9Yasuhara E.Effect of Boron on the resistance to seconaary working embrittlement in extra-low-c cold rolled steel sheet[J].ISIJ INT.,1987,34(2):99
10Mizui N.International Symposium Modern LC and ULC Sheet Steels for Cold Forming:Processing and Properties,ed.by Wolfagang Bleck.Aachen,Germany:1998,169-183