Method for forecasting maximum hardness of hot spray coating

• Main Authors: WANG RUI, YE FUXING, ZHUO YUKUN, DUAN JIAHAO
• Format: Patent
• Language: Chinese; English
• Published: 19.10.2018
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention provides a method for forecasting the maximum hardness of a hot spray coating. The method comprises the steps of selecting powdery particles, wire materials or rod materials as hot sprayraw materials, and forecasting the maximum hardness of the coating by utilizing the hardness of flat particles with the same spray parameter as the coating; observing the microstructures of the coating and the flat particles by adopting an optical microscope and a scanning electron microscope, determining that the surfaces of the flat particles have no microdefects according to the structures ofthe flat particles, and determining the porosity of the surface of the coating according to the structure of the coating; extracting multiple test points on the coating, measuring the hardness by utilizing a microhardness tester and recording hardness values, extracting multiple test points on the flat particles, and measuring the hardness by utilizing a nanoindentation tester and recording hardness values; through compari