公开(公告)号：US20050129563A1

公开(公告)日：2005-06-16

申请号：US10733193

申请日：2003-12-11

申请人： Ryan Sun ,  Kai Xu ,  Dan Matthews

发明人： Ryan Sun ,  Kai Xu ,  Dan Matthews

IPC分类号： F02B39/00 ,  B22F3/00 ,  B22F3/02 ,  B22F3/12 ,  B22F3/16 ,  B22F3/23 ,  B22F5/02 ,  B22F5/10 ,  C22C33/02 ,  C22C38/00 ,  C22C38/34 ,  F02B37/24

CPC分类号： C22C33/0285 ,  B22F2998/00 ,  B22F2998/10 ,  B22F2999/00 ,  B22F5/02 ,  B22F3/02 ,  B22F3/10 ,  B22F3/1007 ,  B22F2201/013 ,  B22F2201/02 ,  B22F2201/20

摘要： A method of producing parts from powdered metal comprising the steps of providing a metallurgic powder comprising iron, 0-0.6 weight percent carbon, 0.5-5.0 weight percent silicon, 0.5-6.0 weight percent nickel, 0.5-1.5 weight percent molybdenum, 0-0.7 weight percent manganese, and 12-20 weight percent chromium, the weight percentages calculated based on the total weight of the powder. Secondly, the powders are compressed at a pressure of 35 to 65 tsi to provide a green compact. Then, the compact is heated in an atmosphere to a temperature of 2100° F. to 2400° F. for 20 to 90 minutes, such that the resulting microstructure of the compact is either single phase ferritic or dual phase ferritic and austenitic.

摘要翻译： 一种从粉末金属制备零件的方法，包括以下步骤：提供包含铁，0-0.6重量％碳，0.5-5.0重量％硅，0.5-6.0重量％镍，0.5-1.5重量％钼，0-0.7 重量百分比的锰和12-20重量％的铬，基于粉末的总重量计算的重量百分比。 其次，在35〜65tsi的压力下压粉，得到生坯。 然后，将该压块在气氛中加热到2100°F至2400°F的温度20至90分钟，使得压块的所得微结构为单相铁素体或双相铁素体和奥氏体。

公开(公告)号：US20060182648A1

公开(公告)日：2006-08-17

申请号：US11382295

申请日：2006-05-09

申请人： Kai Xu ,  Ryan Sun

发明人： Kai Xu ,  Ryan Sun

IPC分类号： B22F1/00 ,  B22F1/02

CPC分类号： C22C33/0264 ,  B22F3/16 ,  B22F2003/247 ,  B22F2003/248 ,  B22F2998/10 ,  B22F2999/00 ,  B22F3/20 ,  B22F3/18 ,  B22F3/17 ,  B22F3/02 ,  B22F3/10 ,  B22F1/0085

摘要： A powder metal part is made by compaction at room temperature or an elevated temperature followed by sintering, a secondary densification, heat treating, and optional secondary operations. The particulate materials preferably include iron, 0-2.0 wt % copper, 0.15-0.9 wt % carbon, 0.5-2.0 wt % molybdenum, 0.5-4.5 wt % nickel, 0-4.0 wt % chromium, and 0-1.5 wt % silicon. At least one secondary densification is applied to the part after compaction and pre-sinter/sinters steps to achieve medium to high density. The secondary densification is part of a double-press double-sinter (DPDS) or is a mechanical working depending on the application requirements. The powder metal is heat treated by austempering or marquenching followed by tempering. A unique composite microstructure is achieved from austempering by controlling the powder chemistry and the holding time at an elevated temperature. The combination of a secondary densification and austempering or marquenching produces a high performance powder metal part for demanding applications.

摘要翻译： 粉末金属部件通过在室温或升高的温度下压实制备，然后进行烧结，二次致密化，热处理和任选的二次操作。 颗粒材料优选包括铁，0-2.0重量％铜，0.15-0.9重量％碳，0.5-2.0重量％钼，0.5-4.5重量％镍，0-4.0重量％铬和0-1.5重量％硅。 在压实和预烧结/烧结步骤之后，至少一种二次致密化被施加到部件上以实现中等到高密度。 二次致密化是双压双烧结（DPDS）的一部分，或根据应用要求进行机械加工。 粉末金属通过奥氏体淬火或淬火进行热处理，随后进行回火处理。 通过控制粉末化学和在高温下的保持时间，通过奥氏体回火实现独特的复合微观结构。 二次致密化和奥氏体淬火或捣碎的组合产生高性能粉末金属部件，用于要求苛刻的应用。

