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公开(公告)号：US11198915B2
公开(公告)日：2021-12-14
申请号：US15892122
申请日：2018-02-08
Applicant: Ford Motor Company
Inventor： Raj Sohmshetty , Constantin Chiriac , Mikhail Minevich , Jason Balzer , S. George Luckey, Jr.
IPC: C21D6/00 , C22C38/00 , C21D1/18 , C21D1/58 , C21D1/60 , C21D1/667 , C21D1/673 , C22C38/02 , C22C38/04
Abstract: A method of quenching a press hardenable steel is provided. The method includes an initial step of die quenching a part stamped within a stamping die followed by a partial quenching after the initial step of die quenching. In various methods, the press hardenable steel is a 36MnB5 grade steel and/or the initial step of die quenching is performed at a temperature of approximately 200° C.±10° C. in a die configured for 36MnB5 grade steel. At least one method further includes opening the die followed by the partial quenching, the partial quenching comprising spraying a cooling liquid onto the part to reduce a temperature of the part below approximately 130° C.±10° C., with the option of spraying to reduce the temperature of the part below approximately 100° C.±10° C.
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公开(公告)号：US11198167B2
公开(公告)日：2021-12-14
申请号：US16018506
申请日：2018-06-26
Applicant: Ford Motor Company
Inventor： Raj Sohmshetty , Constantin Chiriac , Mikhail Minevich , Liang Huang
Abstract: A method of forming a hot stamped, die quenched, and die trimmed part is provided. The method includes hot stamping and die quenching a blank with a quench die and forming a die quenched panel. The quench die includes at least one slow-cooling channel. The die quenched panel is die trimmed along the at least one localized soft zone that is adjacent a hard zone. The blank may be formed from a press hardenable steel (PHS), and the at least one soft zone may have a ferritic microstructure and the at least one hard zone may have a martensitic microstructure. The at least one localized soft zone may have a microhardness between about 200 HV and about 250 HV and the hard zone may have a microhardness between about 400 HV and about 500 HV.
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公开(公告)号：US10697035B2
公开(公告)日：2020-06-30
申请号：US15723350
申请日：2017-10-03
Applicant: FORD MOTOR COMPANY
Inventor： Raj Sohmshetty , Varinder Singh Saini , Constantin Chiriac
Abstract: A hot stamping die includes a body having a stamping surface, and cooling channels within the body. The cooling channels are positioned to transfer heat from region(s) of the surface to the channels. The hot stamping die also includes a heating element within the body, separate and apart from the channels. The heating element is positioned to heat region(s) of the body different from the region(s) of the surface at a rate greater than heat transfer from the channels to the region(s) of the surface.
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公开(公告)号：US20180111179A1
公开(公告)日：2018-04-26
申请号：US15299900
申请日：2016-10-21
Applicant: FORD MOTOR COMPANY
Inventor： Raj Sohmshetty , Constantin Chiriac , Torsten Hallfeldt , Elizabeth Bullard , James Engle
CPC classification number: B21C51/00 , B21D22/022 , B21D37/16 , C21D1/673 , C21D11/005
Abstract: A hot stamping system includes a controller programmed to alter a coolant flow rate, without altering cycle time, in an active cooling system of a die arrangement, configured to hot stamp metal into components, based on an amount of heat transferred from the components to the active cooling system such that a grain structure of the components transitions from an austenitic state to a martensitic state while the die arrangement is closed.
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公开(公告)号：US11229935B2
公开(公告)日：2022-01-25
申请号：US15299900
申请日：2016-10-21
Applicant: FORD MOTOR COMPANY
Inventor： Raj Sohmshetty , Constantin Chiriac , Torsten Hallfeldt , Elizabeth Bullard , James Engle
Abstract: A hot stamping system includes a controller programmed to alter a coolant flow rate, without altering cycle time, in an active cooling system of a die arrangement, configured to hot stamp metal into components, based on an amount of heat transferred from the components to the active cooling system such that a grain structure of the components transitions from an austenitic state to a martensitic state while the die arrangement is closed.
