In the May of 2012, the first piece of our company self-developed high-effective wide and thick plate blank product successfully finished the whole process of production, which marks our company has already basically had the ability to produce high-effective wide and thick plate blanks in batch. At present, our company has gained classification societies from eight countries including German, American, British, French and etc., ASME Nuclear class MO certificate and Military second grade confidential qualification certification, the success development of wide and thick plate blank will play important role in promoting the market share for marine and nuclear-power products, promoting our products entering into the market of military product, also will lay the foundation to promptly realize the industrialization of the products which are researched and developed following-up wide and thick plate blank. Now as following we will introduce the application area of the high-effective wide and thick plate blank, the leading advantages of our company in manufacturing the wide and thick plate blanks and the developing situation of the series products:
1.The application area of the high-effective wide and thick plate blank
The application of the high-effective wide and thick plate blank is wide, mainly used for steel plates in ships, submarine, tank, oil drilling platform, nuclear power, high pressure boiler, pressure vessel, hydrogenation reactor, electric power generation by water and fire, petrifaction, heavy equipment, large diameter oil-gas pipe line, which plays an increasingly important role in National Defense construction and economic development. Along with the improvement of our country’s comprehensive national strength, the market of the wide and thick plate will become more wider.
2.The leading advantages to manufacture wide and thick plate blank in our company
1.Product standard fills the domestic gaps
Before our company’s first piece of wide and thick plate blank finished, in China the widest plate just is 400mm, and the mechanical property difficultly to be guaranteed. The first piece of our company’s wide and thick plate is 3800mm in length, 2500mm in width, 800mm in thickness, at present we can manufacture the plates with the thickness up to 1000mm and above, meanwhile we can guarantee the mechanical properties to meet standard requirements, which fills the domestic gaps.
2.The innovation in technologies for smelting, pouring and solidification
Our company uses electric arc furnace to melt steel, uses vacuum-degassing and refining procedure to control steel composition. We use water cooling mold-casting method to perform pouring and control the composition of steel ingots, which overcomes the problems such as in the manufacturing process wide and thick plate blank easily occurring center porosity and segregation in the casting blank center during steel liquid solidification process. Through innovation of smelting, pouring, solidification technology, it makes the wide and thick plate blank to have the merits such as quick cooling speed, dense construction, little segregation, which greatly promoted and improved the quality level of metal material domestically.
3.The development and market prospect of our company’s follow-up series products of the wide and thick plate blank
The successful development of wide and thick plate blank provides a platform and creates conditions for developing new product. Relying on successful development of wide and thick plate blank. The main products and market prospect which has now successfully been developed or been developing are as below:
1.Rack steel used for marine oil drilling platform
Rack is the main component parts in the marine oil drilling platform, which bears the responsibility of the lifting work for whole platform, so the quality of the rack steel, the machining accuracy and welding are very important. Currently the rack steel plate used in domestic are all imported rolled steel plate, the costs are quite high. Our company rack steel uses forging instead of rolling to manufacture, use large open die forging press to forge wide and thick plate blank. Length 8900mm, width 2200mm, thickness 177.8mm, weight 27 tons, company tested mechanical properties which meet requirements. Our company has submitted application to China's State Intellectual Property Office for patent right on the rack steel manufacturing method, and will soon organize appraisal for state Science and technology. The successful development for the rack steel will break the situation that foreign manufacturers monopolized the rack of our country which are used in oil drilling platform, after batch manufacturing, it is estimated to increase 300-500 million sales incomes for our company every year.
2.Mold steel
Mold steel is used for machining molds, it is mostly used in mold materials. As per purposes it is generally divided into cold mold steel, hot mold steel and plastic mold steel. At present, parts of our company’s high-end mold steel has been developed successfully, and small lot of them have been put into market, we have supplied products for customers. The wide use of mod steel indicates its market prospect is quite extensive, after batch production, it is estimated to increase 200-300 million sales incomes for our company annually.
3.Shell-ring of Petrochemical pressure vessels
At present, the shell-rings of Petrochemical pressure vessels in the market are fully made by welding. Our company is developing the wholly manufacturing process for shell-rings of the petrochemical pressure vessel and high-effective special equipment. This product has good quality, high property, long use life. If developing successfully it can take instead of current welded shell-rings, the market prospect is excellent. At present, our company makes use of current technology and equipment and has realized small batch of shell-ring trial produce, when high-effective special equipment put into production, it is estimated to increase 400-500 million sales incomes for our company annually.
4.Plates used in shipbuilding
The developing trend of the world ship-building industry is shipping over 1 million tons fully used large section ship-building technique, used large size steel plate as main construction material, in order to reduce welding space and to shorten making period. Warship such as battle ship and cruiser all need to install large areas of armor plates, so need quantity of wide and thick steel plates. Take aircraft carrier for example , flight deck should not only bear large impact force which made by warplane during taking-off or landing and flame firing, but also should has enough bulletproof ability. Only the special wide and thick steel plates can meet the requirements, it will need more than ten thousands tons of special wide and thick steel plate just to build flight deck. Our country marine military strength promoting continuously, which will take a large market for the use of wide and thick plate, after batch production, it is estimated to increase 400-500 million sales incomes for our company annually.
5.Steel-made containment used in nuclear power station
Cylindrical steel-made containment is the important barrier to protect reactor, the diameter is about 40 m, height is 60m, outer layer pouring 1m thick steel reinforced concrete, which requires to bear earthquake, typhoon, falling and other various impacting even missile attack. The inner layer of the containment is fully steel lining, using numerous wide and thick steel plates to weld into large steel ring then assembly together, the steel inner lining total weights over 5000 tons. By our company nuclear power certification moving forward and the market of nuclear power products continuously expanding, after batch production, it is estimated to increase no less than 600 million sales incomes for our company annually.