公开(公告)号：US07235201B2

公开(公告)日：2007-06-26

申请号：US11017013

申请日：2004-12-20

申请人： Edwin Scott Hicklen ,  Sean Kuplen ,  Kai Xu ,  Ryan Sun

发明人： Edwin Scott Hicklen ,  Sean Kuplen ,  Kai Xu ,  Ryan Sun

IPC分类号： B29C43/04

CPC分类号： B22F3/03

摘要： A device to compact parts out of powder material including a top die and a bottom die movable with respect to each other from an open position to a closed position, at least one punch associated with each of said dies for relative movement between the die and associated punch, said bottom die and bottom punch movable to positions defining a cavity substantially within said top die for receiving powder therein, said bottom punch and said top and bottom dies being relatively movable to draw powder down into a portion of said cavity adjacent the bottom die that is formed due to said relative movement, said top and bottom punches being movable toward each other to compact the powder and form the part, said top and bottom dies being separable to eject the part. Relative movement of the top and bottom die and bottom punch may take place during filling of the cavity with powder. Alternatively, relative movement may take place after the completion of filling the cavity adjacent the top die with sufficient powder to fill the part.

摘要翻译： 一种用于从粉末材料压实部件的装置，包括可以从打开位置到关闭位置相对于彼此移动的顶模和底模，至少一个与所述模具中的每一个相关联的冲头，用于模具和相关联的相对运动之间的相对运动 所述底模和底冲头可移动到限定基本上在所述顶模内的空腔的位置，用于在其中接收粉末，所述底冲头和所述顶模和下模具相对移动以将粉末向下拉入与所述底模相邻的所述腔的一部分 由于所述相对运动而形成，所述顶部和底部冲头可相对于彼此移动以压实粉末并形成所述部件，所述顶部和底部模具可分离以弹出所述部件。 顶部和底部模具和底部冲头的相对运动可以在用粉末填充空腔期间发生。 或者，相对运动可以在用足够的粉末填充部分附近的顶部模具填充完成之后发生。

公开(公告)号：US20070048169A1

公开(公告)日：2007-03-01

申请号：US11211220

申请日：2005-08-25

申请人： Ryan Sun ,  Kai Xu ,  Sean Kuplen ,  Scott Hicklen

发明人： Ryan Sun ,  Kai Xu ,  Sean Kuplen ,  Scott Hicklen

IPC分类号： B22F3/24

CPC分类号： C22C33/0264 ,  B22F2998/10 ,  B22F3/02 ,  B22F3/10 ,  B22F2003/248 ,  B22F3/164 ,  B22F2003/241 ,  B22F2003/247

摘要： A method of producing parts from powdered metal having a first step of providing a powder, which is compressed at a pressure of 25 to 65 tsi to provide a green compact. The compact is then sintered at 2000° F. to 2400° F. for 20 to 60 minutes and cooled. After the compact has been cooled, the density of the compact is increased to greater than 7.4 g/cc. The compact is austenitized in an atmosphere of gas containing propane and a carbon potential of 0.8%. In one embodiment, the gas also contains ammonia. The compact is heated in the atmosphere at a temperature of 1600° F. for 40 minutes. Immediately following the heating, the compact is quenched in oil a temperature between 120° F. and 150° F. for 10 to 15 minutes. Lastly the compact is tempered at a temperature between 300° F. and 1000° F. for 30 to 90 minutes.

摘要翻译： 一种从粉末状金属制造零件的方法，该方法具有第一步，提供粉末，其压力为25至65tsi，以提供生坯。 然后将该压块在2000°F下烧结至2400°F，持续20至60分钟并冷却。 在压块已经冷却之后，压块的密度增加到大于7.4g / cc。 该压实体在含有丙烷的气体和0.8％的碳势的气氛中奥氏体化。 在一个实施方案中，气体还含有氨。 将该压块在大气中在1600°F的温度下加热40分钟。 在加热之后，紧凑件在油中在120°F和150°F之间的温度下淬火10至15分钟。 最后，将压坯在300°F至1000°F之间的温度下回火30至90分钟。

公开(公告)号：US20060131775A1

公开(公告)日：2006-06-22

申请号：US11017013

申请日：2004-12-20

申请人： Edwin Hicklen ,  Sean Kuplen ,  Kai Xu ,  Ryan Sun

发明人： Edwin Hicklen ,  Sean Kuplen ,  Kai Xu ,  Ryan Sun

IPC分类号： B22F3/03

CPC分类号： B22F3/03

摘要： A device to compact parts out of powder material including a top die and a bottom die movable with respect to each other from an open position to a closed position, at least one punch associated with each of said dies for relative movement between the die and associated punch, said bottom die and bottom punch movable to positions defining a cavity substantially within said top die for receiving powder therein, said bottom punch and said top and bottom dies being relatively movable to draw powder down into a portion of said cavity adjacent the bottom die that is formed due to said relative movement, said top and bottom punches being movable toward each other to compact the powder and form the part, said top and bottom dies being separable to eject the part. Relative movement of the top and bottom die and bottom punch may take place during filling of the cavity with powder. Alternatively, relative movement may take place after the completion of filling the cavity adjacent the top die with sufficient powder to fill the part.

