| 摘要 |
FIELD: technology for researching hardness properties of parts, possible use for non-destructive control over quality of parts, primarily cast carrying parts of railroad train. ^ SUBSTANCE: in accordance to method, several standard parts, in most strained zone of which defects are present with maximal allowed sizes, load is introduced in stepped manner, firstly in resilient and then in resilient-plastic deformation areas while performing acoustic-emission control and measuring of densities of noise energy in zone of placement of defects and computation of their average values at each loading stage. Average value of load reached at maximal bend is determined, then durability is tested and number of cycles left till destruction is determined with trust probability alpha and load, exceeding durability limit of base parts. Static loading of controlled parts is performed analogically to standard parts with determining of densities of noises energy in resilient and resilient-plastic deformation areas, and also static durability, and under given conditions, fatigue parameter of usability of parts is computed. ^ EFFECT: increased efficiency of non-destructive control and trustworthiness when determining carrying capacity of parts during manufacturing and maintenance. |
