Method for measuring elliptical deformation of large ring part in high-temperature conditions

The invention discloses a method for measuring the elliptical deformation of a large ring part in high-temperature conditions, and relates to the technical field of metal material heat treatment. According to the method, a measurement diameter (5) is selected on a ring part (4), and a test block A (1) and a test block B (2) are arranged on two ends of the measurement diameter (5) respectively, a light beam is transmitted by a laser distance measuring device, the light beam passes through a through hole in the middle portion of the test block A (1) and reaches one edge of the upper portion of the test block B (2) and the edge of the test block A (1), the measurement distances in the cold state and the high-temperature conditions are recorded separately to obtain the deformation. According to the invention, advantages of simple operation and small measurement error can be realized, and the measurement of the elliptical deformation of the large ring part can be completed even in the high-temperature conditions.