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15 条记录 (耗时 0.016 秒)

    Process of preparing an iron-based powder in a gas-tight furnace
    3.
    发明授权
    Process of preparing an iron-based powder in a gas-tight furnace 有权
    在气密炉中制备铁基粉末的方法

    公开(公告)号：US06355087B1

    公开(公告)日：2002-03-12

    申请号：US09618725

    申请日：2000-07-18

    申请人： Johan Arvidsson ,  Ola Eriksson

    发明人： Johan Arvidsson ,  Ola Eriksson

    IPC分类号： B22F904

    CPC分类号： C22C33/0264 ,  B22F1/0085 ,  B22F1/0088 ,  B22F2999/00 ,  C21D3/02 ,  B22F9/082 ,  B22F2201/05 ,  C21D3/04

    摘要： The invention concerns a low pressure for the preparation of an iron-based, optionally alloyed powder comprising the steps of preparing a raw powder essentially consisting of iron and optionally at least one alloying element selected from the group consisting of chromium, manganese, copper, nickel, vanadium, niobium, boron, silicon, molybdenum and tungsten; charging a gas tight furnace with the powder in an essentially inert gas atmosphere and closing the furnace; increasing the furnace temperature; monitoring the increase of the formation of CO gas and evacuating gas from the furnace when a significant increase of the CO formation is observed and cooling the powder when the increase of the formation of CO gas diminishes.

    摘要翻译： 本发明涉及用于制备铁基，任选合金粉末的低压，包括以下步骤：制备基本上由铁组成的原料粉末和任选的至少一种选自铬，锰，铜，镍的合金元素 ，钒，铌，硼，硅，钼和钨; 在基本上惰性气体气氛中将粉末装入气密炉中并关闭炉子; 提高炉温; 当CO气体形成的显着增加被观察到时，监测CO气体形成的增加和从炉中排出气体的增加，并且当CO气体的形成增加时，粉末冷却。

    Recycling of tungsten carbides
    4.
    发明授权
    Recycling of tungsten carbides 失效
    回收碳化钨

    公开(公告)号：US08685137B2

    公开(公告)日：2014-04-01

    申请号：US13500313

    申请日：2010-10-26

    申请人： Johan Arvidsson

    发明人： Johan Arvidsson

    IPC分类号： C22B34/00

    CPC分类号： C21C7/00 ,  B22F3/001 ,  B22F8/00 ,  B22F9/22 ,  B22F2999/00 ,  C21C7/0006 ,  C21C7/0056 ,  C22B5/06 ,  C22B7/001 ,  C22B34/36 ,  C22C27/04 ,  C22C29/08 ,  C22C30/00 ,  C22C38/22 ,  Y02P10/214 ,  Y02P10/24 ,  Y02W30/541 ,  B22F2201/02 ,  B22F2201/013

    摘要： The invention relates to a process for producing an iron-and/or tungsten containing powder or powder agglomerate including the steps of: a) mixing at least a first powder fraction comprising a tungsten carbide containing powder, and at least a second powder fraction comprising an iron oxide powder and/or a tungsten oxide containing powder and optionally an iron powder, the weight of the first fraction being in the range of 50-90% by weight of the mix and the weight of the second fraction being in the range of 10-50% by weight of the mix, b) heating the mix of step a) to a temperature in the range of 400-1300° C., preferably 1000-1200° C. The invention also relates to an iron-and/or tungsten containing powder or powder agglomerate.

