Method of producing crystal bodies having controlled crystalline orientation
AssigneeKawasaki Steel Corporation
InventorsHiromi Mitsunori, Toshio Sadayori
Life of this patent
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Abstract
This invention lies in that a seed material controlled into a predetermined orientation is joined to a treating material under an activated state of joint face or through an interposition of an insert member and heated to a temperature causing grain boundary movement to render a whole of a joined body into a crystal body having a predetermined crystalline orientation. Furthermore, not only plate material and bar material but also coil can be used as the treating material, so that crystal bodies having excellent desired properties can be mass-produced with a good yield and in industrial scale.
Claims9
A method of producing grain oriented electromagnetic steel sheets having improved magnetic properties by hot rolling a slab of silicon-containing steel, rendering the hot rolled sheet into final thickness without annealing and cold rolling or through annealing and/or cold rolling at least one time, and then subjecting it to a finish annealing, including a step of joining a recrystallization seed material on an edge portion of the steel sheet as a treating material at a step after the hot rolling and before the finish annealing under a condition satisfying the following orientation relationships, in which said seed material is contacted with said steel sheet through an insert member having a melting point lower than those of said seed material and steel sheet, and then heated to a temperature causing grain boundary movement to grow the crystalline orientation of said seed material over a whole of said steel sheet,
- .vertline..alpha..vertline..ltoreq.5.degree.
- 1.ltoreq..vertline..beta..vertline..ltoreq.5.degree.
- where
- .alpha.:
- angle defined by a projection line of <001>
- axis of seed material with respect to rolling face of steel sheet and the rolling direction of steel sheet;
- .beta.:
- inclination angle of <001>
- axis of seed material with respect to rolling face of steel sheet.
A method of producing grain oriented electromagnetic steel sheets having improved magnetic properties by hot rolling a slab of silicon-containing steel, rendering the hot rolled sheet into a final thickness without annealing and cold rolling or through annealing and/or cold rolling at least one time, and then subjecting it to a primary recrystallization annealing and further to a finish annealing, including a step of joining a recrystallization seed material on an edge portion of the steel sheet as a treating material at a step after the hot rolling and before the finish annealing under a condition satisfying the following orientation relationships, in which said seed material is contacted with said steel sheet through an insert member having a melting point lower than those of said seed material and steel sheet, and then heated to a temperature causing grain boundary movement to grow the crystalline orientation of said seed material over a whole of said steel sheet,
- .vertline..alpha..vertline..ltoreq.5.degree.
- 1.ltoreq..vertline..beta..vertline..ltoreq.5.degree.
- where
- .alpha.:
- angle defined by a projection line of <001>
- axis of seed material with respect to rolling face of steel sheet and the rolling direction of steel sheet;
- .beta.:
- inclination angle of <001>
- axis of seed material with respect to rolling face of steel sheet.
A method of producing bidirectional oriented electromagnetic steel sheets having improved magnetic properties by hot rolling a slab of silicon-containing steel, rendering the hot rolled sheet into a final thickness without annealing and cold rolling or through annealing and/or cold rolling at least one time and then subjecting it to a finish annealing, including a step of joining a recrystallization seed material on an edge portion of the steel sheet as a treating material at a step after the hot rolling and before the finish annealing under a condition satisfying the following orientation relationships, in which said seed material is contacted with said steel sheet through an insert member having a melting point lower than those of said seed material and steel sheet, and then heated to a temperature causing grain boundary movement to grow the crystalline orientation of said seed material over a whole of said steel sheet,
- .vertline..alpha..vertline..ltoreq.10.degree.
- .vertline..beta..vertline..ltoreq.10.degree.
- where
- .alpha.:
- angle defined by a projection line of <001>
- axis of seed material with respect to rolling face of steel sheet and the rolling direction of steel sheet;
- .beta.:
- inclination angle of {100} face of seed material with respect to rolling face of steel sheet.
A method of producing bidirectional oriented electromagnetic steel sheets having improved magnetic properties by hot rolling a slab of silicon-containing steel, rendering the hot rolled sheet into a final thickness without annealing and cold rolling or through annealing and/or cold rolling at least one time, and then subjecting it to a primary recrystallization annealing and further to a finish annealing, including a step of joining a recrystallization seed material on an edge portion of the steel sheet as a treating material at a step after the hot rolling and before the finish annealing under a condition satisfying the following orientation relationships, in which said seed material is contacted with said steel sheet through an insert member having a melting point lower than those of said seed material and steel sheet, and then heated to a temperature causing grain boundary movement to grow the crystalline orientation of said seed material over a whole of said steel sheet,
- .vertline..alpha..vertline..ltoreq.10.degree.
- .vertline..beta..vertline..ltoreq.10.degree.
- where
- .alpha.:
- angle defined by a projection line of <001>
- axis of seed material with respect to rolling face of steel sheet and the rolling direction of steel sheet;
- .beta.:
- inclination angle of {100} face of seed material with respect to rolling face of steel sheet.
Dependencies are inferred from the claim text.