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工业锅炉燃烧喷嘴长期在高温状态(1000～1200℃)下工作,且要经受住混燃煤粉的气流磨损。70年代以来,国内外均用不锈钢焊接喷嘴,使用寿命低。如在火力发电厂锅炉用的不锈钢焊制的喷嘴,使用不到一个小修就会严重变形、磨损、裂纹而停炉拆换,严重影响火力电厂的发电量和正常发电。为此,山东工业大学和莘县特种钢铁铸造厂研究成功了稀土高铬锰氮1000℃耐热钢、稀土高铬镍锰氮1100℃耐热钢和稀土高铬镍氮1200℃耐热钢。这些钢种有熔铸、可焊、可加工性好,强度高,抗变形,抗氧化,抗混燃煤粉的气流磨损等特点。用于锅炉不
Long-term industrial boiler combustion nozzle at high temperature (1000 ~ 1200 ℃) work, and to withstand mixed airflow pulverized coal wear. Since the 1970s, stainless steel welded nozzles both at home and abroad have low service life. If stainless steel welding nozzles used in boiler of thermal power plant, they will be severely deformed, worn and cracked and will be shut down in less than a minor repair, which will seriously affect the power generation of the power plant and normal power generation. To this end, Shandong University of Technology and Shenxian special steel foundry successful research rare earth high-chromium manganese nitrogen 1000 ℃ heat-resistant steel, rare earth high-chromium nickel manganese nitrogen 1100 ℃ heat-resistant steel and rare earth high-chromium nickel-nitrogen 1200 ℃ heat-resistant steel. These steels are cast, weldable, machinable, high strength, anti-deformation, anti-oxidation, anti-pulverized coal flow wear and other characteristics. Not for boiler