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Austenite steel material having superior ductility

A technology of austenitic steel and ductility, which is applied in the field of austenitic steel with excellent ductility, which can solve the problems of increased alloy content and manufacturing cost, and reduced corrosion resistance level, so as to improve ductility and wear resistance , Improve the effect of corrosion resistance

Inactive Publication Date: 2013-01-30
POHANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this will eventually lead to an increase in alloy content and manufacturing cost, and therefore, research into the addition of elements that are more effective in inhibiting carbide formation than manganese is required to address the above limitations
Also, since the corrosion resistance level of high manganese steel is lowered due to the addition of manganese compared with ordinary carbon-containing steel, its application will be limited in fields requiring corrosion resistance. corrosion research

Method used

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  • Austenite steel material having superior ductility
  • Austenite steel material having superior ductility
  • Austenite steel material having superior ductility

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0048] Hereinafter, the present invention will be explained in detail according to the embodiments. However, the following examples are only used to provide a clearer understanding of the present invention, not to limit its scope.

Embodiment

[0050] Slabs meeting the component systems and composition ranges described in Tables 1 to 4 were manufactured through a series of hot rolling and cooling treatments, and then their microstructure, elongation, strength and magnetic permeability were measured, and the results are listed in Table 2 below. The results of the corrosion rate test according to the immersion test are listed in Table 3 below, and the weight loss of the samples according to the abrasion test (ASTM G65) are listed in Table 4.

[0051] [Table 1]

[0052]

[0053]

[0054] [Table 2]

[0055]

[0056]

[0057] [table 3]

[0058]

[0059] [Table 4]

[0060]

[0061]

[0062] Examples 1 to 13 of the present invention are steels satisfying the component system and composition range controlled in the present invention, and it can be understood that even if slowly cooled, the physical properties will not decrease due to the formation of grain boundary carbides. Specifically, since the a...

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Abstract

In one aspect of the present invention, provided is an austenite steel material having superior ductility, comprising, as percentages by weight, from 8 to 15% of manganese (Mn) and no more than 3% (excluding 0%) of copper (Cu), and having a carbon (C) content satisfying both 33.5C+Mn=25 and 33.5C-Mn=23, and comprising a balance of iron and unavoidable impurities; wherein ductility and abrasion resistance can be improved while at the same time also ensuring superior economic viability as the austenite is stabilised and the occurrence of carbides in network form at austenite grain boundaries is suppressed as a result of the addition of Cu, which is more advantageous in suppressing the formation of carbides than is manganese, and appropriate control of the carbon and manganese contents.

Description

technical field [0001] The present invention relates to an austenitic steel with excellent ductility and wear resistance, corrosion resistance or non-magnetic properties, as steel it is used in industrial machinery and structures requiring ductility and wear resistance, super steels requiring non-magnetic properties In guiding applications and general electronic equipment, in the fields of mining, transportation and storage, and in the oil and gas industry, such as steel for telescopic pipes, steel for slurry pipes or acid-resistant steel, etc. Background technique [0002] Recently, there has been a growing demand for austenitic steels (non-magnetic steels) used as structural materials in superconducting applications such as linear locomotive tracks and fusion reactors, etc., and general electronic devices. A typical example of a non-magnetic steel is AISI 304 (18Cr-8Ni based) austenitic stainless steel. However, AISI 304 austenitic stainless steel may not be economical be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/18
CPCC22C38/04C22C38/20C22C38/16C22C38/38
Inventor 李淳基崔钟教赵县宽卢熙君
Owner POHANG IRON & STEEL CO LTD