| The Compressor is the first channel through which the air gets to the aviation engine. Compressor blades suffer the direct impact of high-pressure and highspeed air as well as corrosive medium. Failure of blades caused by corrosion influences the performance, endurance, reliability, maintenance costs of the aviation engine. In this paper, the effects that various heat treatments have on the tissue and performance of 1Cr16Ni2MoN compressor blade steel are studied. The fractures, second pellets are analyzed. The mass change curves of steel of high temperature oxidation at 900℃, salt deposit and molten salt at 850℃are drawn. The surface and cross-section of corrosion scale, the corrosion products are studied by means of OM, electron balance, SEM/EDS, etc.Mechanical properties of tempering steels meet requirements. The structure of the steel is temper sorbite. The steel after Q.T. aging and tempering has bad ductility, and the structure of the steel is temper martensite and carbides. The fracture surface of the steel has little second pellets. The mechanical properties of the steels, which after 1040℃/1.5h + -70℃/1h + tempering, meet all requirements.The steel after 1040℃/1.5h + tempering showed the best high temperature oxidation resistance at 900℃. The high temperature oxidation resistance of the steel, which after 1040℃/1.5h + -70℃/1h + tempering, has intervenient performance.In NaCl deposit and molten 75%NaCl+25%Na2SO4 at 850℃, the steel which after 1040℃/1.5h + -70℃/1h + tempering shows better hot corrosion resistance than others.All kinds of steel show worse performances in the molten 25% NaCl +75% Na2SO4 at 850℃than those in the molten 75% NaCl + 25%Na2SO4. The scales are loose, and could not protect matrixes. |
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