ESRC wicket gates for hydro-turbine are one of main products of the company, the technologies applied are of intelligent property right. So far, we have successfully supplied 1000 pieces over sound-castings to more than 20 power stations at home and abroad, and the quality of all these products have inspected up to the advance level in the world. The annual production capacity is more than2000 tons. The materials that ESRC Wicket gates for medium-small power station have been used include ZG0Cr13Ni4Mo(ASTM CA-6NM, DIN G-X5CrNi13 4), ZG0Cr13Ni5Mo, ZG0Cr16Ni5Mo, ZG0Cr17Ni4Cu3Nb, ZG20SiMn etc. Wicket gate with max. Weight of 20 tons can be produced.
The company also made a significant contribution to Three Gorges Power Station by supplying with a complete set integrate wicket gates for hydro-turbine, gross weight 13T/picec, max. Diameter 690mm, height 5600mm, being one of a few domestic manufacturers who owned independent intelligent property on their products supplied. All quality criteria of these wicket gates have been tested in full compliance with VGS.
Established in 1957, shenyang research institute of foundry (srif) is the largest state foundry institute in China. Foundry institution of Chinese mechanical engineering society, national foundry standardization technique committee, productive promotion center of foundry industry and supervision and inspection center of molding materials and important castings of machinery industry are attached it.
Srif undertakes research and development of special steel materials (heat-, wear-and corrosion-resistant), foundry CAD, aod refining technology and equipment concerned. For many years the institute has got a series of important achievements of special steel materials, steel casting technology, heat treatment, etc. The new type, high performance stainless steel grades used for power stations have become the main grades in the national hydraulic tubine manufacturing industry. The properties of newly developed high yield strength ratio stainless steel have already reached the advanced level in the world.
The production base of special steel castings, which takes 3, 000 sq. M, is equipped with 1 set of 2 ton medium frequency induction electric furnace, 1set of aod furnace and many modern analysis instruments. Srif has supplied many advanced manufacture technology and premium castings to large hydraulic power stations at home and abroad, such as three-gorge hydraulic power station
The special steel castings are manufactured by utilizing electric-furnace plus aod duplexing technique, which can maintain the ni4 series stainless steel content up to the requirements of commercial applications yet limiting the content of impurity and gas within a minimum level( [p, s] ≤ 0.04%, [n] ≤ 70ppm, , [o] ≤ 40ppm). Thanks to the special heat treatment, the strength, hardness and yield-tensile ratio of castings produced with low carbon lath martensite are greatly enhanced. In recent years, the technology has been successfully applied in manufacturing of flow passages components for hydro-turbine, such as wicket gate, francis crown, francis band, kaplan and francis blade with a wide range of sizes, pelton, kaplan and francis turbine runner etc. The product capacity is 1000 tons per year. Other special steel products include the castings with boron applied in nuclear power station and all components of heat-resistant, corrosion-resistant and wear-resistant materials.