摘要翻译： 一种用于从粉末材料压实部件的装置，包括可以从打开位置到关闭位置相对于彼此移动的顶模和底模，至少一个与所述模具中的每一个相关联的冲头，用于模具和相关联的相对运动之间的相对运动 所述底模和底冲头可移动到限定基本上在所述顶模内的空腔的位置，用于在其中接收粉末，所述底冲头和所述顶模和下模具相对移动以将粉末向下拉入与所述底模相邻的所述腔的一部分 由于所述相对运动而形成，所述顶部和底部冲头可相对于彼此移动以压实粉末并形成所述部件，所述顶部和底部模具可分离以弹出所述部件。 顶部和底部模具和底部冲头的相对运动可以在用粉末填充空腔期间发生。 或者，相对运动可以在用足够的粉末填充部分附近的顶部模具填充完成之后发生。

公开(公告)号：US20050163645A1

公开(公告)日：2005-07-28

申请号：US10766154

申请日：2004-01-28

申请人： Kai Xu ,  Ryan Sun

发明人： Kai Xu ,  Ryan Sun

IPC分类号： B22F3/10 ,  B22F3/00 ,  B22F3/12 ,  B22F3/16 ,  B22F3/24 ,  B22F5/08 ,  C22C33/02 ,  C22C38/00 ,  F16H55/06

CPC分类号： B22F3/16 ,  B22F3/24 ,  B22F5/08 ,  B22F2003/247 ,  B22F2003/248 ,  B22F2998/10 ,  B22F3/02 ,  B22F3/10

摘要： A method of producing parts from powdered metals is disclosed, comprising the following steps. A metallurgical powder is provided, consisting of iron, 0.3-1.0 weight percent carbon, 0-4 weight percent chromium, 0-3 weight percent copper, 0.5-1.5 weight percent molybdenum, 0.5-4.5 weight percent nickel, 0-1.0 weight percent manganese, and 0-1.5 weight percent silicon. Metal powders are made by atomization and mixing. The powder metal parts are made by compacting, pre-sintering, profile/form grinding, sinter furnace hardening, and secondary operations. Profile/form grinding generates profiles, which can not be formed by compaction tooling, such as undercut. The specific pre-sinter cycle makes parts strong enough for profile grinding with prolonged tool life. Powder metal parts made by this invention are also disclosed.

摘要翻译： 公开了一种从粉末状金属制备零件的方法，包括以下步骤。 提供了一种冶金粉末，其由铁，0.3-1.0重量％碳，0-4重量％铬，0-3重量％铜，0.5-1.5重量％钼，0.5-4.5重量％镍，0-1.0重量％ 锰和0-1.5重量％的硅。 金属粉末通过雾化和混合制成。 粉末金属部件通过压实，预烧结，轮廓/形状研磨，烧结炉硬化和二次操作制成。 轮廓/成型研磨产生不能通过压实模具形成的轮廓，例如底切。 具体的预烧结循环使零件具有足够的外形磨削，延长刀具寿命。 还公开了由本发明制成的粉末金属部件。

公开(公告)号：US20050123432A1

公开(公告)日：2005-06-09

申请号：US10983554

申请日：2004-11-08

申请人： Ryan Sun ,  Kai Xu

发明人： Ryan Sun ,  Kai Xu

IPC分类号： B22F5/08 ,  B22F1/00 ,  B22F3/10 ,  B22F3/16 ,  B22F3/24 ,  C22C1/04 ,  C22C33/02 ,  C22C38/00

CPC分类号： C22C33/02 ,  B22F3/1017 ,  B22F2003/248 ,  B22F2998/00 ,  B22F2998/10 ,  C22C33/0264 ,  B22F3/16 ,  B22F5/08 ,  B22F3/24 ,  B22F3/02 ,  B22F3/10

摘要： A method of producing parts from powdered metal comprising the steps of providing a metallurgic powder, compressing the powder at a pressure of 25 to 65 tsi to provide a green compact with a density if 6.4 g/cc to 7.4 g/cc. The compact is then high temperature sintered at a temperature of 2100° F. to 2400° F. for 20 to 60 minutes or regularly sintered at a temperature of 1650° F. to 2400° F. for 20 to 80 minutes, held between 1000° F. to 1800° F. for 5 to 60 minutes, and then cooled to room temperature. Then, the compact is selectively densified to greater than 7.6 g/cc. The compact is sinter hardened to obtain a mainly Martensite microstructure. The compact can be directly high temperature sinter hardened if selective densification is not necessary. Material made by this method is also disclosed.

