Microalloyed high-strength high-plasticity non-magnetic steel plate and manufacturing method thereof

A technology of micro-alloying and manufacturing method, applied in the field of non-magnetic steel sheet and its manufacturing, can solve the problems of easy generation of reticulated carbides, complex production process, high production cost, and achieve reasonable composition and process design, large scope, and low cost. The effect of manufacturing costs

Inactive Publication Date: 2018-12-04
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this steel is that the C content in the steel is too high, and it is easy to produce network carbides in the production process, which is brittle and requires water toughening treatment again. The production process is also complicated and the production cost is also high.

Method used

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  • Microalloyed high-strength high-plasticity non-magnetic steel plate and manufacturing method thereof
  • Microalloyed high-strength high-plasticity non-magnetic steel plate and manufacturing method thereof
  • Microalloyed high-strength high-plasticity non-magnetic steel plate and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6 and comparative example 1

[0043] Table 1 lists the mass percentages of each chemical element in the microalloyed high-strength and high-plasticity non-magnetic steel sheets of Examples 1-6 and the prior art steel sheet of Comparative Example 1.

[0044] Table 1. (wt%, the balance is Fe and other unavoidable impurities except P and S)

[0045] Example

C

Si

mn

P

S

Al

Ti

Nb

1

0.16

0.23

25.78

0.007

0.005

2.08

0.011

0.043

2

0.11

0.26

22.88

0.006

0.0009

2.44

0.018

0.072

3

0.15

0.22

23.14

0.008

0.002

2.88

0.018

0.069

4

0.19

0.28

20.86

0.006

0.005

2.26

0.02

0.088

5

0.14

0.21

25.56

0.007

0.0009

2.35

0.016

0.049

6

0.17

0.31

24.38

0.008

0.003

2.78

0.012

0.071

comparative example

C

Si

mn

P

S

Al

Ti

Nb

1

0.15

0.33

21.52

0.009

0.003

2.6

—

— ...

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Abstract

The invention discloses a microalloyed high-strength high-plasticity non-magnetic steel plate. The non-magnetic steel plate comprises the following chemical elements by mass: 0.10 to 0.20% of C, morethan 0 and no more than 0.4% of Si, 20 to 26% of Mn, 2.0 to 3.0% of Al, 0.01 to 0.02% of Ti and 0.04 to 0.09% of Nb, with the balance being Fe and unavoidable impurities. The matrix structure of the non-magnetic steel plate is fine deformed austenite crystal grains. Accordingly, the invention also discloses a manufacturing method for the non-magnetic steel plate. The manufacturing method comprisesthe following steps: (1) smelting and casting; (2) heating, wherein a heating temperature is 1120 to 1170 DEG C; (3) rolling; and (4) cooling after rolling. The non-magnetic steel plate of the invention adopts a microalloying design, so the non-magnetic steel plate has high strength and good plasticity, with yield strength being 450-510 MPa and tensile strength being 660-710 MPa.

Description

technical field [0001] The invention relates to a steel plate and a manufacturing method thereof, in particular to a non-magnetic steel plate and a manufacturing method thereof. Background technique [0002] Non-magnetic steel refers to steel that does not produce (or produces less) magnetic induction in a strong magnetic field. Its matrix structure is austenite structure with paramagnetism, and its relative magnetic permeability is generally less than 1.32. Non-magnetic steel is widely used in power transmission and transformation industry, automatic control system, precision instrument, motor, rail transit and many military fields. Moreover, with the progress of society and the development of economy, the demand for high-performance non-magnetic steel is increasing day by day. Currently widely used non-magnetic steel mainly includes austenitic stainless steel and 20Mn23AlV high manganese non-magnetic steel. [0003] For austenitic stainless steel, its strength can be imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/06C22C38/14C22C38/12C21D8/12
CPCC21D8/1222C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 张君姚连登赵小婷
Owner BAOSHAN IRON & STEEL CO LTD
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