ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The process known as Tempcore is used to produce high resistance rods by the formationof a surface layer of quenched and tempered martensite that surrounds a core made of ferrite andpearlite. Such a mixed structure is result of processing hot rolled rods through waters headers thatreduce the temperature at the surface below that for the transformation into martensite. Thisstructure is tempered by the heat flowing from the core of the rod, which transforms into ferrite andpearlite while the rod is in the cooling beds. Such processing produces a significant increase in yieldand ultimate tensile strength, while maintaining adequate ductility. The economic advantages of thisprocess are huge in comparison with those that require alloying elements or further metal workingto improve mechanical properties. A series of experimental trials were carried out in a pilot plant inwhich parameters such as reheating temperature, water flow and processing time were varied tostudy their effect on the mechanical properties of carbon steel rods and on the structures formed inthe bars. The study is being complemented by the thermal modelling by the finite element method
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.537-538.533.pdf
Permalink