公开(公告)号：US06896034B2

公开(公告)日：2005-05-24

申请号：US10420378

申请日：2003-04-22

申请人： Lazar Strezov ,  Kannapar Mukunthan ,  Walter Bleide ,  Rama Mahapatra

发明人： Lazar Strezov ,  Kannapar Mukunthan ,  Walter Bleide ,  Rama Mahapatra

IPC分类号： B21B1/26 ,  B21B1/46 ,  B21B37/76 ,  B21B45/02 ,  B22D11/06 ,  B22D11/124 ,  B22D11/16 ,  B22D11/22 ,  C21D1/18 ,  C21D8/02 ,  C21D9/573

CPC分类号： C21D8/0226 ,  B21B1/26 ,  B21B1/463 ,  B21B37/76 ,  B21B45/0233 ,  B21B2201/02 ,  B21B2201/04 ,  B22D11/0622 ,  B22D11/124 ,  B22D11/16 ,  B22D11/225 ,  C21D1/18 ,  C21D8/0215 ,  C21D8/0263 ,  C21D9/573 ,  C21D2211/005

摘要： A method of controlling a continuous steel strip casting process based on customer-specified requirements includes a general purpose computer in which product specifications of steel product ordered by a customer is entered. The computer is configured to automatically map the product specifications to process parameters/set points for controlling the continuous steel strip casting process in a manner to produce the customer ordered product, and in one embodiment produces a process change report detailing such process parameters/set points for operator use in physically implementing such process parameters/set points in the strip casting process. Alternatively, the computer may provide the process parameters/set points directly to the strip casting process for automatic control thereof in producing the customer ordered steel product. The process of the present invention is capable of substantially reducing the time between a customer request for a steel product and delivery thereof over that of conventional steel manufacturing processes.

摘要翻译： 根据客户指定的要求控制连续钢带铸造过程的方法包括进入客户订购的钢产品的产品规格的通用计算机。 计算机被配置为以产生客户订购产品的方式自动地将产品规格映射到用于控制连续钢带铸造过程的工艺参数/设定点，并且在一个实施例中产生详细描述这些工艺参数/设定点的过程变化报告 用于操作者在物料实施条带铸造过程中的这些工艺参数/设定点。 或者，计算机可以将工艺参数/设定点直接提供给带材铸造过程，以便在生产客户订购的钢产品时进行自动控制。 本发明的方法能够大大减少客户对钢铁产品的要求与其传送之间的时间超过常规钢铁制造工艺的时间。

公开(公告)号：US06585030B2

公开(公告)日：2003-07-01

申请号：US09967163

申请日：2001-09-28

申请人： Lazar Strezov ,  Kannappar Mukunthan ,  Walter Blejde ,  Rama Mahapatra

发明人： Lazar Strezov ,  Kannappar Mukunthan ,  Walter Blejde ,  Rama Mahapatra

IPC分类号： B22D1122

CPC分类号： C21D8/0215 ,  B22D11/0622 ,  B22D11/124 ,  C21D1/18 ,  C21D8/0226 ,  C21D9/573 ,  C22C38/02 ,  C22C38/04

摘要： Steel strips and methods for producing steel strips are provided. In an illustrated embodiment, a method includes continuously casting molten low carbon steel into a strip of no more than 5 mm thickness having austenite grains that are coarse grains of 100-300 micron width; and providing desired yield strength in the cast strip by cooling the strip to transform the austenite grains to ferrite in a temperature range between 850° C. and 400° C. at a selected cooling rate of at least 0.01° C./sec to produce a microstructure that provides a strip having a yield strength of at least 200 MPa. The low carbon steel produced desired microstructure.

