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Processing technology of corrosion-resistant butterfly valve flap

A processing technology and butterfly valve valve technology, applied in the field of valve disc, can solve the problems of poor corrosion resistance of butterfly valve disc, slow processing speed, low material utilization rate, etc., to ensure corrosion resistance, high pass rate and long service life. Effect

Inactive Publication Date: 2017-04-26
SUZHOU NIUDONG PRECISION MFG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in the butterfly valve industry, domestic butterfly valve discs are made of ordinary high-speed steel materials, or stainless steel materials are used to machine butterfly valve discs. The processed butterfly valve discs have poor corrosion resistance, and the processing speed is slow, and the material utilization rate is not high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment provides a processing technology for a corrosion-resistant butterfly valve disc, which specifically includes the following steps:

[0029] (1) Preparation of mixed powder raw materials, the powder raw materials include the following components by mass percentage:

[0030] Mg: 2%, Fe: 3%, Zn: 1%, Si: 1%, Cu: 0.08%, Mn: 0.2%, Cr: 0.1%, Ti: 0.05%, Ta: 0.02%, graphite powder: 5% , zircon sand: 3%, the rest is aluminum, and then the valve disc blank is obtained by pressing and sintering;

[0031] (2) Solid solution the valve disc blank at 250°C for 10h, water quenching at room temperature, artificial aging at 175°C for 8h, air cooling to room temperature, and then heat-treat the blank to obtain a semi-finished product. The specific heat treatment process is as follows:

[0032] a Annealing, heat the valve flap blank furnace to 300 ° C for 11 minutes, then cool the furnace to 250 ° C, then open the furnace door and continue to cool slowly to 100 ° C, take out...

Embodiment 2

[0040] This embodiment provides a processing technology for a corrosion-resistant butterfly valve disc, which specifically includes the following steps:

[0041] (1) Preparation of mixed powder raw materials, the powder raw materials include the following components by mass percentage:

[0042] Mg: 6%, Fe: 5%, Zn: 2%, Si: 1.5%, Cu: 0.09%, Mn: 0.4%, Cr: 0.4%, Ti: 0.09%, Ta: 0.04%, graphite powder: 9% , zircon sand: 5%, the rest is aluminum, and then the valve disc blank is obtained by pressing and sintering;

[0043] (2) Solid solution the valve disc blank at 300°C for 12h, water quenching at room temperature, artificial aging at 185°C for 10h, air cooling to room temperature, and then heat-treat the blank to obtain a semi-finished product. The specific heat treatment process is as follows:

[0044] a Annealing, heat the valve disc blank furnace to 350 ° C for 17 minutes, then cool the furnace to 260 ° C, then open the furnace door and continue to cool slowly to 100-150 ° C, t...

Embodiment 3

[0052] This embodiment provides a processing technology for a corrosion-resistant butterfly valve disc, which specifically includes the following steps:

[0053] (1) Preparation of mixed powder raw materials, the powder raw materials include the following components by mass percentage:

[0054]Mg: 4%, Fe: 4%, Zn: 1%, Si: 1.2%, Cu: 0.09%, Mn: 0.3%, Cr: 0.3%, Ti: 0.07%, Ta: 0.03%, graphite powder: 7% , zircon sand: 4%, the rest is aluminum, and then the valve disc blank is obtained by pressing and sintering;

[0055] (2) Solid solution the valve disc blank at 280°C for 11 hours, water quenching at room temperature, artificial aging at 180°C for 9 hours, air cooling to room temperature, and then heat-treat the blank to obtain a semi-finished product. The specific heat treatment process is as follows:

[0056] a Annealing, heat the valve flap blank furnace to 320 ° C for 15 minutes, then cool the furnace to 255 ° C, then open the furnace door and continue to cool slowly to 130 ° ...

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Abstract

The invention discloses a processing technology of a corrosion-resistant butterfly valve flap. The processing technology comprises the steps of raw material preparation, compression, sintering molding, heat treatment, phosphating treatment, inspection and warehousing. The processing technology is simple and easy to operate, the processed butterfly valve flap has good corrosion resistance, the service life is prolonged and the cost is reduced.

Description

technical field [0001] The invention relates to a valve disc, in particular to a processing technology for a corrosion-resistant butterfly valve disc. Background technique [0002] Butterfly valve, also known as flap valve, is a regulating valve with simple structure. It can also be used for switch control of low-pressure pipeline medium. Butterfly valve refers to a valve whose closing part is a disc, which rotates around the valve shaft to achieve opening and closing. It mainly plays the role of cutting and throttling on the pipeline. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate, which rotates around its own axis in the valve body, so as to achieve the purpose of opening and closing or regulating. The butterfly valve is suitable for generators, gas , Natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting, power generation and environmental protection and other engineering systems for transporting various c...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22F1/04
CPCC22C21/00C22C32/0084C22F1/04
Inventor 冉宏敏汪海涛
Owner SUZHOU NIUDONG PRECISION MFG TECH CO LTD
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