The Model of Ultrasonic Superficial Plastic Deformation

Scientific substantiation and practical confirmation of possibility, expediency and efficiency of application of the ultrasonic superficial plastic deformation in zones of welded connections after performance of welding works is given. For this purpose a mathematical model of process of superficial plastic deformation is represent, as the hypercycle of loading consisting of elementary cycles – of blows. Is described a method of operative control of processing with use of the standard measurement devices. The technology is intended for use during the manufacturing and repair of any metal walls in places of dimensional and structural nonuniformity such as mechanical defects or a local thinning of a surface owing to corrosion and the microcracks which under the influence of the external forces become zones of concentration of mechanical tension. Hardening in such places of walls of the pipes and tanks working under pressure and having operational loadings in the form of tangential mechanical tensions which is described by a boiler formula or its special cases is effective for pipelines of an oil and gas, water supply systems and also for caissons and tanks of other appointment. The scope of technology can include the repair of sea and river vessels and also of floating objects of oil production. The technology can be applied to improvement of operational characteristics of details of mechanical engineering and transport, objects of energetic and construction: surfaces of a rolling motion and sliding of machines and devices, wheels of a rolling stock of railway transport, a metalwork of support of power lines, platforms and bridges for the purpose of increases in resistance of fatigue at cyclic loadings, wear resistance and corrosion. Keywords––impactive superficial plastic deformation – a peening, the tension-deformed conditions, ultrasonic impaction tool, ultrasonic peening, welding connection, welding seam.