Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of low-density cold-rolled medium manganese steel plate and preparation method thereof

A manganese steel sheet and low-density technology, applied in the field of low-density cold-rolled medium-manganese steel sheet and its preparation, can solve the problems of lowering tensile strength and lowering density, and achieve the effects of improving strength, realizing light weight, and improving microhardness

Active Publication Date: 2020-03-31
NORTHEASTERN UNIV LIAONING
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, adding a small amount of Al can reduce the density of manganese steel in the Fe-Mn-C series under the premise of ensuring high strength and plasticity, but with the increase of Al content, the volume of ferrite in the Fe-Mn-Al-C series steel structure The fraction increases, and the tensile strength is in the range of 694-828MPa, which significantly reduces the tensile strength of the steel, which limits the application of Al-containing low-density medium-manganese steel in the automotive industry

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of low-density cold-rolled medium manganese steel plate and preparation method thereof
  • A kind of low-density cold-rolled medium manganese steel plate and preparation method thereof
  • A kind of low-density cold-rolled medium manganese steel plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] A low-density cold-rolled medium-manganese steel plate. The components of the medium-manganese steel are: C: 0.2%, Mn: 10.0%, Al: 6.5%, Ni: 2.89%, and the balance is Fe and impurities.

[0070] A kind of preparation method of low-density cold-rolled medium manganese steel plate of the present invention, carry out according to the following steps:

[0071] Step 1, smelting:

[0072] Steel ingots are obtained by smelting and casting according to the composition ratio of low-density cold-rolled medium-manganese steel sheets;

[0073] Step 2, forging:

[0074] Heat the steel ingot to 1180°C, keep it warm for 2 hours, and forge it into a billet with a cross-sectional area of ​​100mm×30mm;

[0075] Step 3, hot rolling:

[0076] The steel billet is put into a high-temperature furnace and heated from room temperature to 1180°C, and held for 2 hours. After 8 passes of hot rolling, the initial rolling temperature is 1130°C, the final rolling temperature is 860°C, the total red...

Embodiment 2

[0091] A low-density cold-rolled medium-manganese steel plate. The components of the medium-manganese steel are: C: 0.23%, Mn: 10.33%, Al: 6.03%, Ni: 3.87%, and the balance is Fe and impurities.

[0092] A kind of preparation method of low-density cold-rolled medium manganese steel plate of the present invention, carry out according to the following steps:

[0093] Step 1, smelting:

[0094] Steel ingots are obtained by smelting and casting according to the composition ratio of low-density cold-rolled medium-manganese steel sheets;

[0095] Step 2, forging:

[0096] Heat the steel ingot to 1200°C, keep it warm for 2 hours, and forge it into a billet with a cross-sectional area of ​​100mm×30mm;

[0097] Step 3, hot rolling:

[0098] The steel billet is put into a high-temperature furnace and heated from room temperature to 1200°C, and held for 2 hours. After 8 passes of hot rolling, the initial rolling temperature is 1140°C, the final rolling temperature is 850°C, and the to...

Embodiment 3

[0114] A low-density cold-rolled medium-manganese steel plate. The components of the medium-manganese steel are: C: 0.25%, Mn: 11.02%, Al: 6.17%, Ni: 5.02%, and the balance is Fe and impurities.

[0115] A kind of preparation method of low-density cold-rolled medium manganese steel plate of the present invention, carry out according to the following steps:

[0116] Step 1, smelting:

[0117] Steel ingots are obtained by smelting and casting according to the composition ratio of low-density cold-rolled medium-manganese steel sheets;

[0118] Step 2, forging:

[0119]Heat the steel ingot to 1220°C, keep it warm for 2 hours, and forge it into a billet with a cross-sectional area of ​​100mm×30mm;

[0120] Step 3, hot rolling:

[0121] Put the billet into a high-temperature furnace and heat it from room temperature to 1220°C, hold it for 2 hours, and go through 8 passes of hot rolling. Obtain hot-rolled plate;

[0122] Step 4, heat treatment after rolling:

[0123] (1) Heat t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
yield strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

A low-density cold-rolled medium-manganese steel plate and a preparation method thereof, belonging to the field of advanced high-strength steel technology; the components of the medium-manganese steel in weight percentage are: C: 0.20~0.25%, Mn: 10.0~11.0%, A1: 6.03~7.0 %, Ni: 3.0~7.72%, the balance is Fe and impurities; method: 1) smelt the steel ingot according to the composition ratio; 2) heat and forge; 3) perform multi-pass hot rolling of the billet; 4) rapidly conduct hot-rolled plates Quenching and then tempering treatment; 5) Pickling the tempered experimental steel; 6) Cold rolling; 7) The cold-rolled plate is subjected to critical annealing treatment to obtain a low-density cold-rolled medium manganese steel plate; the present invention changes the steel plate According to the chemical composition of the steel plate, an appropriate proportion of Ni element is added, and the heat treatment process of cold rolling + critical annealing is used to significantly improve the strength of the steel plate without reducing the elongation of the steel plate.

Description

technical field [0001] The invention belongs to the technical field of advanced high-strength steel, in particular to a low-density cold-rolled medium manganese steel plate and a preparation method thereof. Background technique [0002] The automobile industry is one of the largest and most important industries in the world. The development level and strength of the automobile industry also reflect a country's comprehensive national strength and competitiveness to a certain extent. my country's auto industry has experienced rapid development in the past ten years, which has played a huge role in stimulating economic development and made a high contribution to the growth of GDP. However, at the same time, the development of the auto industry has also brought our country a series of energy and environmental issues. Automobile lightweight is an effective and feasible measure to solve the energy and environmental protection problems brought about by the development of the automo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/06C22C38/08C21D8/02
CPCC21D8/0205C21D8/0226C21D8/0236C21D8/0247C21D8/0273C22C38/04C22C38/06C22C38/08
Inventor 蔡志辉景颂扬张凯鸣丁桦铁镝
Owner NORTHEASTERN UNIV LIAONING