Study On The Properties Of Erosion And Salt Spray-Erosion Of Martensitic Stainless Steel Often-Used To Compressor

Martensitic stainlcs steel was often used to produce the turbine blades of compressor because of its high strength and fine corrosion resistance. However, due to the impact of service environment and condition in load, the erosion wear and the corrosion-erosion wear of the compressor blades is a prominent phenomenon. Along with the ship power develops unceasingly to the high efficiency and large power, making an investigation on the erosion-corrosion resistance and its wear mechanism of martensitic stainless steel has an important significance to improve the properties, service life and reliability of the compressor blades for engineering application.In this paper, erosion and salt spray + erosion cycle testing of the 1Cr11Ni2W2MoV, 1Cr12Ni2WMoVNb and 1Cr17Ni2 martensitic stainless steel often-used to compressor was carried out on different eroding angles with the solid particle air entrainment eroding testing equipment developed independently. The influences of the amount of quartz sand and the salt spray corrosion on the erosion rate have been investigated under 30°and 90°erosion angle. The resistance to erosion and salt spray+erosion of the three kinds of materials was compared through the amount of quartz sand-erosion rate curves. Erosive mechanism and erosive products have been analyzed with SEM,EDS and XRD. Erosion-Corrosion Resistance PropertyOnly in the action of erosion, the results showed that when amount of quartz sand was in a smaller volume, the erosion resistance of the materials eroded under the 30°erosion angle was decided by the materials hardness and then depended on the flinty particle with the increase in the volume of quartz sand which showed a small-angle plowing erosion mechanism. Under the 90°erosion angle, however, the erosion mainly was depended on the crack formation.During the cyclical test of salt spray and erosion, the erosion-corrosion resistance of the materials both under 30°and under 90°erosion angle was decided by the materials anti-corrosion concerned with the amount of Cr and Nb in the materials,which was also showed a small-angle plowing erosion mechanism.The erosion resistance and the salt spray+erosion resistance of the three kinds of material were shown to be 1Cr17Ni2> 1Cr12Ni2WMoVNb >1Cr11Ni2W2MoV。...