    摘要翻译： 本发明涉及一种生产含铁和/或钨的粉末或粉末附聚物的方法，包括以下步骤：a）将包含含碳化钨的粉末的至少第一粉末部分和至少包含第 氧化铁粉末和/或含氧化钨粉末和任选的铁粉末，第一部分的重量在混合物的50-90重量％的范围内，第二部分的重量在10 -50重量％的混合物，b）将步骤a）的混合物加热至400-1300℃，优选1000-1200℃的温度。本发明还涉及铁和/或 含钨粉末或粉末附聚物。

    Agglomerated iron-based powders
    5.
    发明授权
    Agglomerated iron-based powders 有权
    聚集铁基粉末

    公开(公告)号：US6120575A

    公开(公告)日：2000-09-19

    申请号：US325348

    申请日：1999-06-04

    申请人： Johan Arvidsson ,  Fredrik Emilsson

    发明人： Johan Arvidsson ,  Fredrik Emilsson

    IPC分类号： C22C33/02 ,  B22F1/00

    CPC分类号： C22C33/0221 ,  B22F2998/00

    摘要： The invention concerns a process for the preparation of a free flowing agglomerated iron-based powder comprising mixing dry ingredients of: a) 63-95% by weight of a fine base powder consisting essentially of iron and having a particle size essentially less than 75 .mu.m; b) 5-20% by weight of a lubricating phase having a particle size essentially less than 120 .mu.m, preferably less than 60 .mu.m; c) 0-15% by weight of a hard phase material having a particle size essentially less than 10 .mu.m; and d) 0-7% of additives in a mixing chamber; evacuating the mixing chamber; filling the mixing chamber with an insert gas, mixing the ingredients with at most 1% by weight of a binding agent, and adding a solvent and drying the obtained powder.

    摘要翻译： 本发明涉及一种制备自由流动的团聚铁基粉末的方法，其包括混合以下干燥成分的干成分：a）63-95重量％的基本上由铁组成并且具有基本上小于75μm的粒度的细基础粉末 m; b）5-20重量％的粒径基本上小于120μm，优选小于60μm的润滑相; c）0-15重量％的具有基本上小于10μm的粒度的硬相材料; 和d）混合室中的0-7％的添加剂; 抽空混合室; 用插入气体填充混合室，将成分与至多1重量％的粘合剂混合，并加入溶剂并干燥所得粉末。

    RECYCLING OF TUNGSTEN CARBIDES
    6.
    发明申请
    RECYCLING OF TUNGSTEN CARBIDES 失效
    铁素体的回收

    公开(公告)号：US20120251380A1

    公开(公告)日：2012-10-04

    申请号：US13500313

    申请日：2010-10-26

    申请人： Johan Arvidsson

    发明人： Johan Arvidsson

    IPC分类号： C22C27/04 ,  B22F9/20

    CPC分类号： C21C7/00 ,  B22F3/001 ,  B22F8/00 ,  B22F9/22 ,  B22F2999/00 ,  C21C7/0006 ,  C21C7/0056 ,  C22B5/06 ,  C22B7/001 ,  C22B34/36 ,  C22C27/04 ,  C22C29/08 ,  C22C30/00 ,  C22C38/22 ,  Y02P10/214 ,  Y02P10/24 ,  Y02W30/541 ,  B22F2201/02 ,  B22F2201/013

    摘要： The invention relates to a process for producing an iron-and/or tungsten containing powder or powder agglomerate including the steps of: a) mixing at least a first powder fraction comprising a tungsten carbide containing powder, and at least a second powder fraction comprising an iron oxide powder and/or a tungsten oxide containing powder and optionally an iron powder, the weight of the first fraction being in the range of 50-90% by weight of the mix and the weight of the second fraction being in the range of 10-50% by weight of the mix, b) heating the mix of step a) to a temperature in the range of 400-1300° C., preferably 1000-1200° C. The invention also relates to an iron-and/or tungsten containing powder or powder agglomerate.

