Production process of hydrogen sulfide corrosion resistant forge piece

A production process and anti-hydrogen sulfide technology, applied in the field of forgings manufacturing, can solve problems such as corrosion, hydrogen sulfide easily corroded equipment, etc., achieve the effects of reducing P and S content, improving the ability of anti-hydrogen sulfide corrosion, and improving the production process

Pending Publication Date: 2021-09-10
CHENGDU RIJIN METALLURGICAL FORGING CO LTD
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a production process for hydrogen sulfide corrosion resistant forgings, in order to solve the problem that hydrogen sulfide is easy to corrode equipment in the prior art, so as to achieve the purpose of hydrogen sulfide corrosion resistance

Method used

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  • Production process of hydrogen sulfide corrosion resistant forge piece
  • Production process of hydrogen sulfide corrosion resistant forge piece
  • Production process of hydrogen sulfide corrosion resistant forge piece

Examples

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Embodiment 1

[0031] Example 1: Studies have shown that H2S concentration has a significant impact on stress corrosion, and the cracking caused by wet H2S not only includes hydrogen sulfide stress corrosion (SSCC), hydrogen-induced (HIC), stress-oriented hydrogen-induced cracking (SOHIC) and hydrogen bubbling ( HB), etc., its damage sensitivity increases with the increase of H2S concentration, reaching the maximum value in saturated wet hydrogen sulfide.

[0032] The concentration of hydrogen sulfide in the liquid medium is for low carbon steel. When the concentration of H2S in the solution increases from 2PPm to 150PPm, the corrosion rate increases rapidly, but as long as it is less than 50PPm, the destruction time is longer. When the concentration of H2S increases to 1600PPm, the corrosion rate increases rapidly. When it is higher than 1600PPm - 2420PPm, the corrosion rate is basically unchanged, which shows that the corrosion of high-concentration hydrogen sulfide is not more serious than...

Embodiment example 2

[0037] Implementation Case 2: A production process for a hydrogen sulfide corrosion-resistant forging, which includes the following steps in turn: blanking, furnace heating, forging, rough machining, heat treatment, inspection, finished product, and heat treatment. The heat treatment process includes rough The turning workpiece is heated to 910±10°C and kept warm for 240-300 minutes, and naturally cooled to room temperature in the air.

[0038] The blanking includes: removing harmful substances and inclusions from the steel ingot, blanking the material according to the weight and deviation of the bill of materials as required, and making a mark after loading to facilitate identification during furnace loading. The furnace heating includes: according to the heating process Raise the temperature to 1220-1240°C and keep it warm for 90-150 minutes. The forging includes: forging according to the size and technical requirements of the forging, repeatedly upsetting and elongating the ...

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Abstract

The invention discloses a production process of a hydrogen sulfide corrosion resistant forge piece, belongs to the technical field of forge piece manufacturing, and aims to solve the problem that hydrogen sulfide easily corrodes equipment in the prior art. The process sequentially comprises the following steps of feeding, charging and heating, forging, rough machining, heat treatment, inspection, finished product obtaining and heat treatment. The heat treatment technology comprises the steps that a rough turning workpiece is heated to 910 + / -10 DEG C, heat preservation is conducted for 240-300 minutes, and the rough turning workpiece is naturally cooled to the indoor temperature in air. Through the production of the process, the content of sulfur S in the steel is less than or equal to 0.002%, if the content can reach less than or equal to 0.001%, the steel is better, the oxygen content in the steel is limited to be less than or equal to 0.002%, the phosphorus content in the steel is limited to be less than or equal to 0.008%, and the nickel content in the steel is limited, so that the carbon content of the steel is reduced as much as possible under the condition of meeting the mechanical property, and therefore, the hydrogen sulfide corrosion resistance is improved.

Description

technical field [0001] The invention belongs to the technical field of forging manufacture, and in particular relates to a production process of a hydrogen sulfide corrosion-resistant forging. Background technique [0002] As a clean energy, natural gas is widely used in industry and daily life, which brings great convenience to people's life. As a new energy alternative to coal, petroleum and other mineral energy, natural gas is indispensable for reducing environmental pollution and reducing greenhouse gas emissions. [0003] Natural gas is also a kind of gas produced by minerals, which contains harmful substances such as sulfur, and SO will be produced during the combustion process. 2 , NO X At the same time, sulfur in natural gas combines with moisture to produce H 2 S, right and H 2 The equipment in contact with S is severely corroded, causing the equipment to be damaged and unusable within a short period of time. [0004] against H 2 The problem of corrosion of equ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00C21D6/00
CPCB23P15/00C21D6/00C21D2261/00
Inventor 刘勇
Owner CHENGDU RIJIN METALLURGICAL FORGING CO LTD
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