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Pneumatic actuator piston material and preparation method thereof

A technology for pneumatic actuators and electric actuators, applied in the field of piston materials for pneumatic actuators and its preparation, can solve the problems of shortening the service life of pneumatic actuator pistons, corrosion and peeling of pneumatic actuator pistons, and affecting the sensitivity of pneumatic actuators. The effect of small thermal expansion coefficient, excellent hardness performance and good mechanical properties

Inactive Publication Date: 2019-07-30
WUXI CHENGTIANNUO ACTUATOR MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual use, especially in the use of highly corrosive media used in petrochemical industries, it often causes corrosion and peeling inside the piston of the pneumatic actuator, which not only affects the sensitivity and control parameters of the pneumatic actuator, but also shortens the operating time of the pneumatic actuator. The service life of the pneumatic actuator piston leads to the overall scrapping of the entire pneumatic actuator, which also affects the safe production of the enterprise, resulting in high operating costs and poor long-term operation stability of the enterprise. Therefore, it is necessary to improve the existing pneumatic actuator piston through technology material, effectively improve the service life of pneumatic actuators, and meet the promotion and use of petrochemical and other highly corrosive industries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A piston material for a pneumatic actuator according to the present invention and its preparation method, the distribution ratio of each component in terms of weight percentage is: Fe: (wherein gray iron: 0.25, ductile iron 0.33%), Cu: 1.65% , Mg: 0.85%, Mn: 0.18%, Ni: 1.55%, Zn: 1.9%, B 2 o 3 : 0.55%, SiO 2 : 1.85%, TiC: 2.0%, Pt: 0.6%, Ti: 0.45%, Pb: 0.45%, and the rest are Al.

[0019] A piston material for a pneumatic actuator and a preparation method thereof, comprising the following steps,

[0020] (1) Embryo making: Mix the prepared raw materials of each component evenly and add them to the melting furnace, heat up to melt, and after the raw materials are completely melted, adjust the internal temperature of the melting furnace to 750°C for refining treatment, and then Adjust the internal temperature of the melting furnace to 710°C, carry out refining treatment, and finally cool slowly for 6 hours to obtain a Φ250mm cylindrical aluminum alloy billet;

[0021]...

Embodiment 2

[0027] A cylinder for an electric actuator according to the present invention, its distribution ratio of each component in terms of weight percentage is: Fe (wherein gray iron: 0.25%, ductile iron 0.33%), Cu: 1.7%, Mg: 0.8%, Mn: 0.19%, Ni: 1.45%, Zn: 2.0%, B 2 o 3 : 0.5%, SiO 2 : 2.0%, TiC: 2.2%, Pt: 0.65%, Ti: 0.5%, Pb: 0.5%, and the rest are Al.

[0028] A piston material for a pneumatic actuator and a preparation method thereof, comprising the following steps:

[0029] (1) Embryo making: Mix the prepared raw materials of each component evenly and put them into the melting furnace, heat up to melt, and after the raw materials are completely melted, adjust the internal temperature of the melting furnace to 770°C for refining treatment, and then Adjust the internal temperature of the melting furnace to 700°C, carry out refining treatment, and finally cool down slowly for 7 hours to obtain a Φ300mm cylindrical aluminum alloy piston blank;

[0030] (2) Billet pretreatment: f...

Embodiment 3

[0036]A cylinder for an electric actuator according to the present invention, the distribution ratio of each component in terms of weight percentage is: Fe (wherein gray iron: 0.27, ductile iron 0.31%), Cu: 1.7%, Mg: 0.8%, Mn: 0.19%, Ni: 1.45%, Zn: 2.0%, B 2 o 3 : 0.5%, SiO 2 : 2.0%, TiC: 2.2%, Pt: 0.65%, Ti: 0.5%, Pb: 0.5%, and the rest are Al.

[0037] A piston material for a pneumatic actuator and a preparation method thereof, comprising the following steps:

[0038] (1) Embryo making: Mix the prepared raw materials of each component evenly and put them into the melting furnace, heat up to melt, and after the raw materials are completely melted, adjust the internal temperature of the melting furnace to 770°C for refining treatment, and then Adjust the internal temperature of the melting furnace to 795°C, carry out refining treatment, and finally cool down slowly for 8 hours to obtain a Φ400mm cylindrical aluminum alloy piston blank;

[0039] (2) Billet pretreatment: fir...

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PUM

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Abstract

The invention relates to a pneumatic actuator piston material and a preparation method thereof. The piston material comprises, by weight, 0.57% of Fe, 1.65% of Cu, 0.85% of Mg, 0.18% of Mn, 1.55% of Ni, 1.9% of Zn, 0.55% of B2O3, 1.85% of SiO2, 2.0% of TiC, 0.6% of Pt, 0.45% of Ti, 0.45% of Pb and the balance Al. The preparation method of the pneumatic actuator piston comprises the steps of blankforming, blank pretreatment, die pretreatment, forging, forming and polishing treatment. According to the pneumatic actuator piston material and the preparation method thereof, the excellent hardnessperformance, good corrosion resistance, low thermal expansion coefficient, low friction coefficient and high abrasion resistance are achieved, and the characteristics of good mechanical properties, reliable quality and long service life are also achieved.

Description

technical field [0001] The invention relates to the field of cylinder body materials for pneumatic actuators, in particular to a piston material for pneumatic actuators used in thermal power generation industries, petrochemicals, medicine, natural gas pipeline transportation and other enterprises and a preparation method thereof. Background technique [0002] Pneumatic actuators, also known as pneumatic actuators, are mainly used to automatically adjust valves through pneumatic control. Pneumatic control is used to replace manual control of free rotation, automatic opening and closing of valves. It is mainly used to control water, steam, oil and various corrosive or organic media, including various types of flowing liquids and flowing gases. At present, it is widely used in thermal power generation, thermal power plant, petrochemical industry, medicine and food, and natural gas pipeline transportation. Pneumatic actuator is composed of two parts: executive mechanism and aut...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C21/10C22C21/16C22C21/18C22C32/00C22C1/10C22C1/02
CPCC22C21/18C22C21/16C22C21/10C22C21/00C22C21/003C22C32/0005C22C1/1036C22C1/1047
Inventor 徐晶张莹
Owner WUXI CHENGTIANNUO ACTUATOR MFG CO LTD
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