A kind of anti-hydrogen and anti-hydrogen sulfide corrosion steel forging and its production process

A technology of anti-hydrogen sulfide and production process, which is applied in the field of forgings and its production process, can solve the problems that the anti-hydrogen and anti-hydrogen sulfide corrosion performance cannot reach a high technical level, and achieve uniformity of structure, obvious effect, and microstructure The effect of refinement is obvious

Active Publication Date: 2014-10-08
WUXI PAIKE HEAVY CASTING & FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although relevant standards have been formulated in China, there is less comprehensive research and relevant data accumulation; martensite is the most sensitive to stress corrosion, and stress corrosion cracking is most likely to occur in hydrogen sulfide environments. How to avoid more martensite in the production process The formation is also a technical problem to be solved for a long time; in the existing technology, the key equipment and important parts of the petrochemical industry working under the conditions of high hydrogen, high sulfur and hydrogen sulfide still cannot achieve high corrosion resistance to hydrogen and hydrogen sulfide technical level

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The hydrogen and hydrogen sulfide corrosion-resistant steel forgings in this embodiment have the following mass percentages of chemical components: C: 0.01%, Si: 0.6%, Mn: 0.9%, P: 0.01%, S: 0.003%, Cr: 28.6 %, Mo: 0.1%, Nb: 0.06%, V: 0.07%, Ti: 0.005%, B: 0.005%, Al: 0.07%, Cu: 0.03%, Co: 0.014%, N: 0.03%, composite rare earth: 0.17%, the balance is Fe; the mass percentages of the composite rare earth components are: lanthanum: 12%, cerium: 18%, scandium: 19%, yttrium: 9%, samarium: 7%, neodymium: 11%, gadolinium : 7%, praseodymium: 1%, dysprosium: 15%, other lanthanides: 1%.

[0030] The production process of hydrogen and hydrogen sulfide corrosion-resistant steel forgings in this embodiment is carried out according to the following procedures: material selection - blanking - heating before forging - forging - heat treatment after forging - ring rolling - tempering after rolling - cooling - physical and chemical inspection - ultrasonic Flaw detection - cleaning - pac...

Embodiment 2

[0040] The mass percent of the hydrogen and hydrogen sulfide corrosion resistant steel forgings in this embodiment is: C: 0.02%, Si: 0.7%, Mn: 1.0%, P: 0.005%, S: 0.002%, Cr: 28.7 %, Mo: 0.2%, Nb: 0.07%, V: 0.08%, Ti: 0.006%, B: 0.006%, Al: 0.08%, Cu: 0.04%, Co: 0.015%, N: 0.04%, composite rare earth: 0.18%, the balance is Fe; the mass percentage of the composite rare earth components is: lanthanum: 15%, cerium: 15%, scandium: 16%, yttrium: 11%, samarium: 8%, neodymium: 13%, gadolinium : 8%, praseodymium: 2%, dysprosium: 10%, other lanthanides: 2%.

[0041] The production process of hydrogen and hydrogen sulfide corrosion-resistant steel forgings in this embodiment is carried out according to the following procedures: material selection - blanking - heating before forging - forging - heat treatment after forging - ring rolling - tempering after rolling - cooling - physical and chemical inspection - ultrasonic Flaw detection - cleaning - packaging;

[0042] The heating proces...

Embodiment 3

[0051] The hydrogen and hydrogen sulfide corrosion-resistant steel forgings in this embodiment have the following mass percentages of chemical components: C: 0.03%, Si: 0.8%, Mn: 1.1%, P: 0.007%, S: 0.004%, Cr: 28.8 %, Mo: 0.3%, Nb: 0.08%, V: 0.09%, Ti: 0.007%, B: 0.007%, Al: 0.09%, Cu: 0.05%, Co: 0.016%, N: 0.05%, composite rare earth: 0.19%, the balance is Fe; the mass percentage of the composite rare earth components is: lanthanum: 13%, cerium: 16%, scandium: 17%, yttrium: 10%, samarium: 9%, neodymium: 12%, gadolinium : 9%, praseodymium: 3%, dysprosium: 8%, other lanthanides: 3%.

[0052] The production process of hydrogen and hydrogen sulfide corrosion-resistant steel forgings in this embodiment is carried out according to the following procedures: material selection - blanking - heating before forging - forging - heat treatment after forging - ring rolling - tempering after rolling - cooling - physical and chemical inspection - ultrasonic Flaw detection - cleaning - pack...

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Abstract

The invention is a hydrogen and hydrogen sulfide corrosion resistant steel forging and its production process, chemical composition: C: 0.01-0.03%, Si: 0.6-0.8%, Mn: 0.9-1.1%, P: <0.015%, S : <0.005%, Cr: 28.6-28.8%, Mo: 0.1-0.3%, Nb: 0.06-0.08%, V: 0.07-0.09%, Ti: 0.005-0.007%, B: 0.005-0.007%, Al: 0.07 -0.09%, Cu: 0.03-0.05%, Co: 0.014-0.016%, N: 0.03-0.05%, compound rare earth: 0.17-0.19%, and the balance is Fe. The forging of the invention can obtain fine, complete and high dislocation density ferrite and austenite structures, and has outstanding resistance to hydrogen and hydrogen sulfide corrosion.

Description

technical field [0001] The invention relates to a forging and its production process, in particular to a hydrogen and hydrogen sulfide corrosion resistant steel forging and its production process. Background technique [0002] The development of stainless steel has a history of nearly 100 years. With the expansion of the use of stainless steel and the continuous increase of varieties, its performance is also expanding, and the requirements for quality of use are constantly improving. Key equipment and important components in the petrochemical industry working under high hydrogen, high sulfur and hydrogen sulfide conditions need to have high resistance to hydrogen and hydrogen sulfide corrosion. According to the working conditions of the equipment abroad, the use and development of hydrogen-resistant steel forgings was earlier, and there were many studies on the corrosion resistance of different materials to hydrogen, sulfur and hydrogen sulfide, and many standards were formu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/32C21D8/00
Inventor 是玉丰
Owner WUXI PAIKE HEAVY CASTING & FORGING
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