What are the material selection and processing requirements for Dampers Gas Springs?

The material selection and processing requirements of the damper gas springs directly affect their performance, durability and safety of use. Since gas springs need to withstand different loads, temperatures and working environments, special attention should be paid to material selection and processing. The following are some key points about the material selection and processing requirements of gas springs:

Material selection requirements for gas springs
Housing material:
The housing usually needs to have high strength and corrosion resistance because it needs to withstand gas pressure and external impact and wear. Common housing materials include carbon steel, stainless steel, aluminum alloy, etc.
Carbon steel: high strength, good wear resistance, low cost, but may be easy to rust in wet or corrosive environments.
Stainless steel: has excellent corrosion resistance, especially suitable for wet and corrosive environments (such as automobiles, outdoor equipment, etc.), but the price is higher.
Aluminum alloy: light weight, suitable for applications that require lightweight (such as aviation, car seats, etc.), but the strength and corrosion resistance are worse than stainless steel.
Piston rod material:
The piston rod usually uses high-strength alloy steel or stainless steel to ensure that it does not deform or damage under the action of gas pressure and friction.

The piston rod surface usually needs special treatment (such as hardening, nickel plating or chrome plating) to increase its wear resistance and corrosion resistance.
Hardening treatment: Hardening treatment can enhance the surface hardness, reduce friction and wear, and extend the service life of the gas spring.
Chrome plating or nickel plating: This surface treatment can improve the corrosion resistance and wear resistance of the piston rod and prevent rust and corrosion.
Sealing material:
The selection of sealing material is crucial because it directly affects the sealing and durability of the gas spring. Commonly used sealing materials include** fluororubber (FKM), polyurethane (PU), nitrile rubber (NBR)**, etc.
Fluororubber: Good high temperature resistance and corrosion resistance, suitable for high temperature and chemical corrosion environment.
Polyurethane: Has good elasticity and wear resistance, suitable for occasions requiring high elasticity and low friction.
Nitrile rubber: Good oil resistance, suitable for liquid environment.
Gas sealing material:
The gas inside the gas spring is usually nitrogen, so the internal seal must be reliable to avoid gas leakage. The use of sealing rings, O-rings, polytetrafluoroethylene (PTFE) and other materials can ensure the sealing effect.
Spring material:
The spring is the key component responsible for providing force output in the gas spring. Commonly used spring materials include high carbon steel, alloy steel, etc. These materials have good elasticity and fatigue strength.
Processing requirements and processes
Shell processing:
Precision welding and molding: The shell of the gas spring needs to be precisely welded to ensure the strength and sealing of the structure. At the same time, the molding process of the shell needs to ensure uniform wall thickness to prevent the gas spring from bursting or leaking due to local weakness.
Surface treatment: The shell usually needs to be polished, sprayed, plated and other processes to increase corrosion resistance and aesthetics. For example, aluminum alloy shells usually require anodizing to enhance their surface hardness and corrosion resistance.
Piston rod processing:
The piston rod needs to be turned, ground and polished with high precision to ensure its surface is smooth and flat, reduce friction and improve sealing.
Chrome plating or nickel plating is often used on the surface of the piston rod to improve its wear resistance and corrosion resistance. The chrome plating layer needs to be uniform and free of pores to ensure stability in long-term use.
Both ends of the piston rod usually need to be processed into threaded or tapered joints for connection with other components.
Seal processing:
The processing requirements of seals and O-rings are high, and usually require precision mold injection molding and ensure dimensional accuracy to ensure good sealing performance.
Since the seal is in direct contact with the gas, its material needs to have good elasticity, temperature resistance and chemical resistance.
Spring processing:
The processing of the spring requires the selection of suitable steel, which is heat treated and cold processed to achieve the required elasticity and durability.
Surface spraying and galvanizing can improve the corrosion resistance and wear resistance of the spring and extend its service life.
Quality control and testing requirements
Dimensional accuracy: The various components of the gas spring (such as housing, piston rod, seal, etc.) need to strictly control the dimensional accuracy to ensure that they meet the design requirements.
Pressure test: The sealing and pressure resistance of the gas spring need to be pressure tested. Common test methods include air tightness test, leakage test, etc.
Fatigue test: The service life of the gas spring is usually evaluated by fatigue test. During the test, the gas spring needs to be repeatedly compressed and stretched under certain load and temperature conditions to simulate the actual working state.
Environmental adaptability test: For gas springs used in special environments, temperature and humidity tests, corrosion resistance tests, etc. are required to ensure that they operate normally in different working environments.
Surface treatment and anti-corrosion requirements
Anti-corrosion treatment: For gas springs used in harsh environments, surface treatment is particularly important. Common anti-corrosion treatments include** spraying, plating (such as galvanizing, chrome plating, anodizing)**, etc. to improve corrosion resistance.
Coating treatment: Anodizing the aluminum alloy or steel shell can increase the surface hardness and improve corrosion resistance.
Manufacturing process innovation and technological development
With the advancement of technology, the materials and processing technology of gas springs are constantly optimized. For example, by using 3D printing technology to manufacture complex gas spring components, or using new high-performance alloy materials to improve their performance and durability.

The material selection and processing technology of gas springs directly affect their performance and service life. When selecting materials, it is necessary to comprehensively consider factors such as strength, corrosion resistance, and high temperature resistance, while during the processing, it is necessary to ensure the requirements of precision, surface treatment and sealing. Through strict quality control and testing, ensure that gas springs can operate stably and reliably in various working environments.