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:
This study aims to shorten the softening treatment period as possible in high strength structural steels. The steelused is SCM440 steel. As an initial microstructure, martensite, bainite, pearlite and complicated microstructureconsisting of ultrafine polygonal, martensite and equiaxed cementite were extensively examined to understandtheir softening process on aging at 973K. These initial microstructures were prepared by heat orthermomechanical treatment. Their initial Vickers hardness (Hv(10kgf)) were 634, 281, 219 and 238,respectively. It is noteworthy that within five minutes on aging hardness of the complicated microstructurereached lower than Hv200, while it took more than several hours for other initial microstructures. Aquantitative evaluation of microstructures appears to help in understanding the mechanism of the softeningkinetics
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.4807.pdf
