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Production method suitable for low-alloy valve body under acidic working condition

A production method and low-alloy technology, which is applied in the production field of low-alloy valve bodies suitable for acidic working conditions, can solve the problems of poor processing performance and acid resistance, low strength, high strength, etc., to improve quality and high pass rate , long service life effect

Active Publication Date: 2014-12-17
JIANGSU FUJIE HIGH-END EQUIP MFG (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary materials have good acid resistance but low strength; high strength materials have poor processability and acid resistance

Method used

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  • Production method suitable for low-alloy valve body under acidic working condition
  • Production method suitable for low-alloy valve body under acidic working condition

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Embodiment Construction

[0021] Below in conjunction with the embodiment shown in the accompanying drawings, the present invention is described in detail as follows:

[0022] This method is applicable to the production method of low alloy valve body under acidic working conditions, which includes the following steps in sequence: casting, raw material re-inspection, ultrasonic testing, blanking, heating, die forging, shot blasting, grinding, magnetic particle testing, processing, heat treatment , Performance testing, hardness testing, shot blasting, magnetic particle testing, ultrasonic testing, shot blasting, typing, packaging.

[0023] The weight percentages of each chemical element in molten iron are as follows during casting:

[0024] Carbon: 0.28~0.34; Silicon: 0.15~0.37; Manganese: 0.5~0.8; Chromium: 0.8~1.1; Phosphorus: 0.025 or less; Molybdenum: 0.15~0.25; Equal to 0.1; the remainder is iron and unavoidable impurities, and the impurity content is less than 0.01;

[0025] The three classic com...

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Abstract

The invention discloses a production method suitable for a low-alloy valve body under an acidic working condition. The production method mainly comprises the steps of casting, heating, die forging and heat treatment in sequence; molten iron comprises the following chemical elements in percentage by weight in casting: 0.28-0.34% of carbon, 0.15-0.37% of silicon, 0.5-0.8% of manganese, 0.8-1.1% of chrome, phosphorus not higher than 0.025%, 0.15-0.25% of molybdenum, sulfur not higher than 0.025%, nickel not higher than 0.5%, vanadium not higher than 0.1%, and the balance of iron and inevitable impurities; and the content of the impurities is lower than 0.01. The formulas of the raw materials are reasonable; an alloy has improved high acid resistance, high-temperature hardness and high-temperature compression strength, and is suitable for a valve in an acidic occasion; and the valve has the advantages of long service life, high pass percent, largely improved product quality and wide promotion.

Description

technical field [0001] The invention relates to a production method of a low-alloy valve body suitable for acid working conditions. [0002] Background technique [0003] The check valve is suitable for various concentrations of aqua regia, sulfuric acid, hydrochloric acid, hydrofluoric acid and various organic acids, strong acids, strong oxidants at -50 ~ 150 ° C, and is also suitable for various concentrations of strong alkali organic solvents and other corrosion It is used on the pipeline of inert gas and liquid medium. Ordinary materials have good acid resistance but low strength; high strength materials have poor processability and acid resistance. In order to meet the requirements of special working environment and high-pressure transmission, higher requirements are put forward for the corrosion resistance and strength of the valve body material. [0004] Contents of the invention [0005] The object of the present invention is to provide a production method of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/46C22C38/44C22C38/24C22C38/22C21D8/00
Inventor 甘情
Owner JIANGSU FUJIE HIGH-END EQUIP MFG (GRP) CO LTD