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Isothermal transformation thermal treatment method for superhigh-intensity steel

A heat treatment method and ultra-high-strength steel technology, applied in the field of metallurgy, can solve problems such as increased energy consumption, increased costs, and complex processes, and achieve the effects of reducing production energy consumption and production costs, saving energy, and improving mechanical properties

Active Publication Date: 2014-04-23
LAIWU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This process is an off-line heat treatment process, but the process is complicated, which brings problems such as increased energy consumption and increased costs

Method used

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  • Isothermal transformation thermal treatment method for superhigh-intensity steel
  • Isothermal transformation thermal treatment method for superhigh-intensity steel

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Embodiment Construction

[0022] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings, however, those of ordinary skill in the art should understand that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present invention to Those skilled in the art, the examples should not be construed as limiting the scope of the present invention.

[0023] figure 1 is a schematic diagram of an isothermal transformation heat treatment device for ultra-high strength steel according to an exemplary embodiment of the present invention. figure 2 is a schematic diagram of an isothermal transformation heat treatment method for ultra-high strength steel according to an exemplary embodiment of the present invention.

[0024] refer to figure 1 and figure 2 , before using the method of the present invention to process the steel, the billet is first heated through the heating furnace 1, t...

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Abstract

The invention discloses an isothermal transformation thermal treatment method for superhigh-intensity steel, which comprises the following steps of: directly quenching rolled steel material, wherein the initial quenching temperature is 850-900DEG C, and the final quenching temperature is 150-250DEG C; preserving the temperature of the quenched steel material for 0.1-0.5min / mm, wherein the mm is the unit of the thickness or the radius of the steel material; heating and tempering the steel material of which the temperature is preserved, wherein the on-line tempering temperature preservation temperature range is 200-350DEG C, the tempering temperature preservation time is 2-6min / mm, and the mm is the unit of the thickness or the radius of the steel material; and after tempering treatment, cooling the steel material to the room temperature.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular, the invention relates to an isothermal transformation heat treatment method for ultra-high-strength steel. Background technique [0002] Heat treatment is a treatment process in which the material is placed in a certain medium for heating, heat preservation, and cooling several times to obtain the desired structure and performance. According to the effect of heat treatment, the common heat treatment processes of steel include annealing, quenching, tempering and other processes. [0003] Quenching is a heat treatment method in which steel is heated above the critical temperature, and after a period of heat preservation, it is quickly placed in a quenching medium and rapidly cooled at a speed greater than the critical cooling speed. During this process, the temperature of the steel suddenly drops to a certain phase transition At the temperature point, some disequilibrium phase transfor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D11/00C21D1/18
Inventor 许荣昌刘成宝朱京军李文钱魏军广冯文义张长宏吴德发
Owner LAIWU IRON & STEEL GRP
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