How are E Type Rail Elastic Clips manufactured?

The manufacturing of E-type rail elastic clips is a systematic process that integrates materials engineering with precision forming technology.

The entire production begins with the selection of high-quality spring steel, where the most commonly used 60Si2MnA material undergoes strict spectroscopic analysis to verify its chemical composition, ensuring precise control of carbon content between 0.56%-0.64% and silicon content within 1.60%-2.00%.

The raw material is first cut into billets of specific lengths, then enters medium-frequency induction heating furnaces for uniform preheating, with the temperature precisely controlled between 850-950°C, fully preparing it for the subsequent hot forming process.

The hot forming stage is completed using fully automated production lines. The heated billets are quickly transferred to precision dies, where they undergo hot forging under the action of 800-1000 ton hydraulic presses. During this process, the die's surface design and forming parameters are meticulously calculated to ensure the material's grain flow aligns perfectly with the clip's stress direction, thereby achieving optimal mechanical properties.

The formed clips immediately enter the heat treatment process, starting with quenching in salt bath furnaces at 860-880°C to obtain a hard martensitic structure, followed by transformation into tough and strong tempered troostite in tempering furnaces at 460-500°C.

The surface treatment phase employs fully automated hot-dip galvanizing production lines. The clips sequentially pass through pre-treatment steps including degreasing, pickling, and fluxing before being immersed in a 450°C zinc bath to form an alloy coating with a thickness of no less than 80μm.

The final precision machining stage uses specialized fixtures to precisely calibrate the contact areas of the clips, ensuring a matching degree of over 95% with the rail foot.

Throughout the entire manufacturing process, GNEE RAIL implements strict quality control, with every batch of products required to pass multiple inspections including hardness testing, fatigue life testing, and salt spray corrosion testing, ensuring every E-type clip can perform reliably long-term in demanding railway operating environments.

GNEE RAIL offer an extensive range of rail clips with optimum quality, these rail clips are designed with high precision and made up of premium grade spring steel. GNEE has been the largest and most competitive production base of rail clip in China after more than 18 years' rail clip producing experience, and have qualification to tender nationally large and medium scaled rail projects. What's more, our rail clip can be customized according to clients' requirements.

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