High-precision valve resistant to abrasion and corrosion and manufacturing method thereof

Abstract

A high-precision valve resistant to abrasion and corrosion comprises a high-strength valve body resistant to abrasion and corrosion and 3D printed high-precision valve internal parts. The high-strength valve body resistant to abrasion and corrosion is made of raw materials in a cast mode, wherein special element matching is adopted for the raw materials. A 3D printing technology is adopted for manufacturing and assembling all the valve internal parts at the same time; finally, the high-strength valve body resistant to abrasion and corrosion and the 3D printed high-precision valve internal parts are assembled. The high-precision valve has the advantages that valve body is excellent in resistance to abrasion and corrosion; the production efficiency and precision of the valve internal parts are high, and the high-precision valve is convenient to assemble and stable in working.

Description

Technical field [0001] The invention belongs to the field of valve manufacturing methods, and specifically relates to a valve manufacturing that uses a special ratio of raw materials to cast a high-strength wear-resistant and corrosion-resistant valve body, and uses 3D printing technology to accurately and quickly manufacture complex valve internals, and assemble the two method. Background technique [0002] At present, valves play a very important role in petroleum, chemical, metallurgical and other fields around the world. Once the valve penetrates due to external friction and corrosion, or fails because the accuracy of the valve internals does not meet the standard, it will not only It will bring serious economic losses to the country and enterprises, and at the same time it will bring about greater social impact. [0003] In the prior art, there are mainly the following methods for improving the wear and corrosion resistance of the valve body: [0004] (1) The more commonly ...

AI Technical Summary

Problems solved by technology

[0004] (1) The more commonly used high-nickel and high-chromium alloy steel is used as the material of the valve body. Although the strength of the valve body is guaranteed and the corrosion process of the valve body can be delayed, this problem cannot be fundamentally solved. When the valve is used for a long time, the valve body will also be deformed and corroded due to friction and collision, and the production cost of high-nickel high-chromium alloy steel is very high, which restricts the promotion of high-nickel high-chromium alloy steel to a certain extent

[0005] (2) Research and develop new materials, aiming at the mechanism of friction and corrosion, try to find wear-resistant and corrosion-resistant metal elements and non-metal elements, and use them in combination. This aspect is not only difficult to study, but also once new materials are used. To achieve satisfactory results, resulting in time-consuming and laborious

[0006] (3) Coating the surface of the valve body and valve internal parts, using a specific method to coat the surface of the valve body and valve internal parts with wear-resistant and corrosion-resistant materials to form one or several layers of wear-resistant and corrosion-resistant layers, although The wear-resistant and corrosion-resistant layer can be repaired and supplemented to maintain the wear-resistant and corrosion-resistant effect, but the spraying effect is relatively high. If the spraying process is not selected properly, the obtained coating structure is relatively loose, and the effective wear-resistant effect cannot be maintained. At the same time, high-pressure corrosive gas can easily invade the valve body through the coating and corrode the valve body; when spraying the valve internals, the coordination between the valve internals and the thickness of the coating must be considered in advance to change accordingly. The size of the valve trim, once the thickness of the coating changes greatly, the valve trim will fail to cooperate; and there is a certain bonding force between the coating and the valve body substrate and the valve trim substrate, the coating and the substrate The binding force not only has a great relationship with their respective materials, but also has a great relationship with the selected spraying process. If the coating and the substrate cannot be effectively combined, the impact and influence of friction, collision and high-pressure corrosive gas under, it is easy to damage the coating