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 deals with a relationship between strength and coiling temperature ofhigh strength hot-rolled sheet steels consisting of ferrite and nanometer-sized carbides inorder to evaluate the stability of the strength against the variation of the coiling temperature.Ti-Mo-bearing and Ti-bearing steels were prepared to form (Ti,Mo)C and TiC in ferrite matrix,respectively. Ti-Mo-bearing steel exhibited the high strength even under the high temperaturecoiling while the strength of Ti-bearing steel decreased significantly. Ti-bearing steel just aftertransforming at 923K had the same hardness as that at 898K. In addition, hardness ofTi-bearing steel coiled at 898K decreased significantly by holding at 923K for 8.64ks whileTi-Mo-bearing steel did not represent a large change in hardness. These results confirm that(Ti,Mo)C is not coarsened easily by Ostwald ripening at the high coiling temperature unlikeTiC. Consequently the retardation of Ostwald ripening of (Ti,Mo)C is attributed to the smallamount of titanium in solution in Ti-Mo-bearing steel
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.4813.pdf
