review: often referred to the economic development of the railway artery. the construction economic zone, economic zone, economic community, railways must play an important role. economic belt of the Silk Road, along the size of the population to nearly 3 billion, old bearing capacity of land transport technology is not sufficient to generate economies of scale of traffic, leading to the decline of the ancient Silk Road. the development of high-speed rail and road technology, greatly lowers the cost of land transportation. the high-speed and heavy haul railway construction is an important underpinning of the economic belt of the Silk Road.

Nowadays, rail transportation is facing the development of high-speed passenger trains, metro cars, light rail vehicles, as well as high speed heavy haul freight cars, the lightweight trains is increasing train speed the preferred conditions. in aluminum alloy has light weight, corrosion resistance and appearance of flatness, easy manufacturing of complicated curved surface, high strength, reduces weight decreasing running resistance, reducing energy consumption, increasing load, so railroad industry has been developing throughout the world. the body, bogies, as important components of the high-speed train, which affect the safety of high-speed trains. with the rapid development of China's high-speed railway, development of car body material is made of ordinary steel materials to stainless steel and aluminum. the material changes, also contributed to the improvement of the processing technology of nature, laser cutting , and falilai DF3015Plus optical fiber laser cutting machine