Problems and highlights in the development of China's roller manufacturing indus

At present, the iron and steel industry to capacity, turnaround difficult, the trend of transformation and upgrading of the need to become a benchmark for the roller industry. The roller mill is directly related to the quality of production efficiency and quality of the rolling material and production cost, therefore, how to improve the capability of roller and prolong its service life, to adapt to the needs of the development of modern steel rolling industry, is currently an important topic in roll manufacturing industry." The day before, in Hebei, Shandong and Jiangsu provinces by metallurgical roll (metal) jointly sponsored by the Institute, Shijiazhuang Bohua Exhibition Limited company to undertake the use and manufacturing technology exchange meeting, Chinese Association of equipment management and service center director Zhai Guangquan pointed out that the roller industry.
Look forward to the throes of change
Zhai Guangquan analyzed the development status of China's manufacturing industry roll he pointed out that China's basic roller industry to meet the domestic demand and export overseas steel rolling industry, the annual export volume of nearly 30 thousand tons. However, the main contradiction is still outstanding, low grade products oversupply, manufacturers compete to lower prices, high technology content, high value-added products in short supply, some varieties still rely on imports to supplement. The large roller has a strong economic strength and innovation ability of manufacturing enterprises to further strengthen and expand the enterprise, such as Jiangsu gongchang roll production, China Steel Xing machine and Changzhou InfoCare, Tangshan Lianqiang etc. strong technical strength is still booming, and many small scale, weak technical force roll enterprise has been discontinued or reduced. Roller industry to follow the footsteps of the iron and steel industry, but also the emergence of a stronger, weaker weaker situation. Among them, the most prominent problem is the level of product technology and quality grade roll uneven in quality. Roller manufacturers more than 300, the real supply of roller mill for the modernization of less than 50, to be able to enter the state, such as Baosteel, Shougang, Wuhan Iron and steel of these large steel prices are only about more than and 30. Most of the roller manufacturing enterprises are generally small scale, resource allocation and industrial structure is not reasonable, the comprehensive technical level is low, still using manual work, with mainstream experience and sense mode of operation is still difficult to control the quality of the production site, production process, enterprise development potential problems.
Industry experts believe that China roll manufacturing should continue to survive and develop in the fierce competition, must implement a major change in the "labor pains": one is to continue to introduce or joint use of foreign advanced technology and management experience, make the domestic roller manufacturing technique have qualitative leap in the short term. The two is to adhere to innovation driven, strengthen the roll of new materials, new technology, new equipment R & D investment, according to market demand, the introduction of new products or the use of joint development of school and enterprise cooperation in the development of new varieties. The three is to adhere to the science and technology quality first, to strengthen the control of roll casting process computer, to improve production efficiency, reduce cost; enhance the quality of technical research and to cultivate their own brand, expand the international space, increase export efforts, and strive to create a roll China brand in the world. The four is the need to carry out strategic restructuring and cooperation, the implementation of powerful alliances, and gradually change the status of China's roller manufacturing "small and scattered, more and more chaos," and improve the ability to compete with foreign rolls.
Strengthening and cladding of waste roll
Due to the development of the steel industry, the demand of reducing the efficiency and flexibility of the production is more prominent. Accordingly, the roll remanufacturing and recycling and the use of the old roll in place have become the highlight of the roll manufacturing industry.
According to the Jiangsu Danyang Hengqing composite Mstar Technology Ltd general manager Ding Gang introduced, in order to meet the actual needs of steel rolling production, our country need to spend a lot of foreign exchange import roll, annual imports of high-end roll about 30 thousand tons, consumption of about $200 million in foreign exchange. At present, China's consumption per ton of steel roller 1 kg to 1.2 kg, the annual consumption of all kinds of hot roll a total of more than 900 thousand tons, worth about 15000000000 yuan. Its large consumption, resulting in a huge waste of resources and energy. Therefore, it can not only save a large number of roll materials, reduce resource consumption and environmental pollution, but also save a lot of foreign exchange. Therefore, the development of technology and equipment manufacturing new composite roller has the advantages of simple process, high production efficiency, low equipment investment, in order to achieve high performance and low cost roll production, thus producing a new composite roll has higher performance, is the future development direction of roller technology.
At present, China's annual heat, cold roll and backup roll scrap amount of about 1000000 tons, respectively, about 200000 tons and nearly 200 thousand tons. Such a large amount of scrap from the rolling mill and roller production costs, or from China's energy and resource consumption is a huge waste, but also caused environmental pollution. Waste roll is a kind of precious resource, and it has good economic and social benefits. Therefore, all the countries in the world have carried out the research work on the remanufacturing of waste roll. At present, the development of the main processes are surfacing technology, thermal spraying process, thermal spray welding technology and laser surface cladding process, etc.. Among them, the surfacing is one of the most commonly used techniques in the production of steel roll, the roll repaired by surfacing has the characteristics of low cost, long service life and good effect. But only to repair welding steel roll, and complex process, technical difficulty, high cost, low efficiency, poor working conditions, the residual stress in roll matrix, roller repair is easy to produce cracks, porosity, slag, slag and other quality problems off.
Up to now, there is not a satisfactory technical energy at home and abroad