Automatic low temperature alloying process for spring
By precisely controlling the phase in the low-temperature isothermal phase region and forming a gradient metallurgical composite diffusion layer through rare earth microalloying, the problems of high-temperature tempering softening and brittle phase precipitation of the spring clips are solved, achieving hydrogen embrittlement-free, high corrosion resistance and self-healing capability, which is suitable for the automated mass production of railway spring clips.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHENGZHOU ZHONGYUAN LIDA NEW MATERIAL CO LTD
- Filing Date
- 2026-04-29
- Publication Date
- 2026-07-17
AI Technical Summary
Existing powder zinc infiltration technology has problems such as high-temperature tempering softening, brittle phase precipitation, microcrack generation and insufficient self-repair ability in spring clips, making it difficult to achieve automated mass production of spring clips with low-temperature preservation, no hydrogen embrittlement and high corrosion resistance.
By employing precise phase control in the low-temperature isothermal phase region, synergistic doping of multiple metal elements, and rare earth microalloying, a gradient metallurgical composite diffusion layer is formed, including an inner diffusion matrix of the Fe-Zn binary phase system, and rare earth microalloying superimposed on the phase diagram of the Zn-Al-Mg ternary zinc-rich system, forming a continuous gradient metallographic structure. This structure is further enhanced by rare earth atom solid solution, grain boundary segregation, and nano-oxide dispersion, combined with a surface self-healing mechanism.
It achieves zero degradation of the mechanical properties of the elastic clip matrix, no hydrogen embrittlement, high salt spray resistance, and self-healing capability, making it suitable for mass automated production of railway elastic clips and improving the stability and corrosion resistance of the infiltration layer.
Smart Images
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