公开(公告)号：US06458224B1

公开(公告)日：2002-10-01

申请号：US09564053

申请日：2000-05-03

Applicant: Baolute Ren ,  Subhasish Sircar ,  William A. Cassada, III

Inventor： Baolute Ren ,  Subhasish Sircar ,  William A. Cassada, III

IPC: C22C2100

CPC classification number: C22C21/00 ,  F28F21/08

Abstract: An aluminum alloy article containing the alloying amounts of iron, silicon, manganese, titanium, and zinc has controlled levels of iron and manganese to produce an alloy article that combines excellent corrosion resistant with good formability. The alloy article composition employs a controlled ratio of manganese to iron and controlled total amounts of iron and manganese to form intermetallic compounds in the final alloy article. The electrolytic potential of the intermetallic compounds match the aluminum matrix of the article to minimize corrosion. The levels of iron and manganese are controlled so that the intermetallic compounds are present in a volume fraction that allows the alloy article to be easily formed. The aluminum alloy composition is especially adapted for extrusion processes, and tubing that are used in heat exchanger applications.

Abstract translation: 含有铁，硅，锰，钛和锌的合金量的铝合金制品控制了铁和锰的含量，从而生产出具有优良耐腐蚀性和良好成型性的合金制品。 合金制品组合物采用锰与铁的控制比例，并控制铁和锰的总量，以在最终的合金制品中形成金属间化合物。 金属间化合物的电解电位与制品的铝基体相匹配，以使腐蚀最小化。 控制铁和锰的含量，使得金属间化合物以允许合金制品容易形成的体积分数存在。 铝合金组合物特别适用于挤出工艺，以及用于热交换器应用的管材。

公开(公告)号：US06409966B1

公开(公告)日：2002-06-25

申请号：US09576813

申请日：2000-05-23

Applicant: Subhasish Sircar

Inventor： Subhasish Sircar

IPC: C22C2100

CPC classification number: C22C21/003

Abstract: One free machining aluminum alloy includes bismuth as a free machining elemental constituent that functions as a discontinuity in the aluminum alloy matrix rather than a low melting point compound. Using bismuth in weight percents of the total composition ranging between 0.1% and 3.0% improves both machinability and mechanical properties. The bismuth can act as a substitute for another free machining constituent in a free machining aluminum alloy or can be added to an aluminum alloy to improve its machinability. Another free machining aluminum alloy has bismuth and tin as free machining constituents for improved machining. When using bismuth and tin, the bismuth ranges between 0.1 and 3.0% by weight and the tin ranges between 0.1 and 1.5% by weight.

Abstract translation: 一种自由加工铝合金包括作为铝合金基体而不是低熔点化合物的不连续性的自由加工元素成分的铋。 使用铋的总成分的重量百分比范围在0.1％至3.0％之间，提高了机械加工性能和机械性能。 铋可以作为自由加工铝合金中的另一种自由加工成分的替代物，或者可以添加到铝合金中以提高其可加工性。 另一种自由加工铝合金具有铋和锡作为自由加工成分，用于改进加工。 当使用铋和锡时，铋的含量范围为0.1至3.0重量％，锡的范围为0.1至1.5重量％。

公开(公告)号：US06322647B1

公开(公告)日：2001-11-27

申请号：US09169293

申请日：1998-10-09

Applicant: Rajeev G. Kamat ,  Subhasish Sircar

Inventor： Rajeev G. Kamat ,  Subhasish Sircar

IPC: C22C2100

CPC classification number: C22F1/053

Abstract: Methods of improving the corrosion resistance and hot working productivity of AA7000 series aluminum alloys include, in one mode, the steps of treating a stock material to form a globular microstructure, preferably by a thermal conversion treatment, and subsequently hot working the treated stock material, quenching it and aging it. The globular microstructure permits increasing the hot working rate to attain T6 properties using only a T5 temper practice and without adverse effect on the surface of the hot worked product as a result of the increased hot working rate. Consequently, an acceptable product is made at a significantly lower cost due to the increased hot working rates and fewer processing steps. The method also improves the corrosion resistance, particularly exfoliation corrosion resistance, of the product such that corrosion resistance generally attainable using only a T7 temper practice is achieved using only a T5 temper practice.