摘要翻译： 提供钢带和生产钢带的方法。 在所示实施例中，一种方法包括将熔融的低碳钢连续铸造成不超过5mm厚度的带有100-300微米宽的粗晶粒的奥氏体晶粒的条带; 并通过冷却带材在铸钢带中提供期望的屈服强度，以在至少0.01℃/秒的选定冷却速率下在850℃和400℃之间的温度范围内将奥氏体晶粒转化为铁素体，以产生 提供具有至少200MPa的屈服强度的条带的微结构。 低碳钢生产出所需的微观结构。

公开(公告)号：US07367378B2

公开(公告)日：2008-05-06

申请号：US11277675

申请日：2006-03-28

申请人： Walter Blejde ,  Rama Mahapatra ,  Lazar Strezov

发明人： Walter Blejde ,  Rama Mahapatra ,  Lazar Strezov

IPC分类号： B22D11/06

CPC分类号： B22D11/0674 ,  B22D11/0622 ,  B22D11/0651 ,  Y10T428/12

摘要： A method of producing cast steel strip having low surface roughness and low porosity by casting with molten steel having a total oxygen content of at least about 100 ppm and a temperature that allows a majority of any oxide inclusions to be in a liquidus state. The steel strip produced by the method may have a per unit area density of at least about 120 oxide inclusions per square millimeter to a depth of about 2 microns from the strip surface.

摘要翻译： 一种通过铸造具有至少约100ppm的总氧含量的钢水和允许大部分任何氧化物夹杂物处于液相状态的温度来生产具有低表面粗糙度和低孔隙率的铸钢带的方法。 通过该方法生产的钢带可以具有每单位面积密度为每平方毫米至少约120个氧化物夹杂物，距带材表面约2微米的深度。

公开(公告)号：US07281569B2

公开(公告)日：2007-10-16

申请号：US10761947

申请日：2004-01-21

申请人： Walter N. Blejde ,  Rama Mahapatra ,  Lazar Strezov

发明人： Walter N. Blejde ,  Rama Mahapatra ,  Lazar Strezov

IPC分类号： B22D11/06

CPC分类号： B22D11/0674 ,  B22D11/0622 ,  B22D11/0651 ,  Y10T428/12

摘要： A method of producing cast steel strip having low surface roughness and low porosity by casting with molten steel having a total oxygen content of at least about 70 ppm and a free oxygen content between 20 and 60 ppm, and a temperature that allows a majority of any oxide inclusions to be in a liquidus state. The total oxygen content may be at least 100 ppm and the free oxygen content between 30 and 50 ppm. The steel strip produced by the method may have a per unit area density of at least about 120 oxide inclusions per square millimeter to a depth of about 2 microns from the strip surface.

摘要翻译： 一种通过铸造具有至少约70ppm的总氧含量和20至60ppm的游离氧含量的钢水铸造而生产具有低表面粗糙度和低孔隙率的铸钢带的方法，以及允许大多数任何 氧化物夹杂物处于液相线状态。 总氧含量可以至少为100ppm，游离氧含量为30-50ppm。 通过该方法生产的钢带可以具有每单位面积密度为每平方毫米至少约120个氧化物夹杂物，距带材表面约2微米的深度。

公开(公告)号：US20060196630A1

公开(公告)日：2006-09-07

申请号：US11419684

申请日：2006-05-22

申请人： Walter Blejde ,  Rama Mahapatra ,  Lazar Strezov

发明人： Walter Blejde ,  Rama Mahapatra ,  Lazar Strezov

IPC分类号： B22D11/06

CPC分类号： B22D11/0622

摘要： A method of producing strip comprising the steps of assembling a pair of casting rolls with a nip between them, introducing between the casting rolls to form a casting pool of molten carbon steel having a total oxygen content of at least 70 ppm usually less than 250 ppm, and a free oxygen content 20 and 60 ppm, counter rotating the casting rolls, solidifying the molten steel on the rolls to form metal shells with levels of oxide inclusions reflected by the total oxygen content of the molten steel, and forming thin steel strip through the nip between the casting rolls from the solidified shells. The molten steel may have a total oxygen content is at least 100 ppm and the free oxygen content may be between 30 and 50 ppm. A unique steel strip may be obtained using the method having ductile properties.

