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公开(公告)号：EP0679114B1
公开(公告)日：1999-07-21
申请号：EP95900015.9
申请日：1994-11-09
IPC分类号： B22D11/06
CPC分类号： B22D11/0668 , B22D11/0651
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公开(公告)号：EP0670757B1
公开(公告)日：1999-08-18
申请号：EP94900017.8
申请日：1993-11-22
发明人： FREEMAN, John , STREZOV, Lazar , OSBORN, Steve
IPC分类号： B22D11/06
CPC分类号： B22D11/0622
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公开(公告)号：EP0825907A1
公开(公告)日：1998-03-04
申请号：EP96911830.0
申请日：1996-04-29
发明人： STREZOV, Lazar
IPC分类号： B22D11
CPC分类号： B22D11/064 , B22D11/0651 , B22D11/11
摘要： Continuous casting of steel strip in twin-roll caster comprises casting rolls (16). Molten steel is delivered by a delivery system and comprising delivery nozzle (19b) to casting pool (30) supported above nip (10) between the casting rolls (16) which are rotated to deliver a solidified strip (20) downwardly from the nip. To avoid dissolution of carbon from refractories of the metal delivery system including the nozzle (19b), the molten steel is a silicon/manganese killed carbon steel having a manganese content of not less than 0.02 % by weight, a silicon content of not less than 0.10 % by weight, an aluminium content of less than 0.01 % by weight and a sulphur content of at least 0.02 % by weight. The required sulphur content of the steel may be achieved by addition of iron sulphide to a batch of steel in a tundish (18) of the delivery system.
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公开(公告)号：EP0825907B1
公开(公告)日：2001-09-12
申请号：EP96911830.6
申请日：1996-04-29
发明人： STREZOV, Lazar
CPC分类号： B22D11/064 , B22D11/0651 , B22D11/11
摘要： Continuous casting of steel strip in twin-roll caster comprises casting rolls (16). Molten steel is delivered by a delivery system and comprising delivery nozzle (19b) to casting pool (30) supported above nip (10) between the casting rolls (16) which are rotated to deliver a solidified strip (20) downwardly from the nip. To avoid dissolution of carbon from refractories of the metal delivery system including the nozzle (19b), the molten steel is a silicon/manganese killed carbon steel having a manganese content of not less than 0.02 % by weight, a silicon content of not less than 0.10 % by weight, an aluminium content of less than 0.01 % by weight and a sulphur content of at least 0.02 % by weight. The required sulphur content of the steel may be achieved by addition of iron sulphide to a batch of steel in a tundish (18) of the delivery system.
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5.发明公开AMORPHOUS OR GLASSY ALLOY SURFACED ROLLS FOR THE CONTINUOUS CASTING OF METAL STRIP 失效无定形或玻璃合金表面辊做好的金属带连铸
公开(公告)号：EP0986443A1
公开(公告)日：2000-03-22
申请号：EP98923930.6
申请日：1998-06-02
发明人： STREZOV, Lazar
CPC分类号： B22D11/0648
摘要： Twin roll casting has been applied with some success to non-ferrous metals, which solidify rapidly on cooling. The same, however, is not true for ferrous metals, as it has not been possible to achieve sufficiently rapid and even cooling of metal over the casting surfaces of the rolls. This problem has been overcome by utilising a metallic surface for the rolls, which has a high affinity for the molten steel of the casting pool and a melting temperature greater than the temperature of the casting surface. The molten steel produces extremely good wetting of the casting surface of the roll, resulting in a wetting angle of the molten steel on the casting surface of less than 40°. Preferably, this wetting angle is less than 20° and the casting surface has an Arithmetic Mean Roughness Value (Ra) of less than 10 microns. These desirable properties on the roll surface are achieved by selecting an at least partially amorphous alloy of two constituents. Preferably, the alloy is a fully amorphous alloy of the nickel-phosphorus systemcontaining about 10 % phosphorus and the balance nickel, which may be applied by eletroless coating. This roll surface prevents the build-up of iron oxide on the casting surfaces of the rolls, which build-up interferes with the uniform conduction of heat away from the molten steel, resulting in simultaneous solidification of the δ and η iron phases (0.01-0.18 %C), which causes a surface defect, known as 'crocodile-skin'. The net effect of utilising this amorphous alloy for the surface of the casting roll is a superior and uniform conduction of heat away from the molten steel, rapid transformation of the steel's microstructure into the wholly austenitic (η) region, exhibited by fine prior austenite grain boundaries conforming to dendritic grain boundaries and absence of 'crocodile-skin' surface defects on the cast strip.
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公开(公告)号：EP0679114A1
公开(公告)日：1995-11-02
申请号：EP95900015.0
申请日：1994-11-09
IPC分类号： B22D11
CPC分类号： B22D11/0668 , B22D11/0651
摘要： Method of continuously casting metal strip (20) from a casting pool of molten metal supported on chilled casting rolls (16) such that metal solidifies onto moving casting surfaces of the rolls. The metal is austenitic stainless steel containing chromium and nickel in a ratio (Cr/Ni)eq of less than 1.60 (preferably no greater than 1.55) and the casting surface of each roll has an Arithmetical Mean Roughness Value (Ra) of more than 2.5 microns (preferably in the range 2.5 to 15 microns).
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公开(公告)号：EP0670757A1
公开(公告)日：1995-09-13
申请号：EP94900017.0
申请日：1993-11-22
发明人： FREEMAN, John , STREZOV, Lazar , OSBORN, Steve
IPC分类号： B22D11
CPC分类号： B22D11/0622
摘要： Method and apparatus for continuously casting metal strip (20) of the kind in which a casting pool of molten metal (30) is formed in contact with a moving casting surface (16A) such that metal solidifies from the pool onto the moving casting surface. By making the casting surface (16A) very smooth and inducing relative vibratory movement between the molten metal and the casting surface at selected frequency and amplitude, the heat transfer from the solidifying metal is dramatically improved. The casting surface has an Arithmetical Mean Roughness Value (Ra) of less than 5 microns and the induced vibratory movement preferably has a frequency of no more than 20 kHz. This enables improved casting productivity and also produces a marked refinement of the surface structure of the cast metal.
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公开(公告)号：EP1100638A1
公开(公告)日：2001-05-23
申请号：EP99938060.3
申请日：1999-08-06
IPC分类号： B22D11/06
CPC分类号： B22D11/0668 , B22D11/0651
摘要： In twin roll casting of steel strip, molten steel is introduced into the nip between parallel casting rolls (16) to create casting pool (30) supported on casting surfaces (16A) of the rolls and the rolls are rotated to deliver solidified strip (20) downwardly from the nip. Casting surfaces (16A) are textured by a random pattern of discrete projections having pointed peaks with a surface distribution of between 10 and 100 peaks per mm2 and an average height of at least 10 microns. The random texture may be produced by grit blasting the casting surfaces on a substrate covered by a protective coating. Alternatively the texture may be produced by chemical deposition or electrodeposition of a coating onto a substrate to form the casting surfaces.
摘要翻译： 在钢带的双辊铸造中，将钢水引入平行浇铸辊（16）之间的辊隙中以形成支撑在辊的浇铸表面（16A）上的浇注熔池（30），并且辊旋转以输送凝固带（20 ）从辊隙向下。 铸造表面（16A）通过具有尖峰的离散投影的随机图案进行纹理化，尖峰具有每平方毫米10至100个峰值和至少10微米的平均高度的表面分布。 随机纹理可以通过在由保护涂层覆盖的基底上喷砂铸造表面而产生。 或者，可以通过将涂层化学沉积或电沉积到基底上以形成铸造表面来产生纹理。
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