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Patent Agency Ranking
公开(公告)号：US09957584B2
公开(公告)日：2018-05-01
申请号：US14822323
申请日：2015-08-10
Applicant: Ford Motor Company
Inventor： Aindrea McKelvey Campbell , Constantin Chiriac , Garret Sankey Huff , Raj Sohmshetty
IPC: B21J15/00 , B21J15/02 , B21J15/08 , B21J15/28 , B21J15/14 , C21D1/40 , C21D9/00 , C21D9/46 , C22C21/00
CPC classification number: C21D9/46 , B21J15/00 , B21J15/025 , B21J15/08 , B21J15/147 , B21J15/28 , C21D1/40 , C21D9/0006 , C22C21/00
Abstract: A joined sheet stack and a method and system for forming the stack are disclosed. The stack may include a steel sheet and a second sheet. The steel sheet may include a bulk portion having a first tensile strength and one or more fastener regions having a second tensile strength that is lower than the first tensile strength and a microstructure that includes tempered martensite. A fastener may extend through each fastener region joining the steel sheet to the second sheet. The method may include heat treating one or more regions of a steel sheet to form one or more fastener regions having a tensile strength that is lower than a bulk tensile strength of the steel sheet and a microstructure that includes tempered martensite. A fastener may then be inserted into the one or more fastener regions to join the steel sheet to a second sheet.
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7.发明申请Method and System for Selectively Softening Hot Stamped Parts by Induction Heating 审中-公开通过感应加热选择性软化热冲件的方法和系统公开(公告)号：US20170051371A1
公开(公告)日：2017-02-23
申请号：US14830800
申请日：2015-08-20
Applicant: Ford Motor Company
Inventor： Kevin Robert Chauvin , Garret Sankey Huff , Constantin Chiriac , Raj Sohmshetty
CPC classification number: C21D1/42 , C21D9/0068 , C21D11/00 , Y02P10/253
Abstract: A method and system are disclosed for treating a press hardened part by induction heating localized areas of the part to have reduced hardness. The method and system monitor an ambient temperature, cycle time, outgoing part property requirements, and outgoing part hardness in local areas. A time value and temperature value are set by a computer system for a plurality of induction heaters. A local area of the part is induction heated to soften the part in localized areas. The hardness of the localized areas is tested after induction heating.
Abstract translation: 公开了一种用于通过感应加热部件的局部区域来处理加压硬化部分以降低硬度的方法和系统。 该方法和系统监测局部区域的环境温度，循环时间，出料部件性能要求和出料部件硬度。 时间值和温度值由用于多个感应加热器的计算机系统设置。 该部件的局部区域是感应加热以软化局部区域中的部件。 感应加热后测试局部区域的硬度。
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公开(公告)号：US11168379B2
公开(公告)日：2021-11-09
申请号：US15894763
申请日：2018-02-12
Applicant: Ford Motor Company
Inventor： Constantin Chiriac , Raj Sohmshetty , Elizabeth Bullard , James Engle , Stephen Kernosky
Abstract: A process for pre-conditioning a hot stamped part is provided. The process includes continuously annealing a boron steel material having an aluminum coating for a predetermined time and at a predetermined temperature such that less than 10 weight % Iron (Fe) is in the aluminum coating and AlSi pockets are formed in the aluminum coating prior to a subsequent hot stamping process, wherein the predetermined time and temperature are a function of a thickness of the boron steel material.
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9.发明申请公开(公告)号：US20200216922A1
公开(公告)日：2020-07-09
申请号：US16240930
申请日：2019-01-07
Applicant: Ford Motor Company
Inventor： Constantin Chiriac , Maik Broda , Kyle Fleeger , Jagbir Guron , Torsten Hallfeldt , Elizabeth Bullard
Abstract: A method of treating a blank is provided. The method includes moving a blank through a first section of a furnace at an inter-critical temperature and through a second section of the furnace at a critical temperature greater than the inter-critical temperature before hot stamping the blank. Movement of the blank from the first section to the second section of the furnace is delayed during a hot stamping line stoppage. The blank is in the first section of the furnace for a first time period and in the second section of the furnace a second time period less than the first time period. Also, the first section of the furnace may have a first length and in the second section of the furnace may have a second length that is less than the first length.
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公开(公告)号：US20190249271A1
公开(公告)日：2019-08-15
申请号：US15894763
申请日：2018-02-12
Applicant: Ford Motor Company
Inventor： Constantin Chiriac , Raj Sohmshetty , Elizabeth Bullard , James Engle , Stephen Kernosky
CPC classification number: C21D9/56 , B21D22/022 , C21D1/26 , C21D1/42 , C21D8/0221 , C21D8/0247
Abstract: A process for pre-conditioning a hot stamped part is provided. The process includes continuously annealing a boron steel material having an aluminum coating for a predetermined time and at a predetermined temperature such that less than 10% Iron (Fe) is in the aluminum coating and AlSi pockets are formed in the aluminum coating prior to a subsequent hot stamping process, wherein the predetermined time and temperature are a function of a thickness of the boron steel material.
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