NDLI: Effect of Nb and Ti on Resistance to Cold-work Embrittlement of Extra-low-carbon High Strength Cold-rolled Steel Sheet Containing Phosphorus

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Effect of Nb and Ti on Resistance to Cold-work Embrittlement of Extra-low-carbon High Strength Cold-rolled Steel Sheet Containing Phosphorus

Content Provider	Semantic Scholar
Author	Yamada, Masato Tokunaga, Yoshikuni Yamamoto, Mitsuharu
Copyright Year	1987
Abstract	Synopsis : The present work deals with the resistance to deep drawing-induced brittleness. The materials used in this study are 40•`45 kgf/mm2 grade extra-low-carbon high strength steel sheets containing P and Si as strengthening elements. Though the resistance to the brittleness is improved by B addition in any steel, it is more remarkable in Nb and Ti containing steel than in Nb or Ti containing one. The difference of the effects of B between Nb and Ti containing steel and Nb containing one is attributable to the difference of existing state of B. In Nb and Ti containing steel, B exists as solute atom because N is precipitated as TiN, thus acting to inhibit the segregation of P to grain boundaries. Solute B also enhances the grain boundary strength by itself. On the other hand, solute B content is quite small because a considerable portion of B precipitates as BN in Nb containing steel. The reason why Nb and Ti containing steel is superior to Ti containing steel in resistance to the brittleness is that a small amount of solute C coexists with B only in the former. Solute C also inhibits the segregation of P to grain boundaries and enhances the grain boundary strength.
Starting Page	1049
Ending Page	1056
Page Count	8
File Format	PDF HTM / HTML
DOI	10.2355/tetsutohagane1955.73.8_1049
Volume Number	73
Alternate Webpage(s)	https://www.jstage.jst.go.jp/article/tetsutohagane1955/73/8/73_8_1049/_pdf
Alternate Webpage(s)	https://doi.org/10.2355/tetsutohagane1955.73.8_1049
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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