摘要翻译： 一种生产带材的方法，包括以下步骤：将一对铸辊与它们之间的辊隙组装，在铸辊之间引入以形成总氧含量至少为70ppm，通常小于250ppm的熔融碳钢铸造池 ，游离氧含量为20〜60ppm，对浇铸辊进行反转，固化轧辊上的钢水，形成金属壳，氧化物夹杂物水平由钢水的总氧含量反映，并形成薄钢带 来自凝固壳的铸辊之间的辊隙。 钢水的总氧含量可以至少为100ppm，游离氧含量可以在30-50ppm之间。 可以使用具有延展性的方法获得独特的钢带。

公开(公告)号：US20060144553A1

公开(公告)日：2006-07-06

申请号：US11255604

申请日：2005-10-20

申请人： Walter Blejde ,  Rama Mahapatra ,  James Williams ,  Frank Barbaro ,  Philip Renwick ,  Harold Kaul ,  Andrew Phillips ,  Christopher Killmore ,  Lazar Strezov

发明人： Walter Blejde ,  Rama Mahapatra ,  James Williams ,  Frank Barbaro ,  Philip Renwick ,  Harold Kaul ,  Andrew Phillips ,  Christopher Killmore ,  Lazar Strezov

IPC分类号： B22D11/06

CPC分类号： B22D11/001 ,  B22D11/0622 ,  B22D11/117 ,  C21D8/0415 ,  C21D2211/004 ,  C22C38/02 ,  C22C38/04 ,  Y10T428/12993

摘要： A steel product with a high austenite grain coarsening temperature having less than 0.4% carbon, less than 0.06% aluminium, less than 0.01% titanium, less than 0.01% niobium, and less than 0.02% vanadium by weight, and having fine oxide particles containing silicon and iron distributed through the steel microstructure having an average particle size less than 50 nanometers and may be between 5 and 30 nanometers. The steel product may have fine oxide particles distributed through the microstructure capable of restricting ferrite recrystallisation for strain levels up to at least 10.0%, for temperatures up to 750 ° C. with holding times up to 20 minutes. The steel product may be made by continuous casting of steel strip introduced between the casting rolls to form a casting pool of molten carbon steel having a total oxygen content of at least 70 ppm usually less than 250 ppm, and a free oxygen content 20 and 60 ppm, counter rotating the casting rolls.

摘要翻译： 具有低奥氏体晶粒粗化温度的钢产品，具有小于0.4％的碳，小于0.06％的铝，小于0.01％的钛，小于0.01％的铌和小于0.02％的钒，并且具有含有 硅和铁通过平均粒度小于50纳米的钢微结构分布，并且可以在5和30纳米之间。 钢制品可以具有通过微结构分布的细小氧化物颗粒，其能够限制铁素体再结晶，对于高达750℃的温度，至多达到10.0％的应变水平，保持时间长达20分钟。 钢产品可以通过在铸辊之间引入的钢带的连续铸造来制造，以形成总氧含量通常低于250ppm，游离氧含量20和60的熔融碳钢的铸造池 ppm，反转铸辊。

公开(公告)号：US06818073B2

公开(公告)日：2004-11-16

申请号：US10422217

申请日：2003-04-24

申请人： Lazar Strezov ,  Kannappar Mukunthan ,  Walter Blejde ,  Rama Mahapatra

发明人： Lazar Strezov ,  Kannappar Mukunthan ,  Walter Blejde ,  Rama Mahapatra

IPC分类号： C22C3800

CPC分类号： C21D8/0215 ,  B22D11/0622 ,  B22D11/124 ,  C21D1/18 ,  C21D8/0226 ,  C21D9/573 ,  C22C38/02 ,  C22C38/04

摘要： Steel strips and methods for producing steel strips are provided. In an illustrated embodiment, a method includes continuously casting molten low carbon steel into a strip of no more than 5 mm thickness having austenite grains that are coarse grains of 100-300 micron width; and providing desired yield strength in the cast strip by cooling the strip to transform the austenite grains to ferrite in a temperature range between 850° C. and 400° C. at a selected cooling rate of at least 0.01° C./sec to produce a microstructure that provides a strip having a yield strength of at least 200 MPa. The low carbon steel produced desired microstructure.

