Abstract: Carbon fiber reinforced polyetheretherketone (CF/PEEK) is a thermoplastic composite material with excellent properties. CF/PEEK is sensitive to conditions such as temperature and pressure during the molding process, and different heat treatment conditions can have an impact on the deformation of the part. During the curing of composites with curvature, internal stresses between the laminates are released during demolding, which can cause deformation of the material and affect the accuracy and later use of the molded part. Based on the enhancement of the mechanical properties of CF/PEEK by the heat treatment process, this paper focuses on the effect of the heat treatment process on the deformation of CF/PEEK, designs in-situ film heating equipment for the manufacture of curved parts, uses cylindrical molds to process C-shaped parts, explores the effect of different melting temperatures as well as different annealing temperatures on the deformation of the material, finds the optimal process curve and discusses the factors that may affect the deformation at different annealing temperatures. It was found that the spring-back angle of the parts at different melting temperatures ranged from 0.325 7 to 0.473 7, and the deformation of the parts at an annealing temperature of 250 ℃ was the smallest. This study aims toutilize more efficient manufacturing methods, to improve the quality of the molded parts after curing composite materials and help them to be better used in the aerospace field.

Key words: thermoplastic composite, in-situ membrane, heat treatment, deformation, C-shaped