDA ELECTRIC AUTOMOBILE TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

But at the same time, it also increases the production process and increases the production cost.

Method used

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  • A high-temperature oxidation-resistant steel for non-coating hot stamping
  • A high-temperature oxidation-resistant steel for non-coating hot stamping
  • A high-temperature oxidation-resistant steel for non-coating hot stamping

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Embodiment Construction

[0023] Embodiments, the technical solutions of the present invention are described below with specific examples, but the present invention is not limited thereto.

[0024] Table 1 shows the chemical composition of a high-temperature oxidation-resistant non-coated hot stamping steel of the present invention; it is vacuum smelted, cast into billets, and rolled to a thickness of 1.8mm after hot rolling and cold rolling.

[0025] Table 1 Chemical composition of non-coated hot stamping steels resistant to high temperature oxidation (mass percentage, %)

[0026]

[0027] Cut the cold-rolled annealed sheet of Example 1 into a square sheet of 400×400mm, heat it in a heating furnace to 930°C, and hold it for 3 minutes to ensure that it is fully austenitized; then quickly transfer it to the strip within 5-8s Stamping in a flat mold with a cooling system; after stamping and forming, pressurization and quenching are required, the cooling rate is controlled at 40-60°C / s, and the mold te...

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Abstract

A high-temperature oxidation-resistant non-coated hot stamping steel, the chemical composition of which is C0.18-0.28% by weight, Si0.05-0.50%, Mn0.20-0.90%, P≤0.010%, S≤0.005 %, Cr0.20~1.50%, Mo0.01~0.30%, B0.0006~0.0030%, Nb+V+Ti 0.02~0.25%, Al0.010~0.100%, the balance is Fe and other unavoidable impurities The element; its preparation method can only be prepared through the hot stamping forming process after the steelmaking, billet casting, hot rolling, pickling and cold rolling processes; the metallographic structure is full martensite. The steel for hot stamping forming of the present invention has the characteristics of fine grain, anti-oxidation, low critical cooling rate, etc., can be used normally under the condition of no protective atmosphere, and its performance meets the requirements of the oxidation resistance of the hot stamping forming plate and the strength of the hot stamping forming member .

Description

technical field [0001] The invention belongs to the field of iron and steel materials, and more specifically, the invention relates to a steel plate for hot stamping and related processes. Background technique [0002] In recent years, with the deterioration of the environment and the increasing shortage of energy, the consideration of environmental protection, safety and energy conservation has become the main development direction of the automobile manufacturing industry, and among many measures such as reducing fuel consumption and reducing exhaust emissions, reducing vehicle weight is the most effective obvious. In order to ensure safety and at the same time reduce the weight of automobiles to reduce fuel consumption and emissions, the development of high-strength steel for automobiles has become an inevitable trend. However, high-strength steel is difficult to cold form and springback cannot be avoided. Therefore, hot stamping technology has emerged. Stamping can effec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/32C21D8/00
Inventor 马鸣图易红亮宋磊峰王国栋王中学郭怡晖方刚张均萍
Owner HENAN SUDA ELECTRIC AUTOMOBILE TECH
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