Improving quality is the top priority of China's s

2022-08-14
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Improving quality is the top priority of China's steel industry during the 12th Five Year Plan

improving quality is the top priority of China's steel industry during the 12th Five Year Plan

China Construction machinery information

Guide: Guide: in recent years, China's high-speed railway has developed rapidly, and the speed of EMUs has reached the international advanced level, but domestic wheels can't keep up with the speed increase requirements. So far, all of them have been imported from Japan and Germany. The design of large aircraft developed in China is very advanced, saving 15% fuel, which has attracted the attention of the world and has begun to order in batches, but flying

Guide: in recent years, China's high-speed railway has developed rapidly, and the speed of EMUs has reached the international advanced level, but the functional characteristics of domestic wheels: they can't keep up with the speed increase requirements, so far they are all imported from Japan and Germany. The design of "large aircraft" developed in China is very advanced, saving 15% fuel, which has attracted the attention of the world and has begun to order in batches. However, aircraft engines, landing gears, hydraulic pipes and other parts related to steel materials are now all imported. Many facts show that the problems of low strength and poor performance of China's steel products need to be solved urgently

reality: the situation of improving quality is urgent

Liu Haimin is the deputy director of China Metallurgical Industry Economic Development Research Center, and his other identity is a member of the expert group of China Metallurgical chamber of Commerce. As a member of the iron and steel industry, he has long studied China's iron and steel industry and followed the pace of the world's iron and steel enterprises, so that Liu Haimin has a clearer understanding of the important role of China's iron and steel industry in promoting the production of lightweight new energy vehicles and special parts

the central "12th Five Year Plan" suggests that in the future, we should focus on the development of advanced equipment manufacturing industry, adjust and optimize the raw material industry, and promote the manufacturing industry from large to strong; We should cultivate and develop strategic emerging industries, including high-end equipment manufacturing, and basically build fast railways and highways

"with the rapid upgrading and development of these industries, the requirements for the steel industry are no longer the output or variety, but the quality and performance. The key for countries such as Germany, Japan and the United States to become powerful and powerful countries in the advanced equipment manufacturing industry is that they have a solid foundation for producing high-quality steel. However, the quality of steel in China obviously cannot keep up with the development of the modern industrial system." Liu Haimin told the China economic times a few days ago. He believes that improving steel quality is the top priority of China's steel industry during the 12th Five Year Plan

in recent years, China's high-speed railway has developed rapidly. The speed of multiple units has reached the international advanced level, which is equivalent to the takeoff speed of aircraft. It is required that the wheels must be free of defects and "contingency" is not allowed. However, the wheels made in China can't keep up with the speed-up requirements of high-speed rail. So far, they are all imported from Japan and Germany

according to the introduction, at present, the wheel of a multiple unit is more than 300 kg, and the import price is as high as 60000 yuan, 200000 yuan per ton based on tonnage, 15 times higher than domestic ordinary wheels. The high-strength and high toughness steel plate for the car box of multiple units has not been developed, and the vehicle manufacturer can't wait, so it has to use aluminum alloy plate instead, which is very expensive

the design of "large aircraft" developed in China is very advanced. The model is optimized according to the principle of dynamics, saving 15% fuel, which has attracted the attention of the world and has begun to order in batches. Then gradually turn down the oil delivery valve, but the aircraft engine, landing gear, hydraulic pipe and other parts related to steel materials are now all imported

although the speed of gears and bearings for wind turbines is not high and they are not "high, fine and sharp" products, they operate at an altitude of more than 80 meters in deserts, plateaus or sea areas and are difficult to repair. Breaking a small part is equivalent to scrapping the whole unit. Therefore, the steel quality of wind power equipment must be 100% stable and uniform to ensure that it will not be repaired for 20 years. However, the quality of domestic steel is unstable, and users dare not adopt it, which basically depends on imports

