6R. k. Ray, JJ. Jonas and Rk. Hook. cold rolling and annealing textures in low carbon and extra low carbon steels[ J] Int. Mater. rev. 1994 (4). 39 : 129 - 172.
7K. Suzuki. International forum for the properties and Application of IF steel: Body weight lightening Technigue.Tokyo, Japan ,2003.
8Sakata k etal, carbon work brittleness of extra low carbon hot rolled steel sheet [ J ] ISIJ INT. 1987.73 (6) :549.
9E. Yasuhara, etal, Effect ~f Boron on the resistance to seconaary working embrittlement in extra - low - c cold roiled steel sheet [J] ISIJ INT. 1987.34(2) : 99.
10Mizui N. International Symposium Modem LC and ULC Sheet Steels for Cold Forming: Processing and Properties, ed. by Wolfagang Bleck. Aachen, Germany 1998:169 N 183.