Ferrite steel plate with heterogeneous structure and preparation method thereof

A technology of heterogeneous structure and ferritic steel, applied in the direction of manufacturing tools, welding equipment, metal rolling, etc., can solve the problem that the steel plate cannot take into account high strength and high plasticity at the same time, so as to achieve good weld bead surface formation and ensure strength Effect

Active Publication Date: 2018-08-17
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a ferritic steel plate with a heterogeneous structure, so as to solve the problem that the existing steel plate cannot take into account both high strength and high plasticity

Method used

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  • Ferrite steel plate with heterogeneous structure and preparation method thereof
  • Ferrite steel plate with heterogeneous structure and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of the heterogeneous structure ferritic steel plate of this embodiment includes:

[0025] (1) Use ferritic steel welding consumables to surfacing ferrite surfacing layers on both sides of the ferritic steel plate. The surfacing welding conditions are: welding current 160A, welding voltage 22V, wire feeding speed 450mm / min, walking The speed is 250mm / min, the flow rate of argon shielding gas is 10L / min, the angle of the workbench is 15°, the height of the welding torch from the ferritic steel plate is 4mm; the overlap between two adjacent weld beads is 1 / 3 of the weld bead thickness ; The thickness ratio of the ferrite surfacing layer to the ferrite steel plate is 1:2.

[0026] (2) The welded plate was rolled 7 times under the conditions of a rolling speed of 0.3 m / min and a rolling pressure of 0.8 mm per pass.

[0027] (3) The rolled plate was kept at 650° C. for 6 minutes, and then air-cooled to room temperature to obtain a ferritic steel plate ...

Embodiment 2

[0029] The preparation method of the heterogeneous structure ferritic steel plate of this embodiment includes:

[0030] (1) Use ferritic steel welding consumables to surfacing ferrite surfacing layers on both sides of the ferritic steel plate. The surfacing welding conditions are: welding current 200A, welding voltage 26V, wire feeding speed 550mm / min, walking The speed is 350mm / min, the flow rate of argon shielding gas is 20L / min, the angle of the workbench is 20°, the height of the welding gun from the ferritic steel plate is 5mm; the overlap between two adjacent weld beads is 1 / 3 of the weld bead thickness ; The thickness ratio of the ferrite surfacing layer to the ferrite steel plate is 1:3.2.

[0031] (2) Roll the welded sheet for 10 passes under the condition that the rolling speed is 0.5 m / min and the rolling pressure per pass is 1.2 mm.

[0032] (3) The rolled plate was kept at 750° C. for 4 minutes, and then air-cooled to room temperature to obtain a ferritic steel p...

Embodiment 3

[0034] The preparation method of the heterogeneous structure ferritic steel plate of this embodiment includes:

[0035] (1) Use ferritic steel welding consumables to surfacing ferrite surfacing layers on both sides of the ferritic steel plate. The surfacing welding conditions are: welding current 170A, welding voltage 23V, wire feeding speed 480mm / min, walking The speed is 280mm / min, the flow rate of argon shielding gas is 14L / min, the angle of the workbench is 16°, the height of the welding torch from the ferritic steel plate is 4.2mm; the overlap between two adjacent weld beads is 1 / of the weld bead thickness 3. The thickness ratio of the ferrite surfacing layer to the ferrite steel plate is 1:2.5.

[0036] (2) Roll the welded plate for 8 passes under the condition that the rolling speed is 0.4 m / min and the rolling pressure per pass is 1 mm.

[0037] (3) The rolled plate was kept at 680° C. for 5 minutes, and then air-cooled to room temperature to obtain a ferritic steel ...

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Abstract

The invention discloses a ferrite steel plate with a heterogeneous structure and a preparation method of the ferrite steel plate, and belongs to the technical field of steel plate preparation. According to the preparation method, coarse grains and fine grains are reasonably mixed through resurfacing welding, rolling and annealing, so that the problem that the plasticity of an existing steel plateis relatively poor is solved, the strength of the plate is guaranteed, and finally the toughness of the steel plate is guaranteed. The preparation method is simple, the processing efficiency is improved, the cost is saved, and the microscopic structure and the macroscopic mechanical property of a workpiece are effectively regulated and controlled.

Description

technical field [0001] The invention relates to the technical field of steel plate preparation, in particular to a heterogeneous structure ferrite steel plate and a preparation method thereof. Background technique [0002] As one of the most important structural materials, steel materials play a pivotal role in the national economy. The new generation of steel materials is constantly developing towards low density, high strength and high toughness. Traditional iron and steel materials mainly regulate the comprehensive performance of the plate through the material alloy composition, phase composition, grain size, etc., to meet the relevant performance requirements. Traditional steel is generally obtained through smelting, rolling, and overall heat treatment. The grain size inside the steel plate is relatively uniform, and the mechanical properties of each area are similar. In order to obtain high-strength performance, the usual method is to optimize the performance of the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/02B23K9/04B21B1/38
Inventor 李达杨先锋陈兵王玉辉
Owner SOUTHWEST JIAOTONG UNIV
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