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公开(公告)号：EP3480333A1
公开(公告)日：2019-05-08
申请号：EP17824224.4
申请日：2017-07-04
IPC分类号： C22C38/00 , C22C38/60 , B22D11/00 , B22D11/124
摘要： A steel for machine structural use is provided which is excellent in machinability, rusting characteristics, and hot ductility. The steel for machine structural use according to the present embodiment has a chemical composition which consists of, in mass%, C: 0.30 to 0.80%, Si: 0.01 to 0.80%, Mn: 0.20 to 2.00%, P: 0.030% or less, S: 0.010 to 0.100%, Pb: 0.010 to 0.100%, Al: 0.010 to 0.050%, N: 0.015% or less and O: 0.0005 to 0.0030%, with the balance being Fe and impurities, the chemical composition satisfying Formula (1). The total number of specific inclusions included in the steel which are any of MnS inclusions, Pb inclusions and composite inclusions containing MnS and Pb and which have an equivalent circular diameter of 5 µm or more is 40 per mm 2 or more. Mn / S ≥ 8.0 Where, a content (mass%) of a corresponding element is substituted for each symbol of an element in Formula (1).
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公开(公告)号：EP1820869B1
公开(公告)日：2015-10-07
申请号：EP05814388.4
申请日：2005-11-30
发明人： HASHIMURA, Masayuki , HAGIWARA, Hiroshi , MIYAKI, Takanori , KISU, Takayuki , YAMAZAKI, Kouichi
IPC分类号： C22C38/00 , C21D8/06 , C21D9/52 , C22C38/04 , C22C38/60 , F16F1/06 , C22C38/02 , C22C38/22 , C22C38/28
CPC分类号： C22C38/04 , C21D8/06 , C21D9/525 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/22 , C22C38/28
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公开(公告)号：EP2453033B1
公开(公告)日：2015-09-09
申请号：EP10797220.0
申请日：2010-07-09
申请人： Nippon Steel & Sumitomo Metal Corporation , Suzuki Metal Industry Co., Ltd. , Honda Motor Co., Ltd.
发明人： HASHIMURA, Masayuki , DEMACHI, Hitoshi , KISU, Takayuki , SUZUKI, Shoichi , SUEHIRO, Motonobu , KAWAGUCHI, Jun , MAEKAWA, Keiichi , MURAKAMI, Atsushi
CPC分类号： C22C38/34 , C21D6/008 , C21D8/065 , C21D9/52 , C21D2211/001 , C21D2211/008 , C22C38/001 , C22C38/04 , C22C38/06 , C22C38/22 , C22C38/24
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4.发明授权
公开(公告)号：EP2357260B1
公开(公告)日：2018-09-19
申请号：EP10731151.6
申请日：2010-01-13
IPC分类号： C22C38/00 , C21D8/06 , C22C38/60 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/18 , C21D9/40 , C21D9/32 , C21D9/36 , C21D9/38
CPC分类号： C22C38/02 , B21J1/02 , C21D1/32 , C21D1/58 , C21D6/002 , C21D8/0205 , C21D8/0226 , C21D8/0257 , C21D9/32 , C21D9/36 , C21D9/38 , C21D9/40 , C21D2211/004 , C21D2211/005 , C22C38/001 , C22C38/002 , C22C38/04 , C22C38/06 , C22C38/28 , F16C33/62
摘要： This case hardening steel has a chemical composition including, by mass%: C: 0.1 to 0.6%; Si: 0.02 to 1.5%; Mn: 0.3 to 1.8%; P: 0.025% or less; S: 0.001 to 0.15%; Al: over 0.05 to 1.0%; Ti: 0.05 to 0.2%; N: 0.01% or less; and O: 0.0025% or less, and further including, by mass%, one or more of Cr: 0.4 to 2.0%, Mo: 0.02 to 1.5%, Ni: 0.1 to 3.5%, V: 0.02 to 0.5%, and B: 0.0002 to 0.005%, and the balance consisting of iron and unavoidable impurities.
