Non-magnetic high manganese steel sheet with high strength and manufacturing method thereof

a high-tensile steel, non-magnetic technology, applied in the direction of manufacturing tools, furnaces, heat treatment equipment, etc., can solve the problems of loss of electrical current high cost of stainless steel, etc., to increase the stability of austenite, high degree of formability, and high stability of austeni

Inactive Publication Date: 2015-07-30
POHANG IRON & STEEL CO LTD
View PDF0 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]According to the present disclosure, a high manganese steel sheet having high austenite stability and non-magnetic properties is provided. Aluminum (Al) is added to the steel sheet to prevent carbon from forming carbides and to thus further increase the stability of austenite. Therefore, the steel sheet has a high degree of formability as well as a high degree of strength. The steel sheet has a sufficient degree of rigidity and thus can be used to form a structural member of a large transformer.

Problems solved by technology

However, such stainless steel is expensive and may not have sufficient strength.
However, ferritic and martensitic stainless steels have high-quality magnetic properties that cause eddy currents and thus the loss of electrical currents.
In addition, ferritic or martensitic stainless steel is very expensive.

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
  • Non-magnetic high manganese steel sheet with high strength and manufacturing method thereof
  • Non-magnetic high manganese steel sheet with high strength and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0048]Steel slabs having the following compositions were reheated to 1200° C., and a finish hot rolling was performed on the steel slabs at 900° C. to form steel sheets. Thereafter, the steel sheets were coiled at 500° C. and then cold-rolled with a reduction ratio of 50%. The cold-rolled steel sheets were continuously annealed at 800° C.

TABLE 1No.CMnSiPSAlTiBN10.6117.960.010.090.0040.010.0660.0020.009720.6118.300.010.090.0031.500.0860.0020.008730.6118.500.010.090.0032.690.0830.0030.006540.6114.540.010.100.0050.010.0770.0020.009850.6115.100.010.090.0061.510.0850.0020.008160.6115.540.010.090.0051.970.0850.0020.006970.6111.580.010.100.0050.010.0680.0020.009580.6111.630.010.100.0061.460.0870.0020.003990.6112.410.010.100.0041.950.0920.0020.0069

[0049]The yield strength, tensile strength, and elongation of each of the steel sheets were measured a shown in Table 2 so as to inspect physical properties of the steel sheets.

TABLE 2No.Yield strength (MPa)Tensile strength (MPa)Elongation (%)1484...

embodiment 2

[0055]Steel slabs having the following compositions (weight %) were reheated to 1200° C., and a finish hot rolling was performed on the steel slabs at 900° C. to form steel sheets. Thereafter, the steel sheets were coiled at 500° C. and then cold-rolled at a reduction ratio of 50%. The cold-rolled steel sheets were continuously annealed at 800° C.

TABLE 4Sample No.CMnPSAlSiTiBN10.6118.00.0910.0040.010.010.06620.00210.009720.6118.30.0870.00341.490.010.08570.00230.008730.6018.30.0870.00241.930.010.08560.00230.007840.6118.50.0900.00272.680.010.08330.00250.006550.6114.50.0970.00510.020.010.07660.00210.009860.6115.10.0940.00551.510.010.08540.00240.008170.6115.50.0940.00491.970.010.08460.00240.006980.6111.60.1010.00530.010.010.06840.0020.009590.6111.60.1020.00571.450.010.08680.00230.0039100.6112.40.0980.00391.940.010.09150.00220.0069110.6118.30.0920.00410.510.010.06620.00210.0037120.6218.40.0910.00421.020.010.08570.00230.0087130.6118.20.0930.00411.210.010.08560.00230.0078140.6118.30.0920.0...

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
elongationaaaaaaaaaa
tensile strengthaaaaaaaaaa
temperatureaaaaaaaaaa
Login to view more

Abstract

The present invention relates to a non-magnetic high manganese steel sheet with high-strength, which has superior strength and moldability, and at the same time, can obtain superior non-magnetic characteristics, and a method for manufacturing the same.

Description

TECHNICAL FIELD[0001]The present disclosure relates to a non-magnetic high manganese steel sheet having a high degree of strength for use as a material for heavy electrical machinery such as switchboards and transformers.BACKGROUND ART[0002]In general, materials for equipment such as switchboards and transformers are required to have high degrees of strength as well as good non-magnetic properties.[0003]In the related art, stainless steel having high nickel and chromium contents and satisfying the requirements for high strength and non-magnetivity is used in such applications. However, such stainless steel is expensive and may not have sufficient strength.[0004]Ferritic or martensitic stainless steel may be used as alternatives to satisfy the requirement for high strength. However, ferritic and martensitic stainless steels have high-quality magnetic properties that cause eddy currents and thus the loss of electrical currents. In addition, ferritic or martensitic stainless steel is v...

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 Applications(United States)
IPC IPC(8): C21D9/46C21D6/00C22C38/00C22C38/06C22C38/04C22C38/02C21D8/02C22C38/14
CPCC21D9/46C21D8/0263C21D8/0226C21D8/0236C21D8/0205C22C38/001C22C38/14C22C38/06C22C38/04C22C38/02C22C38/002C21D6/005
Inventor KIM, SUNG-KYUCHIN, KWANG-GEUNOH, PII-YONGHWANG, HYUN-GYU
Owner POHANG IRON & STEEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap