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Corrosion and cracking resistant high manganese austenitic steels containing passivating elements

A technology of alloying elements and alloy steels, applied in the field of high manganese austenitic steel composition, high manganese steel composition with corrosion resistance and/or crack resistance, can solve the problem of ductility loss, etc., and achieve improved corrosion resistance sexual effect

Inactive Publication Date: 2018-05-11
EXXON RES & ENG CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of these low-Ni steels show a strong increase in yield strength and severe damage associated with the precipitation of carbides, nitrides and / or carbonitrides when exposed to elevated temperatures in the range of about 600°C to about 900°C. loss of ductility

Method used

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  • Corrosion and cracking resistant high manganese austenitic steels containing passivating elements
  • Corrosion and cracking resistant high manganese austenitic steels containing passivating elements
  • Corrosion and cracking resistant high manganese austenitic steels containing passivating elements

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Embodiment 1

[0112] Exemplary alloys of the present disclosure were prepared by vacuum induction melting. Prior to melting, the nominal chemical composition of the steel composition was about 20% by weight Mn, about 18% by weight Cr, about 0.6% by weight C, about 0.4% by weight N, and the balance Fe. Iron-containing steel compositions were fabricated by vacuum induction melting in a controlled environment where evaporative losses of N and Mn were controlled to produce liquid alloy steels.

[0113] The liquid alloy steel was then poured into water-cooled Cu (copper) molds to form a homogeneous ingot (and at the same time suppress Mn segregation), and then cooled to about ambient temperature.

[0114] The ingot is then hot deformed at temperatures above about 800°C to control grain size and form the alloy steel into cylindrical rods.

[0115] Some rods were then reheated / solution heat treated at about 1200°C for about 1 hour to substantially dissolve the minor phase formed during heat defor...

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Abstract

Improved steel compositions and methods of making the same are provided. The present disclosure provides advantageous corrosion and / or cracking resistant steel. More particularly, the present disclosure provides high manganese (Mn) steel compositions having enhanced corrosion and / or cracking resistance, and methods for fabricating high manganese steel compositions having enhanced corrosion and / orcracking resistance. Methods for fabricating high manganese steel compositions (e.g., via passivation) having enhanced corrosion and / or cracking resistance are also provided.

Description

technical field [0001] The present disclosure relates to improved steel compositions and methods of making the same, and more particularly to high manganese (Mn) austenitic steel compositions with enhanced corrosion resistance and / or cracking resistance and for the manufacture of Corrosion and / or cracking resistance of high manganese steel compositions (for example by passivation). Another object of the present disclosure is to provide equipment and components fabricated from such austenitic high Mn steels that can have high strength, improved resistance to sweet and sour corrosion, and resistance to environmentally induced cracking (including sulfide stress cracking and stress cracking). corrosion cracking) combination. Background technique [0002] Carbon steel is widely used as a structural material in the oil, gas and petrochemical industries. The upstream sector of these industries is a major user of structural materials, with the use of carbon steel accounting for ap...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C38/02C22C38/20C22C38/22C22C38/24C22C38/26C22C38/28C22C38/30C22C38/32C22C38/34C22C38/38C22C38/42C22C38/44C22C38/46C22C38/48
CPCC21D1/28C22C37/08C22C38/001C22C38/04C22C38/20C22C38/22C22C38/24C22C38/26C22C38/28C22C38/30C22C38/32C22C38/34C22C38/38C22C38/40C21D6/002C21D8/0226C21D8/0236C21D8/0263C21D2211/004C21D6/004C21D6/005C21D6/007C21D6/008C21D8/005C21D2211/001C22C33/006C22C33/04C22C38/002C22C38/02C22C38/06C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/52C22C38/54C22C38/58C21D7/02C22C1/02C21D7/13
Inventor 陈炫佑林洵马宁
Owner EXXON RES & ENG CO
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