China’s formerly used the 15,000-ton hydraulic press developed by it to forge a “flare-shaped†cone-shaped cylinder, which is a skillful “hands-onâ€. It is possible to forge the "straight section" and "oblique section" of the third-generation nuclear power evaporator connected to the "meter-shaped" cone cylinder, which is a rare "single skill". A few days ago, China successfully forged the third-generation nuclear power evaporator cone.
From the forging "trumpet shape" to the forging "meter bucket" cone cylinder, it is a leap in high-hard forging technology, which indicates that China has mastered the third-generation nuclear power product key component manufacturing technology and is of great significance for promoting the localization of nuclear power component manufacturing. .
At present, the AP1000 third-generation nuclear power technology of the Westinghouse Company in the United States has obvious advantages such as less welds, better safety and higher operating efficiency than the second-generation nuclear power standards. It is the most advanced and safe commercial nuclear power technology in the world nuclear power market. South Korea’s Doosan Heavy Industries uses third-generation nuclear power technology to manufacture nuclear power equipment.
In November 2007, China undertook two major forgings of pressure vessels and four evaporators of the No. 1 and No. 2 units with high technical difficulty and complex manufacturing in Doosan, Korea. The key components of the third-generation nuclear power products are difficult to manufacture, and they pose new and serious challenges for a person who is determined to achieve the AP1000 localization strategy.
The newly forged AP1000 evaporator cone is like a “meter bucket†of 2 meters high and 4 meters wide. The straight section of the cone end is the biggest technical difficulty in forging. In the past, the traditional forging method was to forge a cylindrical body into a "flare shape", and then rely on a large number of post-processing to reach the technical index of the oblique section and the straight section of the two ends of the cylinder. According to this processing method, nearly 300 tons of steel ingots can be used to ensure the post-processing technical requirements, waste a large amount of molten steel, and increase the manufacturing cost of the cylinder. How to break through the bottleneck of the traditional processing of the cone-shaped cylinder, which is labor-intensive, time-consuming and cost-effective, is of course important for the manufacture of 70% of the cone-shaped cylinder. But more importantly, the localization of key components such as the AP1000 evaporator cone cylinder must require a heavy engineering technician to explore a new forging technology.
Wang Baozhong, president of a heavy black and steel casting and forging steel company, led the technicians of a heavy metallurgical research institute to organize scientific research and research and solve technical difficulties. Together with Tsinghua University, they repeatedly carried out simulation tests on 10,000 tons of hydraulic press technology on the computer, calculated the technical parameters of each "one fire" in the forging process, and invented 11 kinds of auxiliary tools for the forging processing of tons of hydraulic presses.
These 11 kinds of auxiliary tools are like 11 "hands-on". When the 10,000-ton hydraulic press forges a cone-shaped cylinder, it can handle the forgings with ease and precision. It can change the angle and accurately change, greatly improving the forging efficiency and reducing the manufacturing. The cost of the final forged AP1000 tapered cylinder. At present, Yizhong has become the only enterprise in China that can forge the third-generation nuclear power evaporator cone and other components.
The AP1000 key component pressure vessel top cover has higher manufacturing technical standards and is a very difficult to machine forging. It requires no weld seams and must be formed at one time to improve the safety factor. There are 37 types of difficult forgings like this, which are expected to be delivered by 2009. â€
Wu Shengfu, a general manager of the company, stressed that at present, a large-scale large-scale cast-forged steel base and large-scale casting and forging localization technical transformation project has been approved by the National Development and Reform Commission, and the preparatory work has been completed. It is planned to reach production in 2010. After the completion of this technological transformation, the first level of capability will reach the world's extreme manufacturing goal of “7654â€, namely: 700 tons of molten steel, 600 tons of maximum steel ingots, 500 tons of maximum castings, and 400 tons of maximum forgings. At that time, it will have the capacity to produce 150 300~1000MW high, medium and low voltage rotors and generator rotors per year. The annual production capacity of 5 sets of large hydropower units for casting and forging will fundamentally meet the needs of national construction for power station castings and forgings, and have international competition. ability.
