Source: Hebei News Network
On July 7, the State Intellectual Property Office issued the “Decision of the State Intellectual Property Office on the 22nd China Patent Awards”.
There were 34 awards for the railway industry. A Q345qDNH weathering steel welding applied to bridge construction proposed by China Railway Shanhaiguan Bridge Group won the China Patent Gold Award.
It is a welding method of Q345qDNH weathering steel for bridges with excellent mechanical properties, good weather resistance and high welding efficiency. It fills the welding technology gap in the weathering steel bridges in China, which is a major technological breakthrough in the infrastructure bridge construction, ensuring the green, environmental protection, health and safety of China’s transportation infrastructure. It is of great significance to the development of China’s bridge manufacturing.
As an important high-performance bridge steel, weather-resistant bridge steel has been widely used in the United States, Canada, and Japan, but not in China.
It is Old-fashioned producing technology, structural designs and welding technology restricted the application of the weathering steel in bridges .
Since 2010, with the improvement of the steel quality used in bridges and the development of steel bridge manufacturing technology in China, people’s awareness of environmental protection has continued to increase, and the building of bridges with weathering steel boomed, and the welding technology of weathering steel in bridges has become a common technical challenge in the field.
After years of continuous research in technology, China Railway Shanhaiguan Bridge Group has broken through technical difficulties. A welding method of Q345qDNH cortent steel used in bridges has been applied to the manufacture of weathering steel structures such as the Beipan River Bridge, the Hong Kong-Zhuhai-Macao Bridge and the Guanting Reservoir Highway Bridge.
The patented overall technology has reached the international leading level, and the total economic benefits are about 4 billion yuan.
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