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

A steel material, high-strength technology, used in temperature control, metal rolling, manufacturing tools, etc., can solve the problems of high aging treatment temperature, unfavorable large-scale production, long time, etc., and achieves simple preparation method, low cost, Good application prospects

Inactive Publication Date: 2009-06-03
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

[0024] 1. Using traditional vacuum smelting and hot rolling, cold rolling process to prepare steel plate

[0025] Smelting process: Vacuum smelting in an electromagnetic induction furnace, filled with argon for protection. Its composition is

[0026] C%: 0.96wt%, Mn%: 26.7wt%, Al%: 10.9wt%, S%2 .

[0027] 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.

[0028] 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

[0031] 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

[0033] 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 Applications(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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