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Fan Blade Spray Strengthening Methods


HV2100 ~ 2500 0.700.38 of the skeleton, Ni-based materials in the frame being filled, abrasive erosion in the stand,[link widoczny dla zalogowanych], it can withstand high hardness abrasive friction, especially when low-angle erosion when the effect more pronounced. Solid as the hardness of WC particles far beyond the N [60 in the spray coating of hard phase, so the spray coating with WC than Ni60 high wear resistance of sprayed coating sprayed coating NiWC50 NiWC35 wear resistance than the main is N [WC50 spray coating contains high hardness WC, WC granules, carbide and other hard-phase spacing,[link widoczny dla zalogowanych], so that the work surface reduces wear and tear caused by the WC in Figure 2 is the distribution of spray coating. 3 spray process in order to ensure the implementation of the impeller to meet the design requirements and get high-quality spray coating, spray use the following process to strengthen the blade. Thickness of 3.1 spray fan wear under the circumstances and the parts of the site design spray spray coating thickness and thickness dimensions generally in the range of 0.5 ~ 1.5mm. 3.2 Deformation of treatment against the first anti-spray leaf deformation processing, the leaf spray cooling requirements of the basic design drawings arc to reduce the difficulties of variable 4 Li Yugang et al: Spray strengthen fan blades of Art I 97 leaf-shaped modification is too large,[link widoczny dla zalogowanych], the spray coating caused by excessive force by spray coating fracture and spalling. 3.3 Surface Treatment Spray angle grinder parts surface grinding needs. Remove rust and dirt, to reveal \3.4 Spray Preheat: To prevent the spray after cracking due to shrinkage caused by inconsistent and excessive stress. Can make a good lubricant spray coating the substrate, the substrate to be heated to about 350 ℃. Transition powder spray (spray the bottom of powder): contains the NiWC50 5O of WC powder particles, when the WC hard particle in the jet can easily be bounced out, and the material of WC content decreased, and the deposit base at Kam 2wc store in spray coating distribution rate is very low, in the early 0.2ram Sheng thickness, deposition rate of only 4O. Powder used as a transition layer of powder Ni60 first about evenly sprayed with 0,15 ram, the deposition rate can be doubled, when the go down to the pool in Ni60 spray coating spray NiWC50 powders, WC particles into the spray coating mostly, very few bounced off. Powder spray NiWC50: gun down, starting with the gun I: l 6 ~ Tmm away from the surface between the distance from one end of the workpiece on the workpiece at the outer edge of 20ram heating, when heated to melt the surface when the transition layer began sending powder . At this point in the bath powder, the powder deposition rate can exceed 85 when the workpiece temperature, the gun away from the workpiece can be followed to increase the distance between + this \, the twelve-step method of combining,[link widoczny dla zalogowanych], we call the \This method can overcome the \Slow cooling: End of the leaves should be sprayed into the furnace at any time, the temperature 300 ~ C ~ right, slow cooling with the furnace, or spray off with a stone on the site of cotton cover, reduce the cooling rate appears excessive solder layer crack tendency. Spray leaves 3.5 Weld strengthened through the spray plate and cover with the whole welded together to form the impeller. Also at the weld site of serious wear and tear, so the spray should also strengthen the weld. Narrow due to weld, use \4. Spray application results using the above process indicators impeller design in full compliance with the requirements before spraying can increase life expectancy than 2 to 5 times. Spray the wheel for the TISCO not spray more than triple the life of the impeller. Baosteel spray of the impeller to ensure the maintenance of non-stop for three years, to reach and catch up with the design standards of the Japanese import models for the spray of the impeller Weihe Power Plant, the year after the operation. Spray parts only wear 0.5ram,[link widoczny dla zalogowanych], but have not been sprayed over the leaves of the local 8ram thick steel blade can be seen worn out its useful life after the spray can be greatly enhanced by 5 Conclusion (1) NiWC50 self-fluxing powder with Taiwan really excellent anti-erosion properties. (2) fan blades work in this paper is Qi spray, its impeller of the performance indicators to meet the design requirements, do not fix life can be increased by 2 to 5 times. Is an effective way to strengthen fan blades
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