超临界机组P92钢的研制

Development of P92 steel for Ultra Supercritical generating Unit

P92为马氏体耐热不锈钢,具有高的抗氧化性能和抗高温蒸汽腐蚀性、良好的冲击韧性和持久塑性, P92用于制作超超临界火电机组四大管道用钢,该钢种在生产过程中易出现成分不均,δ-铁素体含量、夹杂物 超标,表面裂纹等缺陷,经过小炉炼钢和生产试制,确定了其最佳电炉冶炼、锻造、热处理工艺,可以生产出优质 的P92管坯,各项技术指标都能达到用户的要求.

P92 is heat resistant martensitic stainless steel, with high oxidation resistance and high - temperature steam corrosion resistance, good impact toughness and durable plastic. P92 is used for four pipeline steel in the production of ultra supercritical thermal power generating units, which is prone to uneven composition, ferrite and inclusion content exceeding the standard, and surface cracks etc. , After small furnace steelmaking and production trial, the best electric furnace smelting, forging, and heat treatment process can be determined, high - quality P92 tube billet can be can produced, and the technical indicators can meet the users requirements.