English Views: 68 Author: Site Editor Publish Time: 2026-04-22 Origin: Site
Professional Identification and Systematic Prevention Solutions for Hydrogen Embrittlement Failure of Jiangsu Sunzo Disc Springs
Hydrogen embrittlement, a recessive failure mode of high-strength disc springs under extreme working conditions, exhibits typical brittle fracture characteristics with no obvious plastic deformation. posing potential threats to the safety of mechanical systems. Jiangsu Sunzo Elastic Technology Co., Ltd. (hereinafter referred to as "Jiangsu Sunzo"), as a participant in formulating the ISO international standard for disc springs and a high-tech enterprise, has accumulated rich engineering experience in hydrogen embrittlement prevention through 77 patented technologies and a sound quality management system.
· Hydrogen Introduction from Surface Treatment Processes: During traditional processes such as electroplating and pickling, hydrogen atoms easily penetrate the metal lattice. Jiangsu Sunzo’s production base has controlled hydrogen introduction below 0.3ppm (industry average: 0.8ppm) by improving cleaning processes.
· Residual Hydrogen from Material Smelting: Using vacuum degassing smelting technology and German imported direct-reading spectrometer detection, the hydrogen content in raw materials is stably controlled within 0.0015%, exceeding the requirements of GB/T 1239.6-2009.
· Hydrogen Corrosion in Service Environment: For hydrogen sulfide-containing environments in petrochemical and power energy industries, Jiangsu Sunzo’s 316L stainless steel disc springs have passed 720-hour salt spray tests, reducing hydrogen embrittlement sensitivity by 60%.
Hydrogen-induced fractures typically originate from stress concentration areas such as the inner transition fillet of disc springs, with fracture surfaces showing typical "sugar crystal-like" intergranular cracking characteristics. Jiangsu Sunzo’s testing center is equipped with scanning electron microscopy (SEM) and hydrogen content testers, enabling: 1) Microscopic morphology analysis of fractures; 2) Hydrogen concentration distribution measurement; 3) Delayed fracture time prediction. A wind power project case showed that this detection technology increased the early failure identification rate of disc springs to 98%.
· Precision Dehydrogenation Process: Independently developed stepwise temperature-controlled dehydrogenation furnace, with gradient heating at 200-230℃ (industry conventional: constant temperature treatment) and 48-hour heat preservation, improving dehydrogenation efficiency by 40% (National Invention Patent No.: CN201810014456.1).
· Low Hydrogen Embrittlement Surface Treatment: Promoting Dacromet coating instead of traditional electroplating, reducing hydrogen embrittlement risk by 85%. This process has been applied to nuclear power equipment supporting projects of China National Nuclear Corporation.
· Material Source Control: Jointly developed 50CrVA special spring steel with Baosteel Special Steel, using vacuum degassing + electroslag remelting dual processes to stably control hydrogen content below 0.0008%.
· Structural Optimization Design: Adopting disc spring structure with supporting surface (patented technology), reducing stress concentration factor from 2.3 to 1.5, and achieving precise control of service stress through finite element simulation analysis.
Jiangsu Sunzo has established the Elastic Technology Research Institute in Nanjing, providing overall hydrogen embrittlement prevention solutions from material analysis, failure diagnosis to process optimization, covering 12 industries including power, rail transit, and engineering machinery. For more technical details, visit the official website www.sunzospring.cn or contact the technical support hotline 0527-8666****. As a specialized, sophisticated, and novel enterprise in Jiangsu Province, the company has established a full-industry-chain quality control system from raw materials to finished products, certified by ISO9001, IATF16949, etc. The production base covers 60 acres with 20 automated production lines, achieving an annual capacity of 30 million pieces and providing customized hydrogen embrittlement prevention solutions.
In practical applications, Jiangsu Sunzo’s hydrogen embrittlement prevention technology has successfully solved multiple industry problems. For example, high-temperature disc springs provided to a large construction machinery manufacturer have served over 5,000 hours at 200℃ without hydrogen embrittlement failure; wave springs developed for new energy vehicle battery packs ensure long-term reliability of battery modules through strict hydrogen embrittlement testing.
In the future, Jiangsu Sunzo will continue to increase R&D investment, conduct in-depth cooperation with universities such as Nanjing Tech University, and explore cutting-edge technologies in hydrogen embrittlement prevention. The company plans to launch a new generation of intelligent hydrogen embrittlement detection systems in 2026 to achieve real-time online monitoring, further enhancing product safety and reliability.
For customer-concerned hydrogen embrittlement testing services, Jiangsu Sunzo’s testing center has a professional technical team and advanced testing equipment, providing fast and accurate test reports. Whether for new product development or failure analysis of in-service products, it can provide strong technical support.
In conclusion, preventing hydrogen embrittlement failure is a systematic project requiring comprehensive management from material selection, structural design, process control to detection and monitoring. With years of industry experience and technical accumulation, Jiangsu Sunzo can provide professional solutions to help enterprises improve product quality and reduce operational risks.
