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46results about How to "Affect strength" patented technology

Process for producing grain-oriented electrical steel strip and grain-oriented electrical steel strip obtained according to said process

With a process for producing grain-oriented electrical steel strip by means of thin slab continuous casting, comprising the following process steps: a) smelting a steel with a smelt which, in addition to iron (Fe) and unavoidable impurities, contains Si: 2.00-4.00 wt %, C: 0.025-0.100 wt %, Mn: 0.060-0.500 wt %, Cu: 0.200-0.550 wt %, Alsl: 0.010-0.030 wt %, S: <100 ppm, N: 80-120 ppm, and one or more elements from the group comprising Cr, V, Ni and Mo, each <0.100 wt %, b) continuously casting the smelt by thin slab continuous casting to form a strand having a thickness of 50-120 mm, and dividing the strand into thin slabs, c) heating up the thin slabs, preferably in a linear furnace, to a temperature above 1050° C. and subjecting the slabs to homogenization annealing at a maximum temperature of 1250° C., d) immediately prior to the first hot rolling pass of a subsequent hot rolling process, passing the slabs through an induction heating device, in particular, a high frequency induction heating device, and heating the thin slabs to a maximum temperature of 1350° C., which is above the respective homogenization temperature of process step c), e) continuously hot rolling the thin slabs to form a hot strip having a thickness of 1.8 mm-3.0 mm, f) cooling and reeling the hot-rolled strip at a reeling temperature of less than 650° C. to form a coil, g) pickling the hot-rolled strip after reeling and prior to a subsequent cold rolling step, h) cold rolling the hot strip in a first cold rolling stage to an (intermediate) thickness of 0.50 mm-0.80 mm, i) subjecting the resulting cold-rolled strip to recrystallization and decarburization annealing at a strip temperature ranging from 820° C.-890° C. for a period of 300-600 seconds in a gaseous annealing atmosphere which acts on the cold-rolled strip and contains nitrogen (N2) and hydrogen (H2), and which has a water vapor/hydrogen partial pressure ratio pH2O/pH2 of 0.30 to 0.60, j) in a second cold rolling stage, cold rolling the cold strip which has been subjected to recrystallization and decarburization annealing to its (final) thickness or its nominal usable thickness of 0.15 mm-0.40 mm, k) applying an annealing separator (non-stick layer) containing MgO to the strip surface of the cold-rolled strip which has been rolled to its final thickness or usable thickness, l) subjecting the cold-rolled strip which has been coated with the annealing separator to secondary recrystallization annealing by high-temperature annealing in a bell-type furnace at a temperature of >1150° C., forming a finished steel strip having a pronounced Goss texture, and m) coating the finished steel strip which has undergone secondary recrystallization annealing with an electrically insulating layer and then stress-free annealing or stress-relief annealing the coated finished steel strip, an improved process for producing grain-oriented electrical steel strip by means of thin slab continuous casting is provided, by which it is possible to introduce an inhibitor into the steel strip, which controls secondary grain growth during secondary recrystallization annealing in a high-temperature bell-type annealing furnace.
Owner:SMS GRP GMBH

Process for producing grain-oriented electrical steel strip and grain-oriented electrical steel strip obtained according to said process

InactiveUS20160108493A1Affect strengthHigh chemical proportions of copperInorganic material magnetismFurnace typesWater vaporThin slab
With a process for producing grain-oriented electrical steel strip by means of thin slab continuous casting, comprising the following process steps: a) smelting a steel with a smelt which, in addition to iron (Fe) and unavoidable impurities, contains Si: 2.00-4.00 wt %, C: 0.025-0.100 wt %, Mn: 0.060-0.500 wt %, Cu: 0.200-0.550 wt %, Alsl: 0.010-0.030 wt %, S: <100 ppm, N: 80-120 ppm, and one or more elements from the group comprising Cr, V, Ni and Mo, each <0.100 wt %, b) continuously casting the smelt by thin slab continuous casting to form a strand having a thickness of 50-120 mm, and dividing the strand into thin slabs, c) heating up the thin slabs, preferably in a linear furnace, to a temperature above 1,050° C. and subjecting the slabs to homogenization annealing at a maximum temperature of 1,250° C., d) immediately prior to the first hot rolling pass of a subsequent hot rolling process, passing the slabs through an induction heating device, in particular, a high frequency induction heating device, and heating the thin slabs to a maximum temperature of 1,350° C., which is above the respective homogenization temperature of process step c), e) continuously hot rolling the thin slabs to form a hot strip having a thickness of 1.8 mm-3.0 mm, f) cooling and reeling the hot-rolled strip at a reeling temperature of less than 650° C. to form a coil, g) annealing the hot-rolled strip after reeling and prior to a subsequent cold rolling step at a temperature of between 910° C. and 1,140° C., h) cold rolling the hot strip in a first cold rolling stage to an (intermediate) thickness of 0.50 mm-0.80 mm, i) subjecting the resulting cold-rolled strip to recrystallization and decarburization annealing at a strip temperature ranging from 820° C.-890° C. for a period of 300-600 seconds in a gaseous annealing atmosphere which acts on the cold-rolled strip and contains nitrogen (N2) and hydrogen (H2), and which has a water vapor/hydrogen partial pressure ratio pH2O/pH2 of 0.30 to 0.60, j) in a second cold rolling stage, cold rolling the cold strip which has been subjected to recrystallization and decarburization annealing to its (final) thickness or its nominal usable thickness of 0.15 mm-0.40 mm, k) applying an annealing separator (non-stick layer) containing MgO to the strip surface of the cold-rolled strip which has been rolled to its final thickness or usable thickness, l) subjecting the cold-rolled strip which has been coated with the annealing separator to secondary recrystallization annealing by high-temperature annealing in a bell-type furnace at a temperature of >1,150° C., forming a finished steel strip having a pronounced Goss texture, and m) coating the finished steel strip which has undergone secondary recrystallization annealing with an electrically insulating layer and then stress-free annealing or stress-relief annealing the coated finished steel strip, an improved process for producing grain-oriented electrical steel strip by means of thin slab continuous casting is provided, by which it is possible to introduce an inhibitor into the steel strip, which controls secondary grain growth during secondary recrystallization annealing in a high-temperature bell-type annealing furnace.
Owner:SMS GRP GMBH

Shim plate for tools for cutting machining as well as a tool

A shim plate for mounting in a cutting tool for rotary chip removing machining, the cutting tool including a basic body having a rotational axis, a peripheral envelope surface concentric with the rotational axis, a front end surface, and at least one insert seat including a seat surface, the basic body being rotatable in a direction of rotation and arranged to, in each insert seat against the seat surface, receive the shim plate and a mountable cutting insert adjacent to the shim plate. The shim plate includes a bottom surface adapted to adjoin to the seat surface of the basic body, a contact surface opposite to the bottom surface and adapted to adjoin to the cutting insert, and at least one side surface that extends between the bottom surface and the contact surface. In a radial cross-section orthogonal to the rotational axis and traversing the shim plate, an imaginary straight line (a) associated with the bottom surface, intersecting a point (a1) of the cross-section where the bottom surface is closest to the envelope surface of the basic body and a point (a2) of the cross-section where the bottom surface is closest to the rotational axis of the basic body, and an imaginary straight line (b) associated with the contact surface, intersecting a point (b1) of the cross-section where the contact surface is closest to the envelope surface of the basic body and a point (b2) of the cross-section where the contact surface is closest to the rotational axis of the basic body, diverge toward the envelope surface of the basic body and form an angle α with each other.
Owner:SANDVIK INTELLECTUAL PROPERTY AB
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