公开(公告)号：US4940384A

公开(公告)日：1990-07-10

申请号：US309613

申请日：1989-02-10

申请人： Lutfi H. Amra ,  Thomas M. Byrne, Jr. ,  Harvey Martin ,  George S. Mordue ,  David V. Neff

发明人： Lutfi H. Amra ,  Thomas M. Byrne, Jr. ,  Harvey Martin ,  George S. Mordue ,  David V. Neff

IPC分类号： B01D29/11 ,  B01D35/02 ,  C22B9/02 ,  F04D7/06 ,  F04D29/70 ,  F27D27/00

CPC分类号： F04D7/065 ,  F04D29/708

摘要： A molten metal pump includes a filter that prevents ingestion of foreign material such as dross from molten metal within which the pump is immersed. The filter is a large structure that is secured to the base of the pump surrounding the pump's inlet. The filter forms a cavity adjacent the pump's inlet. The ratio of the surface area of the filter to the inlet area of the pump is very large; the filter has a low porosity while maintaining a high flow rate for the pump.

公开(公告)号：US4617232A

公开(公告)日：1986-10-14

申请号：US368700

申请日：1982-04-15

申请人： Richard C. Chandler ,  Lutfi H. Amra

发明人： Richard C. Chandler ,  Lutfi H. Amra

IPC分类号： C04B41/85 ,  C04B41/52 ,  C04B41/87 ,  C04B41/89 ,  F04B15/04 ,  B32B5/16 ,  B32B9/00

CPC分类号： C04B41/009 ,  C04B41/52 ,  C04B41/89 ,  F04B15/04 ,  Y10T428/25 ,  Y10T428/256 ,  Y10T428/30

摘要： The invention provides a composite carbon or graphite having desirable properties such as corrosion and wear resistance. The invention combines a graphite substrate with a protective porous zone of silicon carbide. The whole body of graphite plus silicon carbide then is infiltrated with aluminum phosphate. An adhered barrier of silicon carbide, ranging in thickness between 0.015 and 0.050 inch thick is integrated with a graphite stratum to form a very hard surface, resistant to mechanical and chemical wear. The silicon carbide barrier is closely compatible to the graphite substrate, in resistance to thermal shock and in qualities of thermal expansion. In order to improve oxidation resistance further, a new composition was formed by infiltrating aluminum phosphate through the silicon carbide into the graphite to form a single body of composite graphite.

摘要翻译： 本发明提供具有所需性质如耐腐蚀性和耐磨性的复合碳或石墨。 本发明将石墨基底与碳化硅的保护性多孔区组合在一起。 然后将全体石墨加碳化硅浸入磷酸铝中。 厚度在0.015和0.050英寸之间的碳化硅粘附屏障与石墨层结合在一起形成非常硬的表面，耐机械和化学磨损。 碳化硅阻挡层与石墨基材密切相容，耐热冲击性和热膨胀性。 为了进一步提高抗氧化性，通过将磷酸铝通过碳化硅渗透到石墨中形成复合石墨的单体而形成新的组合物。

公开(公告)号：US6050723A

公开(公告)日：2000-04-18

申请号：US59923

申请日：1998-04-14

申请人： Lutfi H. Amra

发明人： Lutfi H. Amra

IPC分类号： G01K1/10 ,  G01K1/12

CPC分类号： G01K1/105

摘要： A high temperature long life thermocouple assembly for measuring continuous molten metal temperatures is made from thermocouple protection tube of insulating materials fabricated by rolling to form an open ended tube which resists attack of molten metals by dissolution and oxidation. The tube is plugged from one end, which is the sensing end of the thermocouple, with a plug made of a different material than the tube body and is cemented to the tube. The cement used is a special high temperature mortar which adheres to the plug and the tube. The plug is made of special graphite by infiltrating into it certain corrosion salt inhibitors. When assembled the tube encases the thermocouple protecting it from dissolution and failure upon immersion in molten metal. This device makes it feasible to monitor continuously for days the temperature of molten metals and alloys, in corrosive atmospheres at temperatures as high as 2820.degree. F. The durability and life of the tube is attainable because the tube's resistance to molten metals and its light weight.

摘要翻译： 用于测量连续熔融金属温度的高温长寿命热电偶组件由通过轧制制成的绝缘材料的热电偶保护管制成，以形成开口管，其通过溶解和氧化来抵抗熔融金属的侵蚀。 管从一端（其是热电偶的感测端）插入，具有由与管体不同的材料制成的塞子，并且与管道胶合。 使用的水泥是一种特殊的高温砂浆，其粘附到塞子和管子上。 塞子由特殊的石墨制成，渗入其中一定的腐蚀盐抑制剂。 当组装时，管包裹热电偶，防止其浸入熔融金属时溶解和失效。 该设备可以在高达2820°F的腐蚀性环境中连续监测熔融金属和合金的温度几天。管的耐久性和寿命是可以实现的，因为管对熔融金属的抵抗力和重量轻 。

公开(公告)号：US4621017A

公开(公告)日：1986-11-04

申请号：US586297

申请日：1984-03-05

申请人： Richard C. Chandler ,  Lutfi H. Amra

发明人： Richard C. Chandler ,  Lutfi H. Amra

IPC分类号： C04B41/52 ,  C04B41/89 ,  F04B15/04 ,  B32B5/16 ,  B32B9/00

CPC分类号： F04B15/04 ,  C04B41/52 ,  C04B41/89 ,  Y10T428/256 ,  Y10T428/30

摘要： The invention provides a composite carbon or graphite having desirable properties such as corrosion and wear resistance. The invention combines a graphite substrate with a protective porous zone of silicon carbide. The whole body of graphite plus silicon carbide then is infiltrated with aluminum phosphate. An adhered barrier of silicon carbide, ranging in thickness between 0.015 and 0.050 inch thick is integrated with a graphite stratum to form a very hard surface, resistant to mechanical and chemical wear. The silicon carbide barrier is closely compatible to the graphite substrate, in resistance to thermal shock and in qualities of thermal expansion. In order to improve oxidation resistance further, a new composition was formed by infiltrating aluminum phosphate through the silicon carbide into the graphite to form a single body of composite graphite.

摘要翻译： 本发明提供具有所需性质如耐腐蚀性和耐磨性的复合碳或石墨。 本发明将石墨基底与碳化硅的保护性多孔区组合在一起。 然后将全体石墨加碳化硅浸入磷酸铝中。 厚度在0.015和0.050英寸之间的碳化硅粘附屏障与石墨层结合在一起形成非常硬的表面，耐机械和化学磨损。 碳化硅阻挡层与石墨基材密切相容，耐热冲击性和热膨胀性。 为了进一步提高抗氧化性，通过将磷酸铝通过碳化硅渗透到石墨中形成复合石墨的单体而形成新的组合物。