From the forging "trumpet shape" to the forging "meter bucket" cone cylinder, it is a leap in high-hard forging technology, which indicates that China has mastered the third-generation nuclear power product key component manufacturing technology and is of great significance for promoting the localization of nuclear power component manufacturing. .
At present, the AP1000 third-generation nuclear power technology of the Westinghouse Company in the United States has obvious advantages such as less welds, better safety and higher operating efficiency than the second-generation nuclear power standards. It is the most advanced and safe commercial nuclear power technology in the world nuclear power market. South Korea’s Doosan Heavy Industries uses third-generation nuclear power technology to manufacture nuclear power equipment.
In November 2007, China undertook two major forgings of pressure vessels and four evaporators of the No. 1 and No. 2 units with high technical difficulty and complex manufacturing in Doosan, Korea. The key components of the third-generation nuclear power products are difficult to manufacture, and they pose new and serious challenges for a person who is determined to achieve the AP1000 localization strategy.
The newly forged AP1000 evaporator cone is like a “meter bucket†of 2 meters high and 4 meters wide. The straight section of the cone end is the biggest technical difficulty in forging. In the past, the traditional forging method was to forge a cylindrical body into a "flare shape", and then rely on a large number of post-processing to reach the technical index of the oblique section and the straight section of the two ends of the cylinder. According to this processing method, nearly 300 tons of steel ingots can be used to ensure the post-processing technical requirements, waste a large amount of molten steel, and increase the manufacturing cost of the cylinder. How to break through the bottleneck of the traditional processing of the cone-shaped cylinder, which is labor-intensive, time-consuming and cost-effective, is of course important for the manufacture of 70% of the cone-shaped cylinder. But more importantly, the localization of key components such as the AP1000 evaporator cone cylinder must require a heavy engineering technician to explore a new forging technology.
Wang Baozhong, president of a heavy black and steel casting and forging steel company, led the technicians of a heavy metallurgical research institute to organize scientific research and research and solve technical difficulties. Together with Tsinghua University, they repeatedly carried out simulation tests on 10,000 tons of hydraulic press technology on the computer, calculated the technical parameters of each "one fire" in the forging process, and invented 11 kinds of auxiliary tools for the forging processing of tons of hydraulic presses.
These 11 kinds of auxiliary tools are like 11 "hands-on". When the 10,000-ton hydraulic press forges a cone-shaped cylinder, it can handle the forgings with ease and precision. It can change the angle and accurately change, greatly improving the forging efficiency and reducing the manufacturing. The cost of the final forged AP1000 tapered cylinder. At present, Yizhong has become the only enterprise in China that can forge the third-generation nuclear power evaporator cone and other components.
The AP1000 key component pressure vessel top cover has higher manufacturing technical standards and is a very difficult to machine forging. It requires no weld seams and must be formed at one time to improve the safety factor. There are 37 types of difficult forgings like this, which are expected to be delivered by 2009. â€
Wu Shengfu, a general manager of the company, stressed that at present, a large-scale large-scale cast-forged steel base and large-scale casting and forging localization technical transformation project has been approved by the National Development and Reform Commission, and the preparatory work has been completed. It is planned to reach production in 2010. After the completion of this technological transformation, the first level of capability will reach the world's extreme manufacturing goal of “7654â€, namely: 700 tons of molten steel, 600 tons of maximum steel ingots, 500 tons of maximum castings, and 400 tons of maximum forgings. At that time, it will have the capacity to produce 150 300~1000MW high, medium and low voltage rotors and generator rotors per year. The annual production capacity of 5 sets of large hydropower units for casting and forging will fundamentally meet the needs of national construction for power station castings and forgings, and have international competition. ability.
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