摘要翻译： 一种从粉末状金属制造部件的方法，包括以下步骤：提供冶金粉末，压力为25至65tsi的压力，以提供密度为6.4g / cc至7.4g / cc的生坯。 然后将该压坯在2100°F至2400°F的温度下高温烧结20至60分钟，或在1650°F至2400°F的温度下定期烧结20至80分钟，保持在1000 °F至1800°F进行5至60分钟，然后冷却至室温。 然后，压块选择性致密化至大于7.6g / cc。 该压坯经烧结硬化以获得主要的马氏体组织。 如果不需要选择性致密化，压实物可以直接进行高温烧结硬化。 还公开了通过该方法制造的材料。

公开(公告)号：US11265910B2

公开(公告)日：2022-03-01

申请号：US16739460

申请日：2020-01-10

申请人： Alireza Babaei ,  Esmael Dinan ,  Hua Zhou ,  Ali Cirik ,  Hyoungsuk Jeon ,  Kyungmin Park ,  Kai Xu ,  Nazanin Rastegardoost

发明人： Alireza Babaei ,  Esmael Dinan ,  Hua Zhou ,  Ali Cirik ,  Hyoungsuk Jeon ,  Kyungmin Park ,  Kai Xu ,  Nazanin Rastegardoost

IPC分类号： H04B7/06 ,  H04W72/14 ,  H04W72/04 ,  H04L5/00 ,  H04L1/18 ,  H04W16/14 ,  H04W74/08 ,  H04W74/02 ,  H04W76/11

摘要： A wireless device receives configuration parameters of one or more configured grants of a cell. The wireless device determines a first size of an uplink control information based on a second size of one or more code block groups of a transport block. The wireless device transmits, via a radio resource of the one or more configured grants, the one or more code block groups of the transport block the uplink control information with the first size.

公开(公告)号：US20220030577A1

公开(公告)日：2022-01-27

申请号：US17383499

申请日：2021-07-23

申请人： Hua Zhou ,  Esmael Hejazi Dinan ,  Ali Cagatay Cirik ,  Yunjung Yi ,  Kai Xu ,  Hyoungsuk Jeon

发明人： Hua Zhou ,  Esmael Hejazi Dinan ,  Ali Cagatay Cirik ,  Yunjung Yi ,  Kai Xu ,  Hyoungsuk Jeon

IPC分类号： H04W72/04

摘要： In some embodiments, a wireless device receives a plurality of downlink control information (DCIs) via a plurality of resource block (RB) sets of a bandwidth part of a cell. The plurality of DCIs indicate downlink radio resources. The wireless device receives a transport block via the downlink radio resources. Based on RB set indexes of the plurality of RB sets, the wireless device determines a DCI from the plurality of DCIs. Then, the wireless device transmits feedback information, for the transport block, via an uplink control channel resource determined based on the DCI.

公开(公告)号：US20210345410A1

公开(公告)日：2021-11-04

申请号：US17246112

申请日：2021-04-30

申请人： Hua Zhou ,  Esmael Hejazi Dinan ,  Yunjung Yi ,  Ali Cagatay Cirik ,  Jonghyun Park ,  Hyoungsuk Jeon ,  Kai Xu

发明人： Hua Zhou ,  Esmael Hejazi Dinan ,  Yunjung Yi ,  Ali Cagatay Cirik ,  Jonghyun Park ,  Hyoungsuk Jeon ,  Kai Xu

IPC分类号： H04W74/08 ,  H04W74/00 ,  H04W52/24

摘要： Described are embodiments for selecting a preamble for a random access procedure. In an embodiment, a wireless device receives one or more configuration parameters of physical random access channel (PRACH) occasions for the random access procedure. One or more PRACH occasions of the PRACH occasions correspond to a respective RS of a plurality of RSs. The wireless device determines a RS, from the plurality of RSs, based on a reference signal received power (RSRP) value of the RS, and a transmission power reduction value associated with the RS. The wireless device determines a PRACH occasion, associated with the RS, from the PRACH occasions. Then, the wireless device transmits, via the PRACH occasion, a preamble for the random access procedure.