公开(公告)号：US06298898B1

公开(公告)日：2001-10-09

申请号：US09348626

申请日：1999-07-06

申请人： Shivantha Mahadeva ,  Darius Pradhir Kumar Singh ,  Doug Muller ,  Geoff Martin ,  Philip Renwick

发明人： Shivantha Mahadeva ,  Darius Pradhir Kumar Singh ,  Doug Muller ,  Geoff Martin ,  Philip Renwick

IPC分类号： B22D4600

CPC分类号： B22D46/00

摘要： A method of optimizing cycle time and/or casting quality in the making of a cast metal product which has been defined by a CAD product model. The method involves the steps of (a) providing a computer casting model using objective functions that simulate the filling and solidification of the CAD product model within dies, the casting model being subdivided into contiguous regions with each region having terms in at least one of the objective functions for thermal conductivity, heat capacity and cooling time period, (b) populating the objective function terms with experimental data to calibrate the casting model, derive matching heat 1s transfer coefficients for each region, and simulate filling and solidification of the product within the dies, and (c) constraining the objective functions to ensure directional solidification along the series of contiguous sections while optimizing thermal conductivity and heat capacity and iteratively evaluating the constrained objective functions to indicate at least certain regions of the casting model whereby chills and cooling channels may be added, or insulation added to effect improved cycle time and/or casting quality.

摘要翻译： 在CAD产品模型定义的铸造金属制品的制造中优化循环时间和/或铸造质量的方法。 该方法包括以下步骤：（a）使用模拟CAD产品模型在模具内的填充和固化的目标函数来提供计算机铸造模型，铸造模型被细分为连续区域，每个区域具有至少一个 热导率，热容量和冷却时间的目标函数，（b）用实验数据填充目标函数项以校准铸造模型，导出每个区域的匹配热量1s转移系数，并模拟产品的填充和固化 （c）约束目标函数，以确保沿着该连续部分的一系列定向凝固，同时优化热导率和热容量，并迭代地评估受约束的目标函数，以指示铸造模型的至少某些区域，由此，冷却和冷却通道可以 添加或绝缘添加效果得到改善 循环时间和/或铸造质量。

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。