Study On Arc Spraying Technology And The Performance Of Spray Coat

Some large-size shaft are not breaking normally because of bear greater impact load and circulating stress and often occur the form that damages and damages , and are that surface becomes invalid , as wear or exhausted point lose etc, . Since the cost of large-size shaft is compared normally high, this makes restore to have higher economic value and practicality.This paper the for large-size shaft become invalid to go on analysis, pass for Shao Yang the investigation on-the-spot of the positive city factory of water dynamo, for the main power transmission shaft of water turbine damage condition study and analysis , discover its major invalid form is abrasion. And it is restored that this kind of wear invalid form suits fairly to use spray way.After restoring the characteristic of way through comparing existing various differences, determine to restore scheme with the spray of electric arc. It is studied that on the foundation that the analysis spray technology of electric arc affects for coat quality, the spray of electric arc for the of large scale axle restores technology and has gone on , and for the spray technology of electric arc, parameter has carried out optimization. Choose the spray technology parameter of electric arc of optimization is: The arc voltage is 36V~38V, the current of electric arc reduces for 180~200A, the stress of air is 0. 3~0. 4Mpa, the spraying distance is 150 mm.This paper tests research for the performance of spray coat , is for the preparation of ICr13, 3Cr13 and T8 coat material , combines strength under optimization technology condition for coat, hardness and the union intensity of coat , endure to lose sex and have carried out corresponding experiment, and analysis research , study to show: the 3Crl3 coating has extremely high wear resistance and corrosion resistance. It is the most suitable material to repair shaft and strengthen the surface. When repairing we should select it firstly. The wear resistance and corrosion resistance of ICr13 is also good, we can use it in repairing the shaft which is not highly demanded. The T8 coating has the worst property of wear resistance, it corrodes much more easily than 3Crl3 and 1Cr13. We can use it to resume the measurement of shaft.