Abstract translation: 提高AA7000系列铝合金的耐腐蚀性和热加工性的方法包括在一种模式中，优选通过热转化处理，然后热处理经处理的原料，处理原料以形成球形微观结构的步骤， 淬火并老化。 球状微结构允许通过仅使用T5回火实践提高热加工速率以获得T6性能，并且由于热加工速率的增加而对热加工产品的表面没有不利影响。 因此，由于增加的热加工速率和较少的加工步骤，可接受的产品以显着较低的成本制造。 该方法还提高了产品的耐腐蚀性，特别是耐剥离腐蚀性，使得仅使用T5回火实践即可实现仅使用T7回火实践的耐腐蚀性。

公开(公告)号：US5785776A

公开(公告)日：1998-07-28

申请号：US659788

申请日：1996-06-06

Applicant: Subhasish Sircar

Inventor： Subhasish Sircar

IPC: C22C21/00 ,  C22F1/00 ,  C22F1/04

CPC classification number: C22F1/04

Abstract: A method of improving the corrosion properties of an aluminum alloy product containing solid solution alloying elements includes the step of rapidly quenching the alloy product after it has been heated or hot deformed so as to maintain the alloying elements in solid solution to avoid microsegregation of the solid solution alloying elements and minimize preferential sites for corrosion onset.

Abstract translation: 一种改善含有固溶体合金元素的铝合金产品的腐蚀性能的方法包括在加热或热变形之后快速淬火合金产品以便将合金元素保持在固溶体中以避免固体的微分离的步骤 溶液合金元素，并最小化腐蚀发生的优先位置。

公开(公告)号：US5730198A

公开(公告)日：1998-03-24

申请号：US469291

申请日：1995-06-06

Applicant: Subhasish Sircar

Inventor： Subhasish Sircar

IPC: C22C1/00 ,  B22D18/02 ,  B22D23/00

CPC classification number: C22C1/005 ,  Y10S164/90

Abstract: A temperature profile is determined of a metal sample for the metal to be converted to establish a temperature range indicative of a partially solid and partially liquid state of the metal. With this temperature profile, a metal preform is heated at a controlled rate from a temperature below the temperature range to a temperature within the range defined by the temperature profile to achieve a select percent by volume of liquid in the metal. This controlled heating to a desired temperature, which may be at a uniform rate, followed by holding at the desired temperature, thermally converts a dendritic structure of the material into a globular structure. The thermally converted metal preform is then recovered for subsequent use such as shaping into a desired article.

Abstract translation: 确定要转化的金属的金属样品的温度分布，以建立指示金属的部分固体和部分液态的温度范围。 利用该温度曲线，金属预成型件以受控的速率从低于温度范围的温度加热到由温度分布限定的范围内的温度，以实现金属中液体的选择体积百分数。 将其控制加热到所需温度，其可以以均匀的速率，然后保持在所需温度，将材料的树枝状结构热转化为球状结构。 然后回收热转换的金属预制件用于随后的使用，例如成型成所需的制品。

公开(公告)号：US5725694A

公开(公告)日：1998-03-10

申请号：US756302

申请日：1996-11-25

Applicant: Subhasish Sircar

Inventor： Subhasish Sircar

IPC: C22C21/00

CPC classification number: C22C21/003

Abstract: A free-machining alloy is disclosed containing bismuth, tin and indium. The free-machining constituents act as low melting point compounds for machining and are specially adapted for use in aluminum alloys such as AA6000 series and AA 2000 series alloys. The bismuth, tin and indium are effective replacements for the lead and bismuth addition used previously to improve machinability.

Abstract translation: 公开了一种含有铋，锡和铟的自由加工合金。 自由加工成分用作机械加工的低熔点化合物，特别适用于铝合金如AA6000系列和AA 2000系列合金。 铋，锡和铟是以前用于提高机械加工性的铅和铋添加剂的有效替代品。

公开(公告)号：US06315947B1

公开(公告)日：2001-11-13

申请号：US09576897

申请日：2000-05-23

Applicant: Subhasish Sircar

Inventor： Subhasish Sircar

IPC: C22C2100

CPC classification number: C22C21/003 ,  C22C21/08

Abstract: A free-machining alloy is disclosed containing bismuth and indium. The free-machining constituents act as low melting point compounds for machining and are specially adapted for use in aluminum alloys such as AA6000 series and AA 2000 series alloys. The bismuth and indium are effective replacements for the lead and bismuth addition used previously to improve machinability while providing a high impact energy free machining alloy.

Abstract translation: 公开了一种含有铋和铟的自由加工合金。 自由加工成分用作机械加工的低熔点化合物，特别适用于铝合金如AA6000系列和AA 2000系列合金。 铋和铟是先前用于提高机械加工性同时提供高抗冲击能量的加工合金的铅和铋添加剂的有效替代品。