FMEA QUALITY IMPROVEMENT METHOD OF FLAME SPRAYING THERMAL INSULATION

FMEA is a very popular and effective analysis. The main advantage is the arrangemnet of expert groups, which define risks, their effects and organize corrective and preventive actions. But such analysis also has some disadvantage, first of all it is the uncertainties, the other one is the need to choose the corrective event among those that have been suggested. Besides, a typical model for assessing the risks of potential failures of the coating applied by the method of gas-thermal plasma spraying on the blades of a gas turbine of a gas turbine engine has been developed. The model is based on the Design Failure Mode and Effect Analysis. The structural and functional analysis of the coating design was carried out. The failures resulting from the failure of the coating to perform the function are determined. The potential causes and consequences of failures have been identified. An assessment of the risks of failures was carried out and the priority of actions for their elimination was established. Measures to improve the quality of the coating applied by the method of gas-thermal plasma spraying are described.