China's nuclear power equipment steel broke the monopoly of foreign technology
On January 5, Zhejiang Weisheng Holding Co., Ltd. got the tenth Zhejiang Province-level Industrial New Product Certificate by virtue of the independently developed 18MnNiMo steel for nuclear power equipment. In just five years, it achieved such fruitful results. Where are the secrets of their success? ?
At the end of last year, 18MnNi-Mo for provincial nuclear power equipment passed the provincial appraisal of new products, and 18MnNiMo was the first domestic special grade steel for nuclear power equipment steel. Wei Sheng Holdings has declared the invention patent for the product and its preparation method. Fang Ji Jiang, chairman of the company, said that 18MnNiMo nuclear power equipment steel users rated high, the market outlook is good, in line with China's "second Five-Year" economic restructuring requirements, comply with the requirements of the times.
Technical level of product performance up to international advanced
It is reported that the project uses a combination of rare earth, metal Ni as a grain refiner, through the grain refinement of steel to improve the strength and toughness of steel; and the use of activated lime, fluorite, iron ore and other substances made of dephosphorization , Sulfur-specific slag, dephosphorization at 1560-1600 ℃, sulfur, reducing sulfur, phosphorus impurity content. Products with accurate and stable composition, fewer inclusions, oxygen, hydrogen content, mechanical properties, microstructure and so on, the performance of products reach the advanced level of similar foreign products, the international advanced level of technology.
Nuclear power equipment steel 18MnNiMo mainly applicable to the major domestic nuclear power plant pressure vessel barrel, water supply tube, manhole seat, manhole cover and other components. Due to the special environment in which nuclear power steel operates, it is required not only to have good strength and toughness match, but more importantly, to withstand long-term radiation and diffusion of neutron, so the material of choice in the design process is exactly one piece Extremely complex and especially important work, such as improper material selection will have serious consequences. These steel materials put forward very high requirements. Nuclear power equipment steel 18MnNiMo developed using the original production process, the product standard modification using the French RCC-M nuclear power system and technical specifications "PWR nuclear island mechanical equipment design and construction rules," enterprises also prepared internal control standards Q / ZWS007- 2012 "Nuclear 18MnNiMo steel" for the record, and obtain the use of international standards to confirm the certificate (Certificate No. 2012-079D). Production of nuclear power equipment steel 18MnNiMo, the technical indicators have reached the requirements of similar foreign products standards.
Substitute imports to break the monopoly of foreign technology
After the products are used by two aerospace equipment manufacturers such as Guizhou Aerosilicon Casting Co., Ltd. and Shanghai Xinmin Heavy Forging Co., Ltd., the products have good feedback and satisfactory results. The products are of stable quality and can replace imported products. Both companies are tier one nuclear power equipment manufacturers.
In recent years, lack of power resources has become a "bottleneck" restricting China's economic development. Accelerating power construction is imminent. Compared with thermal power and hydropower, nuclear power has great potential and is highly sustainable. Recently, the state restarted the construction of nuclear power plants and increased the investment in nuclear power projects. Weisheng Holding, after thorough market research, conducted research and development on 18MnNiMo steel for nuclear power equipment, which is justified. China's third generation nuclear power project, to achieve independent design, autonomous construction, autonomous operation, equipment localization is particularly important, the successful development of the product for China's nuclear power equipment steel localization, breaking the monopoly of foreign technology, breaking the technical barriers, Import substitution is of great significance.
Provincial technical center is strong
Five years to get ten Zhejiang provincial industrial new product certificate, it is not easy, especially in 2012, the company passed the three provincial-level identification of new products, innovative research and development momentum more and more adequate.
Behind the results, is a strong research team. In recent years, with the expansion of the market and the increasingly fierce competition, the company has continuously increased investment in research and development to enhance its core competitiveness. The company's technology center is now a provincial-level enterprise technology center in Zhejiang Province. The company also set up a material research institute. There are more than 60 R & D personnel in the company, including 2 special allowances granted by the State Council.
In terms of innovations, the company has won 11 provincial-level high-tech (new product) titles and 9 products passed the appraisal of achievements. The company has obtained 8 utility model patent certificates, accepting 2 original invention patents, 4 utility model patents and 3 appearance patents. Enterprises were identified as national high-tech enterprises, the state Torch Program, key new product project commitment units, Zhejiang Province outstanding innovative enterprises, Zhejiang Province science and technology SME.
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