School of Materials and Metallurgy
Compilation of Achievements from Wuhan University of Science and Technology
Industrialization/Technical Research of Hydrogen Embrittlement Resistant High Strength Steel
Project Overview:
Introduction to the Technical Project Background
With the implementation of the “dual carbon” strategy, the demand for advanced high-strength steel in industries such as automotive, oil and gas, and hydrogen energy is increasing day by day. For example, high-strength steel is widely used in automobiles to achieve energy savings and emissions reduction, and deep-sea oil and gas extraction urgently requires high-strength pipeline steel. However, high strength is often accompanied by high sensitivity to hydrogen embrittlement, which has become a key bottleneck in the research and application of high-strength steel. There is an urgent need to develop new methods and concepts to explore and develop high-strength steel that can both improve strength and enhance hydrogen embrittlement resistance.
Project Introduction
This project provides a new pathway for the research and manufacturing of hydrogen embrittlement resistant high-strength steel, starting from the intrinsic root causes of hydrogen embrittlement, combined with computational simulation for reverse research and development. It has been successfully applied to the development of hydrogen embrittlement resistant hot-formed steel and hydrogen cracking resistant pipeline steel. The project is based on composite micro-alloying to control multi-scale hydrogen traps and toughening components, achieving a large number of dispersed deep hydrogen traps and interlaced toughening units through precise calculations of multi-component thermodynamics and process control, resulting in steel materials that possess high strength, high toughness, and excellent hydrogen embrittlement resistance. For example, the developed hydrogen cracking resistant X80 grade marine pipeline steel has a hydrogen cracking sensitivity of 0, with mechanical performance indicators reaching: yield strength >575 MPa, tensile strength ≥705 MPa, elongation ≥11.5%, demonstrating significant performance and cost advantages. The developed 2GPa grade hydrogen embrittlement resistant automotive hot-formed steel has a 50% reduction in hydrogen embrittlement sensitivity compared to the currently most widely used 22MnB5 steel, with a 30% increase in strength.
Project Prospects
The hydrogen cracking resistant X80 grade pipeline steel developed by the project addresses the technical challenges of hydrogen cracking in high-strength pipeline steel used in deep-sea oil and gas extraction, and is expected to replace imported products, achieving localization. The 2GPa grade hydrogen embrittlement resistant automotive hot-formed steel developed by the project solves the problems of delayed cracking and insufficient strength in existing products, filling the gap in related domestic products. The promotion of the above achievements has significant engineering implications for the development and utilization of resources and energy, as well as national defense security, and is expected to generate significant economic and social benefits.
Completed by: Zhang ShiqiTechnology Readiness Level: Pilot Test
Cooperation Method: Entrusted Development/Technology Transfer
Contact Information
Technical Service Contact Phone:
Deng Meng 13007135600
Zhang Kai 13237159270
