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    Methods of improving hot working productivity and corrosion resistance in AA7000 series aluminum alloys and products therefrom
    1.
    发明授权
    Methods of improving hot working productivity and corrosion resistance in AA7000 series aluminum alloys and products therefrom 失效
    提高AA7000系列铝合金及其制品的热加工生产率和耐腐蚀性的方法

    公开(公告)号：US06322647B1

    公开(公告)日：2001-11-27

    申请号：US09169293

    申请日：1998-10-09

    申请人： Rajeev G. Kamat ,  Subhasish Sircar

    发明人： Rajeev G. Kamat ,  Subhasish Sircar

    IPC分类号： C22C2100

    CPC分类号： C22F1/053

    摘要： 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.

    摘要翻译： 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。

    Method for shortening production time of heat treated aluminum alloys
    3.
    发明授权
    Method for shortening production time of heat treated aluminum alloys 失效
    缩短热处理铝合金生产时间的方法

    公开(公告)号：US07503986B2

    公开(公告)日：2009-03-17

    申请号：US10347948

    申请日：2003-01-21

    申请人： Rajeev G. Kamat ,  William D. Bennon ,  Shawn J. Murtha

    发明人： Rajeev G. Kamat ,  William D. Bennon ,  Shawn J. Murtha

    IPC分类号： C22F1/05

    CPC分类号： C22F1/047 ,  C22F1/04

    摘要： A method for producing a heat treated aluminum alloy product in a shortened period of time, the method comprising: (a) providing a heat treatable aluminum alloy; (b) working the heat treatable aluminum alloy at a solutionizing temperature to form a product; (c) first stage cooling the product to a critical temperature at which precipitation of second phase particles of the heat treatable aluminum alloy is negligible, wherein the first stage cooling comprises a first stage cooling rate from about 15° F. per second to about 100° F. per second; (d) second stage cooling the product to ambient temperature; (e) heating the product to an artificial aging temperature; and (f) artificially aging the product at the artificial aging temperature for a predetermined artificial aging time to form the heat treated aluminum alloy product.

    摘要翻译： 一种在缩短的时间内生产热处理的铝合金产品的方法，所述方法包括：（a）提供可热处理的铝合金; （b）在溶解温度下加工可热处理的铝合金以形成产品; （c）第一阶段冷却产物至可热处理的铝合金的第二相颗粒的沉淀可忽略的临界温度，其中第一阶段冷却包括从约15°F /秒至约100℃的第一阶段冷却速率 每秒°F; （d）第二阶段将产品冷却至环境温度; （e）将产品加热至人造老化温度; 和（f）在人造老化温度下人造老化预定的人造老化时间以形成热处理的铝合金产品。

    Method of making aluminum sheet product and product therefrom
    4.
    发明授权
    Method of making aluminum sheet product and product therefrom 失效
    制造铝板产品及其制品的方法

    公开(公告)号：US5480498A

    公开(公告)日：1996-01-02

    申请号：US246653

    申请日：1994-05-20

    申请人： Armand J. Beaudoin ,  J. Daniel Bryant ,  Alan J. Janousek ,  Rajeev G. Kamat ,  H. Edwin Oliver ,  Robert M. Ramage

    发明人： Armand J. Beaudoin ,  J. Daniel Bryant ,  Alan J. Janousek ,  Rajeev G. Kamat ,  H. Edwin Oliver ,  Robert M. Ramage

    IPC分类号： C22F1/04

    CPC分类号： C22F1/04

    摘要： A method of producing aluminum alloy sheet product includes casting a slab, homogenizing the cast slab, and hot rolling the homogenized slab to provide an intermediate gauge product. The temperature and other operating parameters of the hot rolling process are controlled so that the temperature of the intermediate gauge product exiting the hot rolling step is between about 500.degree. F. and 650.degree. F. Preferably, the temperature does not exceed 575.degree. F. The intermediate gauge product is then subjected to a cold reduction of 45% to 70%, annealed, and cold rolled to final gauge. The combination of controlling the hot rolling to provide a desired exit temperature of the intermediate gauge product and annealing prior to cold rolling to final gauge minimizes or eliminates the appearance of ridging or roping line defects in the aluminum sheet product when subjected to further straining in a forming or stamping operation. An improved aluminum alloy sheet product is produced having a superior surface finish for use in automotive components such as hoods or deck lids.

    摘要翻译： 制造铝合金板材的方法包括铸造板坯，均质铸造板坯，以及热轧均质板坯以提供中间量产品。 控制热轧工序的温度等操作参数，使得离开热轧工序的中间规格产品的温度在约500°F至650°F之间。优选温度不超过575°F。 然后将中等规格产品进行45％至70％的冷轧，退火，并冷轧至最终规格。 控制热轧以提供中等规格产品的期望出口温度和在冷轧之前退火至最终规格的组合使得当铝板产品中的进一步应变进一步应变时，铝板产品中的皱纹或线条缺陷的出现最小化或消除 成型或冲压作业。 制造改进的铝合金板产品，其具有用于汽车部件如罩或甲板盖的优异的表面光洁度。

    MULTI-ALLOY COMPOSITE SHEET FOR AUTOMOTIVE PANELS
    8.
    发明申请
    MULTI-ALLOY COMPOSITE SHEET FOR AUTOMOTIVE PANELS 审中-公开
    用于汽车面板的多合金复合板

    公开(公告)号：US20130068351A1

    公开(公告)日：2013-03-21

    申请号：US13616128

    申请日：2012-09-14

    申请人： Rajeev G. Kamat ,  John F. Butler, JR.

    发明人： Rajeev G. Kamat ,  John F. Butler, JR.

    IPC分类号： C22F1/04

    CPC分类号： C22F1/04 ,  B32B15/016 ,  C22C21/00 ,  C22C21/06 ,  C22F1/047 ,  Y10T428/12493

    摘要： Multi-alloy composite sheets and methods of producing the composite sheets for use in automotive applications are disclosed. The automotive application may include an automotive panel having a bi-layer or a tri-layer composite sheet with 3xxx and 6xxx aluminum alloys. The composite sheets may be produced by roll bonding or multi-alloy casting, among other techniques. Each of the composite sheets may demonstrate good flat hem rating and mechanical properties, long shelf life, and high dent resistance, among other properties.

    摘要翻译： 公开了多合金复合片材和用于汽车应用的复合片材的制造方法。 汽车应用可以包括具有双层或具有3xxx和6xxx铝合金的三层复合片的汽车面板。 复合片材可以通过辊压或多合金铸造等技术制造。 每个复合片材可以表现出良好的平均下摆等级和机械性能，长保质期和高耐凹陷性等特性。