Steel sheet having high plane integration and method of production of same

Abstract

Steel sheet having a high {222} plane integration comprising steel sheet having an Al content of less than 6.5 mass % characterized by one or both of (1) a {222} plane integration of one or both of an αFe phase and γFe phase with respect to the steel sheet surface being 60% to 99% and (2) a {200} plane integration of one or both of an αFe phase and γFe phase with respect to the steel sheet surface being 0.01% to 15%.

1 . Steel sheet having a high {222} plane integration comprised of steel sheet having an Al content of less than 6.5 mass %, characterized by one or both of:
 (1) a {222} plane integration of one or both of an αFe phase and γFe phase with respect to the steel sheet surface being 60% to 99% and,   (2) a {200} plane integration of one or both of an αFe phase and γFe phase with respect to the steel sheet surface being 0.01% to 15%.   
   
   
       2 . Steel sheet having a high {222} plane integration comprising steel sheet having an Al content of less than 6.5 mass % on at least one surface of which a second layer is deposited, characterized by one or both of:
 (1) a {222} plane integration of one or both of an αFe phase and γFe phase with respect to the steel sheet surface being 60% to 99% and   (2) a {200} plane integration of one or both of an αFe phase and γFe phase with respect to the steel sheet surface being 0.01% to 15%.   
   
   
       3 . Steel sheet having a high {222} plane integration comprising steel sheet having an Al content of less than 6.5 mass % on at least one surface of which a second layer is formed and having the second layer and steel sheet partially alloyed, characterized by one or both of:
 (1) a {222} plane integration of one or both of an αFe phase and γFe phase with respect to the steel sheet surface being 60% to 99% and   (2) a {200} plane integration of one or both of an αFe phase and γFe phase with respect to the steel sheet surface being 0.01% to 15%.   
   
   
       4 . Steel sheet having a high {222} plane integration comprising steel sheet having an Al content of less than 6.5 mass % on at least one surface of which a second layer is deposited and alloyed with the steel sheet, characterized by one or both of:
 (1) a {222} plane integration of one or both of an αFe phase and γFe phase with respect to the steel sheet surface being 60% to 99% and   (2) a {200} plane integration of one or both of an αFe phase and γFe phase with respect to the steel sheet surface being 0.01% to 15%.   
   
   
       5 . Steel sheet having a high {222} plane integration as set forth in  claim 1  characterized in that said {222} plane integration is 60% to 95%. 
   
   
       6 . Steel sheet having a high {222} plane integration as set forth in  claim 2  characterized in that said second layer contains at least one element from among Fe, Al, Co, Cu, Cr, Ga, Hf, Hg, In, Mn, Mo, Nb, Ni, Pb, Pd, Pt, Sb, Si, Sn, Ta, Ti, V, W, Zn, and Zr. 
   
   
       7 . Steel sheet having a high {222} plane integration as set forth in  claim 1  characterized in that the thickness of the steel sheet is 5 μm to 5 mm. 
   
   
       8 . Steel sheet having a high {222} plane integration as set forth in  claim 2  characterized in that the thickness of the second layer is 0.01 μm to 500 μm. 
   
   
       9 . A method of production of steel sheet having a high {222} plane integration having
 (a) a step of depositing a second layer on at least one surface of steel sheet having an Al content of less than 6.5 mass % serving as a matrix,   (b) a step of cold rolling the steel sheet on which the second layer has been deposited,   (c) a step of removing the second layer from the cold rolled steel sheet, and   (d) a step of heat treating the second layer from which the second layer has been removed to make the steel sheet recrystallize.   
   
   
       10 . A method of production of steel sheet having a high {222} plane integration having
 (a) a step of depositing a second layer on at least one surface of steel sheet having an Al content of less than 3.5 mass % serving as a matrix,   (b) a step of cold rolling the steel sheet on which the second layer has been deposited, and   (c) a step of heat treating the cold rolled steel sheet to make the steel sheet recrystallize,   (d) an Al content of the recrystallized steel sheet being less than 6.5 mass %.   
   
   
       11 . A method of production of steel sheet having a high {222} plane integration having:
 (a) a step of depositing a second layer on at least one surface of steel sheet having an Al content of less than 3.5 mass % serving as a matrix,   (b) a step of cold rolling the steel sheet on which the second layer has been deposited, and   (c) a step of heat treating the cold rolled steel sheet to alloy part of the second layer and make the steel sheet recrystallize,   (d) an Al content of the alloyed and recrystallized steel sheet being less than 6.5 mass %.   
   
   
       12 . A method of production of steel sheet having a high {222} plane integration having:
 (a) a step of depositing a second layer on at least one surface of steel sheet having an Al content of less than 3.5 mass % serving as a matrix,   (b) a step of cold rolling the steel sheet on which the second layer has been deposited, and   (c) a step of heat treating the cold rolled steel sheet to alloy the second layer and make the steel sheet recrystallize,   (d) an Al content of the steel sheet being less than 6.5 mass %.   
   
   
       13 . A method of production of steel sheet having a high {222} plane integration as set forth in  claim 9 , said method of production of steel sheet having a high {222} plane integration characterized by control to obtain one or both of:
 (1) a {222} plane integration of one or both of an αFe phase and γFe phase with respect to the steel sheet surface being 60% to 99% and   (2) a {200} plane integration of one or both of an αFe phase and γFe phase with respect to the steel sheet surface being 0.01% to 15%.   
   
