This paper discusses the major sources of residual stress generation in the steel microstructure during cooling process of as-cast steel (slabs, blooms, and billets). The stress configuration of the steel microstructure changes during quenching due to stresses introduced to the microstructure by these sources. The influence of each source in increasing the stress distribution within the microstructure during quenching is explained via corresponding formula and qualitative discussion in separate sections. The stresses accumulated during cooling may introduce the residual stress concentration zones in the microstructure of the steel.
These stress concentration zones may result in flaws, microcracks or voids formation. Consequently, it may lower the soundness of the steel and cause deviation of the thermo-mechanical properties of the cast steel from the initially designed and customer desired specified properties.

Please login / register to post comments

news in steel

LKAB invests in pilot plants for phosphorus and rare earth metals

"We are investing 45 million kronor in pilot plants as part of a pre feasibility study to define a process that enables recycling of mine waste through innovative processing, producing critical raw materials. Lab tests conducted during the year confirmed that we can produce more phosphorus and rare earth metals than estimated," says President and Group CEO, Jan Moström.

Introducing Duroxite™ 200 overlay plate for preventing severe sliding wear

Duroxite™ 200 saves money and improves productivity in a wide range of applications through higher output and less maintenance.

SMS group supplies high-performance Compact Cold Mill to Marcegaglia

Marcegaglia Ravenna S.p.A. has contracted SMS group for the complete supply of a two-stand reversing cold mill of CCM® (Compact Cold Mill) design. Marcegaglia's head-quarters is located in Gazoldo degli Ippoliti, in the Mantua province in North Italy.

VCC® technology comes to Colombia

Ternium del Atlántico SAS, has placed an order with SMS group for the supply and installation of the VCC® technology (Vertical Compact Coiler) for its bar mill in Palmar de Varela, Barranquilla, Colombia.