The kinds of pain

　　An obvious example is the carrier of steel, it has become the hearts of many countries.
　　April 2006, India to build its own aircraft carrier, spend high-priced imports from Russia 456 tons of special steel, and the construction of an aircraft carrier, about 20,000 tons of steel.
　　So far, only four countries worldwide manufacturing steel for aircraft carrier manufacturing. U.S. HY-100, two models of the HY-80 steel, steel manufacturing aircraft carrier.
　　Currently, China's steel output in the first in the world, but the specialty steel is heavily dependent on imports. The former president of the Chinese Academy of Engineering Xu said that China's equipment manufacturing industry, mainly in the core technology and core components to be controlled by others. The core technology mainly refers to the control system and software, the core component of the material, but off. Anti-fatigue especially aircraft landing gear, high-speed train axles, bearings and other high-strength steel, nuclear power plants with high temperature resistant, anti-radiation heat-resistant stainless steel pipes, gas turbine, turbofan engine blades and other high-temperature alloy materials, still can not realize the localization.
　　"We want to build aircraft carriers, and then took out a $ 40 million to the shipyard, roads built dock cover Kobo, just, etc. These infrastructure Did too, only to find that we have not made aircraft carrier with steel." Military experts Zhang Zhaozhong these words, tells a hint of frustration in our open arms to greet the aircraft carrier.
　　"Varyag" from Ukraine arrived in Dalian has been stored for three to four years, the steel used is because China did not fix the aircraft carrier.
　　During the APEC meeting held in 2003, a Deputy Director of the Dalian Public Security Bureau has revealed that the "Varyag" arrived in China before, has more than ten years no rust treatment, examination revealed Chinese personnel, " Varyag "was used in steel, can naturally resist seawater corrosion.
　　More people gasp in admiration of warships in order to prevent magnetic mines or magnetic detected, are generally non-magnetic. But the Earth itself with the magnetic field, the warships after several years of sailing degaussing, but "Varyag" physical "in China, the magnetic force is still zero.
　　The military expert, who asked not to be named, said the aircraft carrier plates and welding technology is our urgent need to solve the issue.
　　Shell steel plate of the aircraft carrier, under enormous pressure and corrosion in the water, and the aircraft carrier deck needs to withstand the huge impact of the aircraft taking off and landing as well as gas erosion, explosion and impact is extremely complex service environment, the intensity level and the thickness is much higher than the general hull structure steel. At that time, China also can not afford to produce steel deck block cable.