高速铁路钢轨质量评估

主要对“高速铁路钢轨质量评估”项目的总体情况进行综述，介绍高速铁路钢轨技术以及钢轨质量评估内容、方案、结果等，从钢轨母材及道岔钢轨的质量、钢轨焊接接头的质量、中国钢轨理化性能及标准与高速铁路发达国家的对比、钢轨和焊接接头的使用跟踪、高速铁路钢轨微观组织及伤损机制分析、钢轨生产稳定性评价等方面进行评估。结果表明：中国高速铁路钢轨、焊接接头及道岔轨的质量满足相关标准要求；中国高速铁路用钢轨的标准和质量与国外先进国家处于同一水平，满足了中国高速铁路大规模建设的需求；中国高速铁路钢轨性能优良、质量稳定，钢轨技术安全可靠，可保证高速铁路安全运营。

Quality evaluation of high-speed railway rails

There is an outline of unfolding and conclusion of the project “high-speed rails quality evaluation”set up. An introduction of high-speed rail technologies is given and the contents,schemes,and conclusions of the project are presented.The evaluation items include the quality of the materials of high-speed rails and switch rails,the quality of rail welding joints,the comparison between China and some developed countries on physical and chemical proper-ties and standards of high-speed rails,the tracking of some selected high-speed rails and welding joints in service, micro-structure examination and damage mechanism analysis of high-speed rails,assessment of sustained stability of high-speed rails production.The results show that the quality of Chinese made high-speed rails,welding joints and switch rails meets the relevant standards requirements.Chinese standards and Chinese made rails,which are at the same level with that of the leading countries in high-speed railways,sufficiently satisfy the needs of large-scale con-structions of China’s high-speed railway system.The prime properties,stable quality,and reliable technologies of domestically made rails can guarantee the safe operation of high-speed railways.