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Production method for twinning induced plasticity steel of deformed grain/partial re-crystallization structures

A twinning-induced plasticity and recrystallization technology, which is applied in the field of alloy steel processing, can solve the problems of unsatisfactory comprehensive effects, unfavorable energy absorption per unit mass and unfavorable energy absorption efficiency, and achieve improved energy absorption capacity, energy absorption efficiency, and improved plastic effect

Pending Publication Date: 2016-11-23
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously, although the method of grain refinement can improve the strength and load-carrying capacity of twinning-induced plasticity steel, it is obviously unfavorable to the energy absorption and energy absorption efficiency per unit mass, and the comprehensive effect is still not ideal.

Method used

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  • Production method for twinning induced plasticity steel of deformed grain/partial re-crystallization structures
  • Production method for twinning induced plasticity steel of deformed grain/partial re-crystallization structures
  • Production method for twinning induced plasticity steel of deformed grain/partial re-crystallization structures

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Embodiment

[0026] Embodiment: Twin-induced plasticity steel with high energy absorption capacity, high energy absorption efficiency and high bearing capacity, its main chemical composition is (wt.%): Mn: 29.5; Al: 2.75%; Si: 3.10%; C: 0.05 ; The rest is Fe.

[0027] The preparation method is as follows:

[0028] (1) Dosing according to the target ingredients, smelting in a vacuum induction furnace under the protection of argon, and pouring into steel ingots after smelting;

[0029] (2) The amount of turning on the surface of the steel ingot is 2 mm. After being forged at a high temperature of 1000 ° C, it is drawn and cut to obtain a forging billet with a size of 80 × 80 × 600 mm, and the forging ratio is 0.5;

[0030] (3) Upsetting the high-temperature elongated forging billet at 1000°C to a forging billet with a cross-sectional size of 120×120 mm.

[0031] (4) Elongate the upset forging blank at 650°C to a forging blank with a cross-sectional size of 45×45mm;

[0032] (5) Heat the e...

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Abstract

The invention discloses a production method for twinning induced plasticity steel of deformed grain / partial re-crystallization structures. Deformed grains are formed through medium-temperature plastic processing, and then partial isometric crystals grow in the deformed structure through medium-temperature short-time annealing or quenching. External force needed by dislocation glide in the stretching process is increased through high-density dislocation and complicated dislocation configurations in the deformed grains, so that the yield strength of a material is improved, the isometric crystals formed in the re-crystallization process promote twinning deformation, and therefore the high plasticity of the material can be guaranteed. The energy absorption ability, the energy absorption efficiency and the bearing capacity of the material are improved simultaneously through the combined effect of the two structures, the relative proportion of the two structures can be adjusted by changing plastic processing and thermal treating technologies, and therefore different energy absorption characteristics can be obtained. Compared with common twinning induced plasticity steel, the twinning induced plasticity steel produced through the method has the advantages that the energy absorption ability, the energy absorption efficiency and the bearing capacity of the material are high.

Description

technical field [0001] The invention relates to the field of alloy steel processing, and particularly designs a method for preparing deformed grain / partially recrystallized structure twinning-induced plasticity steel. Background technique [0002] High-strength plasticity alloy steel or twin-induced plasticity steel is a single-phase austenitic steel. Due to its moderate stacking fault energy, it can continue to form twins and grow gradually during plastic deformation, resulting in continuous strain hardening effect, which significantly delays deformation localization, thus showing extremely high plasticity and high strength. Plastic product (the product of tensile strength and elongation after fracture) is a new type of alloy material with particularly outstanding cushioning energy absorption (energy absorption capacity and energy absorption efficiency). It is used in aerospace, national defense, anti-terrorism and vehicles, roads, It has a very wide application prospect i...

Claims

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Application Information

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IPC IPC(8): C21D8/06C21D6/00C22C38/04C22C38/06C22C38/02
CPCC21D6/005C21D8/065C22C38/02C22C38/04C22C38/06
Inventor 韩福生汪聃王文王新福王幸福
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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