Strengthened Ultra-fine Grained Cu-Mg Alloy Contact Network Wire Rod Developed on July 17, 2009

Strengthened ultra-fine grained Cu-Mg alloy contact network wire rod is developed on July 17, 2009. [Photo/sasac.gov.cn]

Strengthened ultra-fine grained Cu-Mg alloy contact network wire rod developed on July 17, 2009

Developed by China Railway Construction Corporation Limited, the strengthened ultra-fine grained copper-magnesium (Cu-Mg) alloy contact network wire rod for high-speed rails was produced on July 17, 2009, which was a significant breakthrough in China's high-speed rail electrification technology.

The wire rod is the "lifeline" of high-speed railways. The industrialization of the strengthened ultra-fine grained Cu-Mg alloy contact network wire rod means that China has mastered a whole set of technologies to independently manufacture such wire rods with complete propriety intellectual property rights.

The technologies have led in solving the problems in the two key technical fields of high-speed wheel rail and pantographs and OCS and have been applied throughout the high-speed rail network in western South Korea.

The second phase of the Soubre 225 kV Transmission Line Project in Côte d'Ivoire completed on July 17, 2016

The second phase of the Soubre 225 kV Transmission Line Project in Côte d'Ivoire was completed on July 17, 2016, marking the completion of the first power grid project by Power Construction Corporation of China (POWERCHINA) in Africa.

The total length of the line is 376 kilometers, and the altitude is 40 meters to 330 meters.

The project included construction of six 225kV lines and one 33kV line, expansion of three substations and renovation of one substation.

The completion of the project greatly improved the thermal power-majored power structure of Côte d'Ivoire and has provided more reliable and clean energy for the local power supply.

World's first "horseshoe-shaped" shield machine comes off assembly line on July 17, 2016

The world's first "horseshoe-shaped" shield machine developed by China Railway Group Limited (CREC) came off the assembly line on July 17, 2016.

Unlike the conventional circular-shaped shield machines, the cutter of the horseshoe-shaped shield machine has an inverted "U" shape, and the excavation section is shaped like a horseshoe.

The horseshoe-shaped shield tunneling method is applied in soft soil tunnels on mountain ridges to maximize the utilization of tunnel space and greatly speed up railway construction.

The production of the shield machine indicated that the special-shaped tunnel boring machine had entered a new stage.

It also signaled that Chinese enterprises have mastered the independent intellectual property rights of the design and construction of the large-sized special-shaped shield machine, and realized autonomous and intelligent production of special-shaped shield equipment in China. 

(Executive editor: Hao Wen)