STEEL PRODUCT REDUCED IN AMOUNT OF ALUMINA CLUSTER

WIPO Patent Application WO/2004/009854

A1

A steel product reduced in the amount of an alumina cluster, which is produced by a method comprising deoxidizing a molten steel by the use of Al, adding one or more rare earth elements (REM) selected from Ce, La, Pr and Nd to the deoxidized molten steel, followed by casting, characterized in that (a) an oxide inclusion containing alumina and a REM oxide as main components has a REM oxide content of 0.5 to 15 % in terms of mass % relative to the oxide inclusion, (b) the requirement (a) is satisfied and further the mass ratio of the total REM to the total oxygen: REM/T.O in the steel product is 0.05 to 0.5, or (c) the total amount of REM is not less than 0.1 ppm and less than 10 ppm and the amount of REM in the state of solid solution is less than 1 ppm.

JPS5919966

[Title of the Invention] A prior disposal method of molten iron

MIZOGUCHI TOSHIAKI (JP)
UESHIMA YOSHIYUKI (JP)
YAMAGUCHI JUN (JP)
WATANABE YU (JP)
MIKASA AKIRA (JP)
YASUI HIROTSUGU (JP)

PCT/JP2003/009274

January 29, 2004

July 22, 2003

Click for automatic bibliography generation  

NIPPON STEEL CORP (JP)
MIZOGUCHI TOSHIAKI (JP)
UESHIMA YOSHIYUKI (JP)
YAMAGUCHI JUN (JP)
WATANABE YU (JP)
MIKASA AKIRA (JP)
YASUI HIROTSUGU (JP)

C21C7/04; C21C7/00; C21C7/06; C22C38/00; C22C38/04; C22C38/06; C22C38/14; C22C38/58; (IPC1-7): C21C7/04; C22C38/00; C22C38/06; C22C38/58

JPS5270918A	1977-06-13
JP2000144330A	2000-05-26
JP2000273524A	2000-10-03
JP2002105527A	2002-04-10

See also references of EP 1538224A4
SHIROTA ET AL., MATERIALS AND PROCESSES, vol. 4, 1991, pages 1214

Aoki, Atsushi (ISHIDA & ASSOCIATES Toranomon 37 Mori Bldg., 5-1, Toranomon 3-chom, Minato-ku Tokyo, JP)

View/Download PDF      PDF Help

Previous Patent: IMPROVED HIDE TREATMENT

Next Patent: PROCESS FOR PRODUCING OIL TEMPERED WIRE