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公开(公告)号：EP2003222B1
公开(公告)日：2016-05-04
申请号：EP07741060.3
申请日：2007-03-29
IPC分类号： C22C38/00 , C21D9/52 , C22C38/04 , C22C38/60 , F16F1/02 , C21D1/18 , C22C38/02 , C22C38/18 , C22C38/34
CPC分类号： C21D9/52 , C21D1/18 , C21D2211/008 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/18 , C22C38/34 , C22C38/60 , Y02P10/212
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6.发明公开
公开(公告)号：EP3135785A1
公开(公告)日：2017-03-01
申请号：EP15783239.5
申请日：2015-04-22
发明人： HASHIMURA, Masayuki , YAMAMOTO, Junya , MIZUKAMI, Kazumi , YOSHIDA, Naotsugu , MIYAZAKI, Masafumi , MIYAMOTO, Kenichiro
IPC分类号： C22C38/00 , B22D11/115 , B22D11/124 , C21C7/04 , C21C7/06 , C21C7/10 , C22C38/60
CPC分类号： C21D9/02 , B22D11/001 , B22D11/115 , B22D11/124 , C21C7/04 , C21C7/06 , C21C7/10 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/34 , C22C38/42 , C22C38/46 , C22C38/50 , C22C38/54 , C22C38/60
摘要： A spring steel according to the present embodiment has a chemical composition consisting of, in mass%, C: 0.4 to 0.7%, Si: 1.1 to 3.0%, Mn: 0.3 to 1.5%, P: equal to or less than 0.03%, S: equal to or less than 0.05%, Al: 0.01 to 0.05%, rare earth metal: 0.0001 to 0.002%, N: equal to or less than 0.015%, O: equal to or less than 0.0030%, Ti: 0.02 to 0.1%, and as optional elements, Ca, Cr, Mo, W, V, Nb, Ni, Cu, and B, with the balance being Fe and impurities. In the spring steel, the number of oxide inclusions having an equivalent circular diameter of equal to or greater than 5 µm is equal to or less than 0.2/mm 2 , the oxide inclusions each being one of an Al-based oxide, a complex oxide containing REM, O and Al, and a complex oxysulfide containing REM, O, S, and Al. Further, a maximum value among equivalent circular diameters of the oxide inclusions is equal to or less than 40 µm.
摘要翻译： 根据本实施方式的弹簧钢具有质量％C：0.4〜0.7％，Si：1.1〜3.0％，Mn：0.3〜1.5％，P：0.03％以下的化学组成， S：0.05％以下，Al：0.01〜0.05％，稀土金属：0.0001〜0.002％，N：0.015％以上，O：0.0030％以上，Ti：0.02〜 0.1％，作为任选的元素，Ca，Cr，Mo，W，V，Nb，Ni，Cu和B，余量为Fe和杂质。 在弹簧钢中，等效圆直径等于或大于5μm的氧化物夹杂物的数量等于或小于0.2 / mm 2，氧化物夹杂物各自为Al基氧化物，复合氧化物 含有REM，O和Al，以及含有REM，O，S和Al的复合氧硫化物。 此外，氧化物夹杂物的当量圆直径的最大值等于或小于40μm。
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公开(公告)号：EP2135967B1
公开(公告)日：2016-04-06
申请号：EP08740529.6
申请日：2008-04-10
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公开(公告)号：EP2058411B1
公开(公告)日：2014-02-19
申请号：EP06823432.7
申请日：2006-11-09
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9.发明授权
公开(公告)号：EP2204463B1
公开(公告)日：2019-05-01
申请号：EP08846041.5
申请日：2008-10-27
IPC分类号： C22C38/00 , C22C38/38 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32 , C21D8/00
CPC分类号： C22C38/38 , C21D1/25 , C21D7/13 , C21D8/06 , C21D2211/004 , C21D2211/008 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32
摘要： The present invention provides hot forging use non heat-treated steel where controlled cooling after shaping by hot forging is used to make the main structure of the steel martensite even without subsequent reheating and heat treatment by quenching and tempering and thereby give a steel part with a high strength and high toughness and superior machineability and a hot forged non heat-treated steel part made of that steel, in particular provides a martensite type hot forging use non heat-treated steel characterized by containing, by mass%, C: 0.10 to 0.20%, Si: 0.10 to 0.50%, Mn: 1.0 to 3.0%, P: 0.001 to 0.1%, S: 0.005 to 0.8%, Cr: 0.10 to 1.50%, Al: over 0.1 to 0.20%, and N: 0.0020 to 0.0080% and having a balance of substantially Fe and unavoidable impurities and a hot forged non heat-treated steel part made of such steel and characterized in that the steel structure of the entire cross-section at part or all of that part is substantially a martensite structure with an effective crystal grain size of 15 µm or less.
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10.发明授权
公开(公告)号：EP2388351B1
公开(公告)日：2019-04-17
申请号：EP10731349.6
申请日：2010-01-15
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