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公开(公告)号：US20180100220A1
公开(公告)日：2018-04-12
申请号：US15376466
申请日：2016-12-12
发明人： Sung Chul Cha , Seong Guk Son , Seung Hyun Hong , Soon Woo Kwon
CPC分类号： C22C38/58 , C21D6/005 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50
摘要： Disclosed herein is a high manganese steel including: 0.5 to 1.2 wt % of carbon (C), 0.1 to 2.3 wt % of silicon (Si), 15 to 30 wt % of manganese (Mn), 7.0 to 13.0 wt % of aluminum (Al), 0.01 to 3.0 wt % of nickel (Ni), 0.01 to 0.5 wt % of chromium (Cr), 0.01 to 0.4 wt % of molybdenum (Mo), 0.01 to 0.5 wt % of vanadium (V), 0.005 to 0.3 wt % of niobium (Nb), 0.005 to 0.3 wt % of titanium (Ti), and remainder iron (Fe) and other inevitable impurities.
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公开(公告)号：US20170167004A1
公开(公告)日：2017-06-15
申请号：US15151755
申请日：2016-05-11
发明人： Jeen Woo Park , Sung Chul Cha , Jong Hwi Park , Kyu Ho Lee
CPC分类号： C22C38/46 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/42
摘要： Disclosed are a steel composition and a spring steel comprising the same. The steel composition comprises: an amount of about 0.51 to 0.57% by weight of carbon (C), an amount of about 1.35 to 1.45% by weight of silicon (Si), an amount of about 0.95 to 1.05% by weight of manganese (Mn), an amount of about 0.60 to 0.80% by weight of chromium (Cr), an amount of about 0.25 to 0.35% by weight of copper (Cu), an amount of about 0.05 to 0.15% by weight of vanadium (V), an amount of about 0.25 to 0.35% by weight of nickel (Ni), an amount of about 0.003 to 0.015% by weight of phosphorus (P), an amount of about 0.003 to 0.010% by weight of sulfur (S), and iron (Fe) constituting the remaining balance of the steel composition, all the % by weights are based on the total weight of the steel composition.
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公开(公告)号：US10718039B2
公开(公告)日：2020-07-21
申请号：US15342811
申请日：2016-11-03
发明人： Sung Chul Cha , Soon Woo Kwon , Hyuk Kim
IPC分类号： C22C38/52 , C22C38/48 , C22C38/46 , C22C38/44 , C22C38/42 , C22C38/34 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C22C38/50
摘要： Disclosed herein is a steel composition with improvement in tensile strength and fatigue life, which can be used for a vehicle part such as a vehicle suspension system.
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公开(公告)号：US10513765B2
公开(公告)日：2019-12-24
申请号：US15377785
申请日：2016-12-13
发明人： Sung Chul Cha , Ik Soo Kim , Young Joon Kang
IPC分类号： C22C38/58 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/52 , C22C38/54
摘要： Disclosed herein is stainless steel having excellent tensile strength, fatigue strength, oxidation resistance at high temperature environment. According to an exemplary embodiment of the present invention, the stainless steel having excellent oxidation resistance at high temperature includes C: 0.01 to 0.2%, Si: 0.1 to 1.0%, Mn: 0.1 to 2.0%, Cr: 12.0 to 30.0%, V: 0.01 to 0.5%, Nb: 0.01 to 0.5%, Al: 0.1 to 4.0%, Co: 0.01 to 5.0%, Mo: 0.01 to 4.0%, W: 0.01 to 4.0%, B: 0.001 to 0.15%, Ni: 5.0 to 20.0% as wt %, the balance Fe, and other inevitable impurities.
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公开(公告)号：US10308996B2
公开(公告)日：2019-06-04
申请号：US14935881
申请日：2015-11-09
发明人： Moon Ki Bae , Seung Hyun Hong , Sung Chul Cha
IPC分类号： C21D9/46 , C21D8/02 , C22C38/32 , C22C38/22 , C22C38/28 , C22C38/26 , C22C38/04 , C22C38/02 , C23C2/06 , C23C2/28 , B32B15/01 , C23C2/04 , C23C28/02 , C23C28/00 , C23C2/40 , C23C30/00 , B32B15/18 , C22C38/50 , B32B15/04 , C22C38/12 , C22C38/14 , C22C38/48 , C22C38/44 , C23C2/26
摘要： Disclosed is a steel composition for hot stamping that comprises carbon (C) in an amount of about 0.22 to about 0.25 wt %, silicon (Si) in an amount of about 0.2 to about 0.3 wt %, manganese (Mn) in an amount of about 1.2 to about 1.4 wt %, titanium (Ti) in an amount of about 0.02 to about 0.05 wt %, chromium (Cr) in an amount of about 0.11 to about 0.2 wt %, boron (B) in an amount of about 0.005 to about 0.01 wt %, zinc (Zr) in an amount of about 0.005 to about 0.02 wt %, niobium (Nb) in an amount of about 0.01 to about 0.05 wt %, tungsten (W) in an amount of about 0.1 to about 0.5 wt %, iron (Fe) constituting the remaining balance of the steel composition, all the wt % based on the total amount of the steel composition.
