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Structure and Properties of 1Cr16Ni2MoN Steel

Author: ZhuXiaoGuang
Tutor: YangShiWei
School: Harbin Engineering University
Course: Materials Processing Engineering
Keywords: Stainless steel Heat Treatment System High-temperature oxidation Corrosion
CLC: TG142.1
Type: Master's thesis
Year: 2006
Downloads: 198
Quote: 4
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Abstract


The compressor is the primary channel of the air flowing through the engine , the leaves directly affected by the impact of the high-pressure high-speed air and aggressive media . The compressor blade corrosion failure, greatly affect engine performance , longevity , reliability and maintenance costs . This paper studies the impact of the organization and performance of different heat treatment systems for aero-engine compressor blades the material 1Cr16Ni2MoN steel by OM, electronic analytical balance , SEM / EDS analysis by means of steel fracture morphology of the second phase morphology , composition, testing steel in high temperature oxidation, the salt film and the molten salt under the conditions of mass change curve, after etching the surface and the cross - sectional morphology, corrosion products . Are to meet the requirements of the mechanical properties directly tempered steel microstructure is tempered sorbite ; , solid solution , quenched and tempered steel after tempering toughness after 1040 ℃ / 1.5h -70 ℃ / 1h the mechanical properties of tempered steel to meet the requirements , microstructure few martensite tempering organizations and carbide fracture second phase . 1040 ℃ / 1.5h tempered steel high temperature oxidation resistance of the best oxide film is relatively dense and 1040 ° C / 1.5h -70 ° C / 1h tempered steel of high temperature oxidation resistance between several the middle of the heat treatment system . The the salt membrane with 75% NaCl 25 % Na in 2 < / sub> the SO 4 < / sub> ( wt % ) molten salt two conditions , the heat treatment system for 1040 ℃ / 1.5h -70 ℃ / 1h tempered steel having relatively good corrosion resistance . In 25% NaCl 75% Na 2 SO 4 (wt%) in molten salt conditions , several specimen of the corrosion resistance are not as good as in the 75% NaCl 25% Na 2 SO 4 ( wt %) and corrosion resistance in the molten salt under the conditions of corrosion products loose , can not play a good protection .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Metallic materials > Steel > Microstructure and properties of steel
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