Mechanical Property of Reworked Part of Locally Corroded Steel Plate Repaired with Laser Cladding Technology

In order to study the mechanical property of reworked coupons of locally corroded steel plate repaired with laser cladding technology, this paper studied the effect law of forms of corrosion, treatment of corrosion interface, corrosion depth, and scanning path of laser cladding on the mechanical property of reworked coupons through uniaxial tensile test. And it obtained the force-displacement curve and mechanical property reduction factors of the locally corroded steel plate and its reworked coupons repaired by laser cladding. The results show that the modulus of elasticity, yield strength and ultimate strength of locally corroded steel plate coupons repaired by laser cladding technology are roughly equivalent to those of intact coupons, and its ultimate elongation can be recovered to more than 70% of that of intact coupons. Soft treatment of cladding layer side-substrate interface or increasing the overlap region can move fracture location from the cladding layer side-substrate interface to the substrate and further enhance the mechanical properties of the repaired coupons. Laser cladding technology can repair steel plates of different depth of corrosion and the mechanical performance of the repaired coupons is not sensitive to the scanning path.