Method for preparing high-intensity and high-plasticity iron steel material with high manganese and aluminum contents

A steel material, high-strength technology, applied in the direction of temperature control, metal rolling, manufacturing tools, etc., to achieve the effect of good application prospects, simple preparation method and low cost

Inactive Publication Date: 2011-01-19
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing high-strength and high-plasticity steel materials with high manganese and high aluminum content, which solves the problem of high aging treatment temperature and time in the existing technology. Long, not conducive to large-scale production problems

Method used

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  • Method for preparing high-intensity and high-plasticity iron steel material with high manganese and aluminum contents
  • Method for preparing high-intensity and high-plasticity iron steel material with high manganese and aluminum contents
  • Method for preparing high-intensity and high-plasticity iron steel material with high manganese and aluminum contents

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Experimental program
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Effect test

Embodiment 1

[0026] 1. Using traditional vacuum smelting and hot rolling, cold rolling process to prepare steel plate

[0027] Smelting process: Vacuum smelting in an electromagnetic induction furnace, filled with argon for protection. Its composition is

[0028] C%: 0.96wt%, Mn%: 26.7wt%, Al%: 10.9wt%, S%2 .

[0029] Rolling process: using rolling technology, hot rolling and cold rolling, the heating temperature of hot rolling is 1200 ℃, after 3 hours of heat preservation, hot rolling on a 350 two-roll hot rolling mill to obtain a hot rolling with a thickness of about 2.5 to 3.5mm. For thin plate rolling, the total deformation is 80-90%, and the starting rolling and finishing rolling temperatures are 1100°C and 850°C respectively. Cold rolled on a 430 four-roll cold rolling mill, cold rolled to a 1.0mm thick sheet, and heat treated.

[0030] 2. Heat treatment process: the 1.0mm thick cold-rolled steel plate is set at a temperature of 1100°C in a heating furnace, kept for 15 minutes, an...

Embodiment 2

[0033] The difference from Example 1 is that the heat treatment temperature is controlled at 750° C. for 20 minutes and then cooled to room temperature at a rate of 10° C. / s. The properties obtained were: tensile strength of 1310 MPa, yield strength of 1240 MPa and elongation of 10.5%.

Embodiment 3

[0035] The difference from Example 1 is that the heat treatment temperature is controlled at 1300° C. for 10 minutes and then cooled to room temperature at a rate of 30° C. / s. The properties obtained were: tensile strength of 815 MPa, yield strength of 550 MPa, and elongation of 51.0%.

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Abstract

A method for preparing a high-intensity and high-plasticity iron steel material with high manganese and aluminum contents belongs to the processing field of iron steel materials. A high-intensity and high-plasticity iron steel material with high manganese and aluminum contents includes the following components: C%: 0.6-1.2wt%, Mn%: 18-33wt%, Al%: 8-13wt%, S% less than 0.008%, P% less than 0.02%, Fe or inevitable impurities in balancing amount. The preparation methods comprises steps as follows: a material plate blank after the smelting preparation is prepared in the processes of heat rolling and cold rolling, the thickness of a cold-rolled plate is 0.8-1.5 mm, and the cold-rolled steel plate keeps the temperature of 700-1300 DEG C for 10-20 minutes in a heating furnace and cools at the speed of 10-50 DEG C / s to the room temperature. The invention can achieve different levels of intensity and plasticity proportions through process control, and the performance includes shear strength being 540-1240 MPa, tensile strength being 780-1310 MPa and extensibility being 10.0-76.0%. The high-intensity and high-plasticity iron steel material with high manganese and aluminum contents prepared by the invention plays a significant role and has great application space for the booming automobile industry and the military industry.

Description

technical field [0001] The invention belongs to the field of iron and steel material preparation, and relates to a high-strength, high-plasticity induced plasticity steel with high manganese and high aluminum content. Background technique [0002] Fe-Mn-Al-C alloy is developed on the basis of Fe-Mn-C base and Fe-Mn-Al base alloy, which provides a new way for the development of high manganese steel. Due to the relatively low density of Al, this material has a high strength-to-weight ratio. Compared with iron alloys of the same strength level, the weight can be reduced by 14-20%. Therefore, this steel material can be used for high-strength structural components that require weight reduction, especially for the weight reduction of automobiles. [0003] The research on Fe-Mn-Al-C alloys mainly focuses on the following two directions: The mechanical properties of Fe-Mn-Al-based alloys with relatively high Al and C content have been extensively studied. These studies are mainly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D8/02C22C38/06B21B37/74B21B37/16
Inventor 米振莉唐荻江海涛代永娟李慎升吕建崇
Owner UNIV OF SCI & TECH BEIJING
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