SOFT BLACKPLATES WITH HARDNESS HR30T OF 51±3 FOR TINNING AND PRODUCTION METHOD FOR THE SAME

WIPO Patent Application WO/2007/000108

A1

Soft blackplates with hardness HR30T of 51±3 for tinning comprise (wt.%) up to 0.005 C, 0.20-0.30 Mn, 0.03-0.06 Al, up to 0.03 Si, 0.03-0.06 Ti, up to 0.012 P, up to 0.015 S, up to 0.003 N, up to 0.004 O, and the balance Fe and other inevitable impurities. The method for producing the soft blackplates involves the following steps: steelmaking, continuous casting, hot rolling, combination of pickling and cold tandem rolling, continuous annealing, and temper rolling. The main process parameters in the method are as follows: slab delivering temperature is 1190-1250 deg. C, final rolling temperature is 880 - 920 deg. C, coiling temperature is between 560 deg. C and 620 deg. C, annealing temperature is 730-760 deg. C, holding time is 25-50 seconds, temper elongation is 1.2-2.2%.

LI JUN (CN)
LIN XIUZHEN (CN)
ZHANG LIYANG (CN)
JIN RENZHONG (CN)

PCT/CN2006/001459

January 04, 2007

June 26, 2006

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BAOSHAN IRON & STEEL (CN)
LI JUN (CN)
LIN XIUZHEN (CN)
ZHANG LIYANG (CN)
JIN RENZHONG (CN)

C22C38/14; C21D8/04; C21D9/48; C25D3/30

CN1176667A	1998-03-18
CN1273612A	2000-11-15
CN1303446A	2001-07-11
US4698102A	1987-10-06
KR20040057704A	2004-07-02
KR20010064849A	2001-07-11
KR20010109930A	2001-12-12
KR920005614B1	1992-07-10

LI J.: "Principle of the Metallurgical Process Control on Black-Sheet Production", BAOGANG TECHNOLOGY, no. 4, August 1998 (1998-08-01), pages 41 - 44
LI J.: "Review on Application Performances of DI Tinplate at Baosteel", BAOGANG TECHNOLOGY, no. 6, December 2000 (2000-12-01), pages 11

SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC. (Shanghai 3, CN)

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