Abstract
Using different materials to repair mechanical parts in cold state (non-fire repair), the mechanical properties of the repaired materials have different effects. In order to explore the advantages and disadvantages of liquid plastic steel repair agent and epoxy resin repair agent, the repair effects of two cold repair materials were compared. The mechanical properties of L245 pipeline steel before and after repair, such as tensile properties, shear properties and bonding properties, were tested with small size samples. The test results show that the average tensile strength of the reinforced tensile sample of plastic steel is 2MPa higher than that of the ordinary epoxy tree, and the tensile strength is increased by 0.4%; the average yield strength of the reinforced tensile sample of plastic steel is 5Mpa higher than that of the ordinary epoxy tree, and the yield strength is increased by 1.5%. The shear strength of the reinforced tensile specimen of plastic steel is 1.67MPa higher than that of the ordinary epoxy tree reinforced tensile specimen, and the shear strength is increased by 22%.
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