    摘要翻译： 本发明涉及一种生产含铁和/或钨的粉末或粉末附聚物的方法，包括以下步骤：a）将包含含碳化钨的粉末的至少第一粉末部分和至少包含第 氧化铁粉末和/或含氧化钨粉末和任选的铁粉末，第一部分的重量在混合物的50-90重量％的范围内，第二部分的重量在10 -50重量％的混合物，b）将步骤a）的混合物加热至400-1300℃，优选1000-1200℃的温度。本发明还涉及铁和/或 含钨粉末或粉末附聚物。

    DC/DC converter
    7.
    发明授权
    DC/DC converter 有权
    DC / DC转换器

    公开(公告)号：US06963302B2

    公开(公告)日：2005-11-08

    申请号：US10746263

    申请日：2003-12-29

    申请人： Johan Arvidsson

    发明人： Johan Arvidsson

    IPC分类号： G01S7/282 ,  H02M3/157 ,  G01S7/28

    CPC分类号： H02M3/157 ,  G01S7/282

    摘要： A method of controlling a switching element in a switching regulator power supply of a radar. The method of controlling the switching element comprises only switching the switching element during predetermined time intervals, the predetermined time intervals advantageously being sample intervals of a pulse repetition interval of the radar. Thereby by having knowledge of the time intervals the switching element is switching, being able to remove or diminish any influence the switching can have on the quality of received signals and subsequent processing of these signals.

    摘要翻译： 一种控制雷达开关调节器电源中的开关元件的方法。 控制开关元件的方法包括仅在预定时间间隔内切换开关元件，预定时间间隔有利地是雷达的脉冲重复间隔的采样间隔。 因此，通过了解开关元件切换的时间间隔，能够消除或减少切换对接收信号的质量和这些信号的后续处理的任何影响。

    Method of preparing sintered products having high tensile strength and high impact strength
    8.
    发明授权
    Method of preparing sintered products having high tensile strength and high impact strength 失效
    制备具有高拉伸强度和高冲击强度的烧结产品的方法

    公开(公告)号：US06261514B1

    公开(公告)日：2001-07-17

    申请号：US09584104

    申请日：2000-05-31

    申请人： Caroline Lindberg ,  Johan Arvidsson

    发明人： Caroline Lindberg ,  Johan Arvidsson

    IPC分类号： B22F312

    CPC分类号： C22C33/0264 ,  C22C33/02

    摘要： The invention concerns a method of preparing sintered products having high tensile strength and high impact strength comprising the steps of forming a mixture by mixing an iron powder including 1-4% by weight of Cr, 0.2-0.8% by weight of Mo 0.09-0.3% by weight % of Mn, less than 0.01% of C, less than 0.25% by weight of O, 0-1.2% of graphite, a high temperature lubricant and optionally an organic binder; preparing a heated powder composition by heating the mixture to a temperature above ambient temperature; transferring the heated powder composition to a preheated die; forming a compacted body by compacting the heated powder composition in the die at an elevated temperature; and forming a sintered product by sintering the compacted body at a temperature of at least 1220° C.

    摘要翻译： 本发明涉及一种制备具有高拉伸强度和高冲击强度的烧结产品的方法，包括以下步骤：通过将包含1-4重量％的Cr，0.2-0.8重量％的Mo 0.09-0.3的铁粉混合来形成混合物 Mn的重量％，小于0.01％的C，小于0.25重量％的O，0-1.2％的石墨，高温润滑剂和任选的有机粘合剂; 通过将混合物加热至高于环境温度的温度来制备加热的粉末组合物; 将加热的粉末组合物转移到预热模具中; 通过在升高的温度下压缩模具中的加热的粉末组合物来形成压实体; 并通过在至少1220℃的温度下烧结压实体来形成烧结产品。

    Powder composition
    10.
    发明授权
    Powder composition 有权

    公开(公告)号：US06436166B1

    公开(公告)日：2002-08-20

    申请号：US09768603

    申请日：2001-01-25

    申请人： Johan Arvidsson ,  Hilmar Vidarsson

    发明人： Johan Arvidsson ,  Hilmar Vidarsson

    IPC分类号： B22F100

    摘要： The present invention concerns powder compositions including iron-containing powders, additives, lubricant and flow agents. The powder compositions essentially consist of iron-containing particles having additive particles bonded thereto by a molten and subsequently solidified lubricant for the formation of aggregate particles and from about 0.005 to about 2 percent by weight of a flow agent having a particle size below 200 nanometers.