Localized heat treatment
C.M.C. Sud, a point of reference at a national and international level in the non-destructive testing sector for over 45 years, carries out localized resistance heat treatments on large pieces and complex geometries. Although heat treatments are not part of non-destructive testing (NDT), it is a complementary service often requested by customers, which consists of subjecting a weld to controlled temperatures for a defined period of time to obtain an improvement in its mechanical and metallurgical properties.
The importance of localized resistance heat treatment on large pieces and complex geometries
Localized heat treatment of welds aims to modify the thermomechanical properties of specific areas without involving the entire component. These treatments reduce residual mechanical stresses and improve metallurgical characteristics, so as to increase resilience, fatigue resistance and corrosion resistance near the welds, reducing the risk of breakages or critical failures. Precision in managing temperatures and heating times is essential to achieve the desired results without compromising the integrity of the surrounding material.
Localized resistance heat treatments are particularly suitable when the items cannot be treated in the oven. With this methodology it is possible to proceed by isolating the area close to the welds and propagating the heat with the aid of electrical resistors placed in contact with the material to be treated. A special instrumental apparatus records the obtained temperatures, in addition to modulating the electric current supplied to the resistors. The company's technicians are able to carry out treatments on different structures in accordance with the regulations applied by customers, thanks to the use of latest generation equipment and tools periodically verified according to AWS, ASTM and ISO standards. Ecological ceramic fiber is used as a refractory material and its disposal follows controlled channels, as per current legislation.
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