超超临界锅炉用新型耐热无缝管C-HRA-5的开发

Development of model heat resisting seamless tube C-HRA-5 for ultra-supercritical power plant boilerand

为了满足630~650℃超超临界电站过热器和再热器锅炉管的要求,太原钢铁(集团)有限公司和钢铁研究总院通过成分设计、冶炼、冷热变形、热处理等技术攻关,突破关键技术瓶颈,采用“电炉+AOD(或VIM+ESR)+径锻+挤压+冷轧”工艺,制备出C-HRA-5不锈钢无缝钢管。产品具有化学成分控制精确、非金属夹杂物体积分数低、钢质洁净、表面质量好、组织均匀、性能优异的特点,其化学成分、晶粒度、微观组织、常温力学性能、高温拉伸性能、高温持久性能等各项性能指标满足ASME SA-213标准的要求,抗蒸汽氧化性能和焊接性能优异,实物质量达到了国际先进水平,获得上海锅炉厂有限公司、东方锅炉厂有限公司、哈尔滨锅炉厂有限公司、上海发电设备成套设计研究院、钢铁研究总院的评定报告,产品取得全国锅炉压力容器标准化技术委员会的评审认证,并牵头制订了相关团体标准,具备批量供货条件,可用于超(超)临界锅炉的过热器、再热器等部件以及类似工况的受压结构件。

In order to meet the requirements of superheater and reheater boilers in 630-650℃ultra-supercritical power plants,The C-HRA-5stainless steel seamless steel pipe was prepared according to the process of"EAF+AOD(or VIM+ESR)+diameter forging+extrusion+cold rolling"through the technical research of composition design,smelting,cold and hot deformation and heat treatment and breaking through the bottleneck of key technology.The products are characterized by precise chemical composition control,low volume percent of non-metallic inclusions,pure steel,good surface quality,uniform structure and excellent performance.Its chemical composition,grain size,micro-structure,mechanical properties at room temperature,high temperature tensile properties,high temperature durability and other performance indicators meet the requirements of ASME SA-213standard,and its steam oxidation resistance and welding performance are excellent.Its physical quality has reached the international advanced level,and has been evaluated by Shanghai Boiler Works,Ltd,Dongfang Boiler Group Co.,Ltd.,Harbin Boiler Co.,Ltd.,Shanghai Power Equipment Research Institute and CISRI.The product has been appraised and certified by the National Technical Committee for Standardization of Boiler and Pressure Vessel,and has taken the lead in formulating relevant group standards.It can be used in superheater,reheater and other parts of ultra(ultra)critical boiler,as well as pressure structure parts under similar conditions.