摘要翻译： 提供钢带和生产钢带的方法。 在所示实施例中，一种方法包括将熔融的低碳钢连续铸造成不超过5mm厚度的带有100-300微米宽的粗晶粒的奥氏体晶粒的条带; 并通过冷却带材在铸钢带中提供期望的屈服强度，以在至少0.01℃/秒的选定冷却速率下在850℃和400℃之间的温度范围内将奥氏体晶粒转化为铁素体，以产生 提供具有至少200MPa的屈服强度的条带的微结构。 低碳钢生产出所需的微观结构。

公开(公告)号：US06675869B2

公开(公告)日：2004-01-13

申请号：US09967166

申请日：2001-09-28

申请人： Lazar Strezov ,  Kannappar Mukunthan ,  Walter Blejde ,  Rama Mahapatra

发明人： Lazar Strezov ,  Kannappar Mukunthan ,  Walter Blejde ,  Rama Mahapatra

IPC分类号： B22D11124

CPC分类号： B21B1/463 ,  B21B37/76 ,  B21B2201/02 ,  B22D11/0622 ,  B22D11/124 ,  C21D1/18 ,  C21D8/0215 ,  C21D8/0226 ,  C21D8/0263

摘要： A plain carbon steel strip is continuously cast in a twin roll caster and passes to a run out table on which it is subjected to accelerated cooling by means of cooling headers whereby it is cooled to transform the strip from austenite to ferrite at a temperature range between 850° C. and 400° C. at a cooling rate of not less than 90° C./sec, such that the strip has a yield strength of greater than 450 MPa. The strip after casting and before cooling is passed through a hot rolling mill to reduce the thickness of strip by at least 15% and up to 50%.

摘要翻译： 普通碳钢带连续铸造在双辊铸造机中，并通过冷却集管从而将钢带从奥氏体转变成铁素体，并在两个轧辊之间的温度范围内， 850℃和400℃，冷却速度不低于90℃/秒，使得带材的屈服强度大于450MPa。 铸造后的钢带和冷却前通过热轧机将钢带的厚度减少至少15％和高达50％。

公开(公告)号：US07299856B2

公开(公告)日：2007-11-27

申请号：US11000593

申请日：2004-12-01

申请人： Walter Blejde ,  Rama Mahapatra ,  Lazar Strezov

发明人： Walter Blejde ,  Rama Mahapatra ,  Lazar Strezov

IPC分类号： B22D11/10

CPC分类号： B22D11/0674 ,  B22D11/0622 ,  B22D11/0651 ,  Y10T428/12

摘要： A thin steel strip with low surface roughness and low porosity produced by casting with molten steel having a total oxygen content of at least about 100 ppm and a temperature that allows a majority of any oxide inclusions to be in a liquidus state. The steel strip produced by the method may have a per unit area density of at least about 120 oxide inclusions per square millimeter to a depth of about 2 microns from the strip surface.

摘要翻译： 通过铸造具有至少约100ppm的总氧含量的钢水和允许大部分任何氧化物夹杂物处于液相状态的温度产生的具有低表面粗糙度和低孔隙率的薄钢带。 通过该方法生产的钢带可以具有每单位面积密度为每平方毫米至少约120个氧化物夹杂物，距带材表面约2微米的深度。

公开(公告)号：US06581672B2

公开(公告)日：2003-06-24

申请号：US09968424

申请日：2001-10-01

申请人： Lazar Strezov ,  Kannappar Mukunthan ,  Walter Blejde ,  Rama Mahapatra

发明人： Lazar Strezov ,  Kannappar Mukunthan ,  Walter Blejde ,  Rama Mahapatra

IPC分类号： B22D1116

CPC分类号： C21D8/0226 ,  B21B1/26 ,  B21B1/463 ,  B21B37/76 ,  B21B45/0233 ,  B21B2201/02 ,  B21B2201/04 ,  B22D11/0622 ,  B22D11/124 ,  B22D11/16 ,  B22D11/225 ,  C21D1/18 ,  C21D8/0215 ,  C21D8/0263 ,  C21D9/573 ,  C21D2211/005

摘要： A method of controlling a continuous steel strip casting process based on customer-specified requirements includes a general purpose computer in which product specifications of steel product ordered by a customer is entered. The computer is configured to automatically map the product specifications to process parameters/set points for controlling the continuous steel strip casting process in a manner to produce the customer ordered product, and in one embodiment produces a process change report detailing such process parameters/set points for operator use in physically implementing such process parameters/set points in the strip casting process. Alternatively, the computer may provide the process parameters/set points directly to the strip casting process for automatic control thereof in producing the customer ordered steel product. The process of the present invention is capable of substantially reducing the time between a customer request for a steel product and delivery thereof over that of conventional steel manufacturing processes.