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公开(公告)号：US20170159160A1
公开(公告)日：2017-06-08
申请号：US15179712
申请日：2016-06-10
发明人： Sung Chul Cha , Hyung Oh Ban , Seung Hyun Hong , Chul Woo Park
IPC分类号： C22C38/52 , C22C38/48 , C22C38/46 , C22C38/44 , F01L1/46 , C22C38/34 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C22C38/50 , C22C38/42
CPC分类号： C22C38/52 , C21D8/065 , C21D9/02 , C21D9/525 , C21D2211/003 , C21D2211/004 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/34 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , F01L1/462 , F01L2101/00
摘要： A steel composition is provided and includes carbon of about 0.5 to 0.7 wt %; silicon of about 1.3 to 2.3 wt %; manganese of about 0.6 to 1.2%; chromium of about 0.6 to 1.2 wt %; molybdenum of about 0.1 to 0.5 wt %; nickel of about 0.05 to 0.8 wt %; vanadium of about 0.05 to 0.5 wt %; niobium of about 0.05 to 0.5 wt %; titanium of about 0.05 to 0.3 wt %; cobalt of about 0.01 to 3 wt %; zirconium of about 0.001 to 0.2 wt %; yttrium of about 0.01 to 1.5 wt %; copper of about 0.3% or less but greater than 0 wt %; aluminum of about 0.3% or less but greater than 0 wt %; nitrogen of about 0.03% or less but greater than 0 wt %; oxygen of about 0.003% or less but greater than 0 wt %. Additionally, a balance iron, based on the total weight is included.
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公开(公告)号：US10000831B2
公开(公告)日：2018-06-19
申请号：US15151755
申请日：2016-05-11
发明人： Jeen Woo Park , Sung Chul Cha , Jong Hwi Park , Kyu Ho Lee
CPC分类号： C22C38/46 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/42
摘要： Disclosed are a steel composition and a spring steel comprising the same. The steel composition comprises: an amount of about 0.51 to 0.57% by weight of carbon (C), an amount of about 1.35 to 1.45% by weight of silicon (Si), an amount of about 0.95 to 1.05% by weight of manganese (Mn), an amount of about 0.60 to 0.80% by weight of chromium (Cr), an amount of about 0.25 to 0.35% by weight of copper (Cu), an amount of about 0.05 to 0.15% by weight of vanadium (V), an amount of about 0.25 to 0.35% by weight of nickel (Ni), an amount of about 0.003 to 0.015% by weight of phosphorus (P), an amount of about 0.003 to 0.010% by weight of sulfur (S), and iron (Fe) constituting the remaining balance of the steel composition, all the % by weights are based on the total weight of the steel composition.
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公开(公告)号：US20170298486A1
公开(公告)日：2017-10-19
申请号：US15342811
申请日：2016-11-03
发明人： Sung Chul Cha , Soon Woo Kwon , Hyuk Kim
IPC分类号： C22C38/52 , C22C38/48 , C22C38/46 , C22C38/44 , C22C38/42 , C22C38/34 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C22C38/50
摘要： Disclosed herein is a steel composition with improvement in tensile strength and fatigue life, which can be used for a vehicle part such as a vehicle suspension system.
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公开(公告)号：US10544486B2
公开(公告)日：2020-01-28
申请号：US15376178
申请日：2016-12-12
发明人： Min Woo Kang , Sung Chul Cha , Joong Kil Choe
摘要： Disclosed are nickel alloys for exhaust system components having improved tensile strength, fatigue strength, oxidation resistance, and abrasion resistance at a high temperature condition. A nickel alloy for exhaust system components according to an embodiment is used for exhaust system components of a vehicle engine, the nickel alloy including: 0.01 to 0.2 wt % of C; 0.1 to 1.0 wt % of Si; 0.1 to 1.5 wt % of Mn; 8 to 24 wt % of Cr; 0.1 to 2.5 wt % of Nb; 0.1 to 4.0 wt % of Al; 0.01 to 1 wt % of Co; 0.01 to 5.0 wt % of Mo; 0.01 to 4 wt % of W; 0.1 to 1 wt % of Ta; 0.1 to 2.4 wt % of Ti; 4.0 to 11.0 wt % of Fe; a remainder being Ni; and inevitable impurities.
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公开(公告)号：US10400324B2
公开(公告)日：2019-09-03
申请号：US15364088
申请日：2016-11-29
发明人： Sung Chul Cha , June Ho Yang , Hee Sam Kang , Chi Hoon Choi , Sang Yoon Park , Jong Dae Lim , Seung Hyun Hong
IPC分类号： C23C16/02 , C23C28/00 , B29C70/30 , B32B27/38 , B29K105/08 , C23C14/24 , B29C35/02 , B32B1/08 , B32B5/26 , C23C14/02 , C23C14/08 , C23C16/44 , F16J1/16 , C23C14/06 , C23C16/30 , C23C30/00 , B29L31/00
摘要： Disclosed herein is a method of treating a composite piston pin, including: preparing the piston pin of which at least surface layer includes a composite material including a reinforcing fiber and a resin; improving roughness by processing the surface layer of the piston pin; and forming a coating layer on the surface layer processed to reduce a friction coefficient of the piston pin.
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