Study on Surface Strengthening Treatment of New-type Blade Material for Turbine Machinery

In order to compare the strengthening effect of the five kinds of surface treatment strengthening methods, such as bimetallic, nitriding, spraying Al₂O₃, spraying Ni-Al, SERMETEL-W coating, the blade samples of 1Cr11Ni3W2MoVb, 1Cr11Ni2W2MoV and 2Cr13 were treated by the above five strengthening methods respectively.Then, the sand blowing experiment and salt spray experiment were carried out to study the corrosion resistance and erosion resistance of new blade materials of turbine machinery.The results show that the novel blade materials of 1Cr11Ni3W2MoVNb have better erosion resistance and corrosion resistance compared with that of the traditional 2Cr13 and 1Cr11Ni2W2MoV blade materials.The blades treated by new bimetallic strengthening process have the best corrosion resistance and good scour resistance.