   
       14 . A method of production of steel sheet having a high {222} plane integration as set forth in  claim 9 , said method of production of steel sheet having a high {222} plane integration characterized by control to obtain one or both of:
 (1) a {222} plane integration of one or both of an αFe phase and γFe phase with respect to the steel sheet surface being 60% to 95% and   (2) a {200} plane integration of one or both of an αFe phase and γFe phase with respect to the steel sheet surface being 0.01% to 15%.   
   
   
       15 . A method of production of steel sheet having a high {222} plane integration as set forth in  claim 9 , said method of production of steel sheet having a high {222} plane integration characterized in that the second layer contains at least one element among Fe, Al, Co, Cu, Cr, Ga, Hf, Hg, In, Mn, Mo, Nb, Ni, Pb, Pd, Pt, Sb, Si, Sn, Ta, Ti, V, W, Zn, and Zr. 
   
   
       16 . A method of production of steel sheet having a high {222} plane integration, said method of production of steel sheet having a high {222} plane integration characterized by having
 (a) a step of depositing on at least one surface of steel sheet having an Al content of less than 6.5 mass % serving as a matrix a second layer of one or more elements among Fe, Co, Cu, Cr, Ga, Hf, Hg, In, Mn, Mo, Nb, Ni, Pb, Pd, Pt, Sb, Si, Sn, Ta, Ti, V, W, Zn, and Zr,   (b) a step of cold rolling the steel sheet on which the second layer has been deposited,   (c) a step of removing the second layer from the cold rolled steel sheet, and   (d) a step of heat treating the second layer from which the second layer has been removed to make the steel sheet recrystallize.   
   
   
       17 . A method of production of steel sheet having a high {222} plane integration, said method of production of steel sheet having a high {222} plane integration characterized by having
 (a) a step of depositing on at least one surface of steel sheet having an Al content of less than 6.5 mass % serving as a matrix a second layer of one or more elements among Fe, Co, Cu, Cr, Ga, Hf, Hg, In, Mn, Mo, Nb, Ni, Pb, Pd, Pt, Sb, Si, Sn, Ta, Ti, V, W, Zn, and Zr,   (b) a step of cold rolling the steel sheet on which the second layer has been deposited, and   (c) a step of heat treating the cold rolled steel sheet to make the steel sheet recrystallize.   
   
   
       18 . A method of production of steel sheet having a high {222} plane integration, said method of production of steel sheet having a high {222} plane integration characterized by having
 (a) a step of depositing on at least one surface of steel sheet having an Al content of less than 6.5 mass % serving as a matrix a second layer of one or more elements among Fe, Co, Cu, Cr, Ga, Hf, Hg, In, Mn, Mo, Nb, Ni, Pb, Pd, Pt, Sb, Si, Sn, Ta, Ti, V, W, Zn, and Zr,   (b) a step of cold rolling the steel sheet on which the second layer has been deposited, and   (c) a step of heat treating the cold rolled steel sheet to alloy part of the second layer and make the steel sheet recrystallize.   
   
   
       19 . A method of production of steel sheet having a high {222} plane integration, said method of production of steel sheet having a high {222} plane integration characterized by having
 (a) a step of depositing on at least one surface of steel sheet having an Al content of less than 6.5 mass % serving as a matrix a second layer of one or more elements among Fe, Co, Cu, Cr, Ga, Hf, Hg, In, Mn, Mo, Nb, Ni, Pb, Pd, Pt, Sb, Si, Sn, Ta, Ti, V, W, Zn, and Zr,   (b) a step of cold rolling the steel sheet on which the second layer has been deposited, and   (c) a step of heat treating the cold rolled steel sheet to alloy the second layer and make the steel sheet recrystallize.   
   
   
       20 . A method of production of steel sheet having a high {222} plane integration as set forth in  claim 9  characterized in that the thickness of the steel sheet serving as said matrix is 10 μm to 10 mm. 
   
   
       21 . A method of production of steel sheet having a high {222} plane integration as set forth in  claim 9  characterized in that the thickness of the second layer is 0.05 μm to 1000 μm. 
   
   
       22 . A method of production of steel sheet having a high {222} plane integration as set forth in  claim 9  characterized by, before depositing said second layer, preheat treating the steel sheet. 
   
   
       23 . A method of production of steel sheet having a high {222} plane integration as set forth in  claim 22  characterized in that the temperature of said preheat treatment is 700 to 1100° C. 
   
   
       24 . A method of production of steel sheet having a high {222} plane integration as set forth in  claim 22  characterized in that an atmosphere of said preheat treatment is at least one of a vacuum, an insert gas atmosphere, and a hydrogen atmosphere. 
   
   
       25 . A method of production of steel sheet having a high {222} plane integration as set forth in  claim 9  characterized in that said step of depositing the second layer on the steel sheet is by plating. 
   
   
       26 . A method of production of steel sheet having a high {222} plane integration as set forth in  claim 9  characterized in that said step of depositing the second layer on the steel sheet is by roll cladding. 
   
   
       27 . A method of production of steel sheet having a high {222} plane integration as set forth in  claim 9  characterized in that a reduction rate in said step of cold rolling is 30% to 95%. 
   
   
       28 . A method of production of steel sheet having a high {222} plane integration as set forth in  claim 9  characterized in that a heat treatment temperature in said step of heat treatment is 600° C. to 1000° C. and a heat treatment time is 30 seconds or more. 
   
   
       29 . A method of production of steel sheet having a high {222} plane integration as set forth in  claim 9  characterized in that a heat treatment temperature in said step of heat treatment is over 1000° C.