The most popular strategic technological breakthro

2022-08-21
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China has initially achieved strategic technological breakthroughs and industrial breakthroughs in the large castings and forgings industry, with 10-year continuous support, and a cumulative investment of more than 1billion yuan in scientific research. Through ten years of grinding a sword, and with the continuous support of a number of scientific and technological plans, China has systematically overcome a number of key technologies in the manufacturing of large castings and forgings in the fields of nuclear power, hydropower, thermal power, marine diesel engines, etc., and formed a series of major products, Breaking the foreign monopoly

10 years ago, China's machinery manufacturing industry suffered from the dependence on imports of large castings and Forgings: foreign enterprises took the opportunity to raise prices, prices rose again and again, and delivery dates delayed again and again...

now, this passive situation of being controlled by others as a whole has been basically reversed. Recently, the key project of the national science and technology support plan "research and development of key technologies and equipment for large castings and forgings manufacturing" passed the acceptance, which marks that China has initially achieved a strategic technological breakthrough and industrial breakthrough in the large castings and forgings industry

10 years of continuous support, with a cumulative investment of more than 1billion yuan in scientific research. Through ten years of grinding a sword, and with the continuous support of many scientific and technological plans, China has systematically overcome a number of key technologies in the manufacturing of large castings and forgings in the fields of nuclear power, hydropower, thermal power, marine diesel engines and so on, forming a series of major products and breaking foreign monopolies. China's large castings and forgings are marked with more and more "made in China"

the pain of necking: even if you buy drawings, you can't make them.

with the rapid development of energy and power equipment, China's economy has an increasingly urgent demand for large castings and forgings. However, compared with developed countries, China's large castings and forgings have a large gap in product varieties, quality grades, process levels, manufacturing equipment and so on. Many products cannot be produced and are controlled by others

for example, large marine crankshaft is the core component of marine diesel engine, which has been dependent on imports for a long time. "Ships, machines and shafts" has become one of the bottlenecks restricting the rapid development of China's shipbuilding industry. For another example, the key large castings and forgings required by China's nuclear power equipment, especially the castings and forgings of 1000MW nuclear power equipment, have never been produced, and all rely on imports; More than 50% of the large castings and forgings required by 300MW Thermal power units are imported, and 90% of the large castings and forgings required by 600MW thermal power units are imported

insiders said that China's machinery manufacturing industry suffered from "import dependence" on large castings and forgings. Relying on imports has made the development of the whole industry controlled by others: on the one hand, foreign suppliers have full pricing power, and the import price remains high; On the other hand, the construction progress of major projects in China is subject to the delivery date of foreign large castings and forgings

"even though China buys some design drawings of equipment through the introduction of technology and knows the size and composition, we still can't make it, and the core key manufacturing technology can't be bought." Li Dongru, Deputy Secretary General of the China Machinery Industry Federation and director of the science and Technology Department, told Science and technology

the urgent needs of national economic construction and major projects are in great contradiction with the lower elasticity recovery after the elimination of the pressure on China's manufacturing capacity. Industry experts have repeatedly called for joint research and development of special materials and special castings and forgings. Starting from the tenth five year plan, the Ministry of science and technology has made a series of arrangements for the research and development of domestic large castings and forgings in the field of advanced manufacturing by relying on the 863 plan, key research projects and support plans, and organized the national dominant forces to carry out technical research on key technologies and equipment for large castings and forgings manufacturing

comprehensive breakthrough in the production technology of large castings and forgings

it is learned that around the key technology of the development and production of typical large castings and forgings, the science and Technology Department has organized domestic advantageous units to tackle key problems in a planned and step-by-step manner from the three levels of technology breakthrough, product formation and industrial breakthrough. After nearly 10 years of accumulation and research, by the middle and late period of the "Eleventh Five Year Plan", China's production technology of large castings and forgings has made a comprehensive breakthrough, and a number of Representative Key Technologies of large castings and forgings have been overcome, and products have been formed, which are directly applied to China's large-scale engineering construction:

-- for the super large castings and forgings required by large-scale advanced pressurized water reactor nuclear power plants, insulation structural parts for UHVDC converter valves have been developed The demonstration production line of UHV extra large tonnage glass insulators and composite insulators has introduced the manufacturing technology of ap1000rpv key large castings and forgings, which has made China reach the international advanced level in the manufacturing technology of nuclear power forgings, and some forging product indicators exceed those of foreign countries. This breakthrough provides technical storage and equipment preparation for China to design and manufacture cap1400 on the basis of introducing, digesting and absorbing the most advanced third-generation nuclear power AP1000 technology from abroad

the upper display is displacement display

-- for the Three Gorges large hydropower unit, the key castings of the unit have been developed and manufactured, and the product quality has reached or exceeded the level of similar foreign products

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