太阳能光热发电用347H耐热不锈钢板材的研制

Development of 347H Heat Resistant Stainless Steel Plate for Solar Thermal Power Generation

阐述了鞍钢股份有限公司生产的成品厚度10~36 mm的太阳能光热发电高温熔盐储罐用347H奥氏体耐热不锈钢板的研制过程。通过选择合理的化学成分、冶炼、加热、轧制以及固溶热处理工艺等手段,生产的347H奥氏体耐热不锈钢,化学成分、热处理制度及力学性能满足GB/T 4238—2015《耐热钢钢板和钢带》的要求;表面质量光洁、无缺陷,钝化膜均匀致密;耐晶间腐蚀及耐氯离子腐蚀性能良好,钢板综合腐蚀性能满足高温熔盐储罐的服役要求。347H奥氏体耐热不锈钢作为新一代绿色能源材料,它的成功研制,在降低光热发电成本、提高光热发电装置寿命以及实现装置国产化等方面具有重要意义,为我国实现绿色发电提供重要途径。

The development process of 10-36 mm 347H austenitic heat resistant stainless steel plate for high temperature molten salt tank in solar thermal power generation by Ansteel were described. By choosing reasonable chemical composition,optimizing smelting process, heating, rolling,solution heat treatment process and so on, the chemical composition, heat treatment system and the mechanical properties of the steel plate meet the requirements of heat-resisting steel plate,sheet and strip(GB/T 4238—2015);the surface quality was bright and clean without defects, and the passivation film was uniform and dense;the performance of intergranular corrosion resistance and chloride ion corrosion resistance were good and the comprehensive corrosion performance of the steel plate meet the service requirements of high temperature molten salt storage tank. As a new generation of green energy material, the successful development of 347H austenitic heat resistant stainless steel is of great significance in reducing the cost of photothermal power generation, increasing the life of photothermal power generation equipment, and realizing the localization of equipment, which can provide an important way for China to realize green power generation.