China's gear steel, bearing steel and die steel are generally low-grade surplus and high-grade imports. The service life of domestic steel products is only 1/2-1/3 of that of imported goods. According to the statistics of the machinery industry, the annual consumption of imported high-end gears across the country is about 5billion US dollars, equivalent to one third of the sales revenue of the gear industry

railway bridges in China have developed towards the direction of long-span, light structure, corrosion resistance and long-life, but the traditional low alloy bridge slabs can no longer meet the requirements of modern bridge construction

building steel bars are the most used steel products in China. The use of low-grade steel bars will cause crushing collapse of houses in case of an earthquake. In the last century, 1.2 million people died in the world due to earthquakes, of which 600000 died in China. In the past two years, 70000 people died in the Wenchuan M8 earthquake, 700 in Chile M8.8 earthquake, and zero in New Zealand M7.2 earthquake. Liuhaimin believes that this is directly related to the quality of steel

it is reported that Japan, Germany and other countries have already eliminated 335mpa low-grade reinforcement and adopted high-grade reinforcement with strength above 500MPa and 600MPa. At present, the reinforcement of 335mpa and below with low strength and poor performance still accounts for two-thirds in China. Many facts show that the problems of low strength and poor performance of China's steel products need to be solved urgently, and the situation of improving steel quality is urgent

front open hydraulic fixture problem: it needs the government and enterprises to solve it together.

Liu Haimin said that after the development of the "Eleventh Five Year Plan", China's iron and steel industry has increased its proportion in the world's steel output from 31% to 45%, and has become a veritable iron and steel country. However, a series of problems still exist in China's iron and steel industry, which are mainly overcapacity, low product quality, poor resource guarantee, lagging environmental protection and low efficiency

steel is an irreplaceable high-energy consumption product. In recent years, China's steel industry has achieved remarkable results in energy conservation and emission reduction. The comprehensive energy consumption per ton of steel has been reduced to 620 kilograms of standard coal, with an average annual decline of about 1%. Although there is still potential, the space is getting smaller and smaller

Liu Haimin believes that the biggest energy-saving potential of China's steel industry is not in the steel production process, but in improving steel quality and reducing steel consumption. This is because the quality and performance of steel in our country are generally low. In order to ensure the service performance, users have to replace fine with coarse, thin with thick, and small with large, which wastes a lot of steel. Consuming more steel means consuming more energy. At the same time, using more steel increases the weight of vehicles and ships, and continues to increase energy consumption in operation

taking automobiles as an example, the proportion of high-quality and high-strength steel used in passenger cars in China accounts for only 21%, which is higher than the international average level? 40%—50%? Twice as low, one to three times lower than the advanced level in Europe (47% - 80%). Due to the use of steel, the self weight of domestic passenger cars is more than 10% higher than that of European and Japanese cars, with an average fuel consumption of 8.13 liters per 100 kilometers, 23.2% higher than that of Europe (6.6 liters) and 37.8% higher than that of Japan (5.9 liters). China's shipbuilding industry is similar, with an average steel consumption of 300 kg per deadweight ton, 36% higher than Japan's average steel consumption (220 kg). Also increase the running fuel consumption

he believes that there is also a huge potential for material and energy conservation in the construction field. If medium and high-grade steel bars are used to replace low-grade steel bars, steel can be saved by 14% - 20%; Using high-strength steel instead of ordinary steel for scaffold can save 30% - 50% of steel; Replacing ordinary steel with high-strength steel for transmission towers can save more than 10% of steel

Liu Haimin said that the effect of energy conservation and emission reduction brought by improving quality and performance and reducing steel consumption is far greater than the potential in the process of steel production

according to preliminary calculations, it is entirely possible to reduce China's consumption of more than 600 million tons of steel by 100 million tons last year. If this goal is achieved, at least 62million tons of standard coal can be saved in steel production alone, and more than 160 million tons of carbon dioxide can be reduced. At the same time, the iron and steel industry will reduce material transportation by 600-700 million tons, and vehicles and ships and other means of transportation will reduce weight due to the use of high-strength steel, thereby reducing fuel consumption, which can greatly reduce energy consumption and reduce pollution emissions. In addition, reducing 100 million tons of steel can also reduce the consumption of iron ore by more than 150 million tons, equivalent to a quarter of the imported ore last year, which can greatly alleviate the plight of imported ore in the steel industry

"to comprehensively improve the quality of steel, the government and enterprises need to perform their respective duties and work together." Liu Haimin suggested that the departments in charge of the steel industry, the national standards administration department, the quality supervision department and the construction management department of the State Council should organize the formulation, revision and cleaning up of steel regulations and design specifications as soon as possible, and comprehensively improve the steel standards. It is necessary to establish a supervision and punishment system for the production, circulation and use of steel, just like the supervision of food quality. Losses caused by steel quality problems shall be investigated jointly and severally according to law

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