Technological requirements for the surfacing process of mechanical valve sealing surfaces
I. Introduction
The surfacing process of mechanical valve sealing surfaces is a key technology in mechanical seal technology. Its main function is to improve the wear resistance, corrosion resistance, and high-temperature resistance of mechanical seals, extend the service life of mechanical seals, and reduce maintenance costs. This article will elaborate on the technological requirements for the surfacing process of mechanical valve sealing surfaces in detail.
II. Technological requirements for the surfacing process of mechanical valve sealing surfaces
Selection of surfacing materials
The selection of surfacing materials is a key factor in the surfacing process of mechanical valve sealing surfaces. Its selection should be based on the characteristics of the sealing surface material and the conditions of the working environment. Usually, commonly used surfacing materials include nickel-based alloys, cobalt-based alloys, and stainless steel. When selecting, considerations should be given to the melting point, hardness, corrosion resistance, wear resistance, and compatibility with the sealing surface material of the surfacing material.
Determination of welding process parameters
Welding process parameters include welding current, voltage, speed, and time. The selection of welding parameters should be determined based on the characteristics of the surfacing material, the characteristics of the sealing surface material, and the conditions of the welding environment. The size of welding current and voltage directly affects the thickness and uniformity of the surfacing layer, while welding speed and time affect the compactness and bonding strength of the surfacing layer.
Selection of welding methods
Welding methods include manual arc welding, automatic welding, submerged arc welding, and gas shielded welding. When selecting a welding method, it should be decided based on the characteristics of the surfacing material, the characteristics of the sealing surface material, and the conditions of the welding environment. Manual arc welding is suitable for surfacing of small and thin-walled parts; automatic welding and submerged arc welding are suitable for surfacing of large and thick-walled parts; gas shielded welding is suitable for complex welding environments.
Control of the welding process
The control of the welding process includes preparation before welding, monitoring during the welding process, and post-welding treatment. The preparation before welding includes cleaning the welding surface, preheating, and selecting appropriate welding materials; the monitoring during the welding process includes monitoring of welding current, voltage, speed, and time; the post-welding treatment includes cooling of the surfacing layer, inspection of the surfacing layer, and polishing of the surfacing layer.
Summary of technological requirements for the surfacing process of mechanical valve sealing surfaces
The technological requirements for the surfacing process of mechanical valve sealing surfaces mainly include the selection of surfacing materials, determination of welding process parameters, selection of welding methods, and control of the welding process. Only by strictly adhering to these technological requirements can the quality of the surfacing process of mechanical valve sealing surfaces be ensured, improving the performance of mechanical seals, and extending the service life of mechanical seals.