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公开(公告)号：EP3176278B1
公开(公告)日：2019-03-20
申请号：EP15827899.4
申请日：2015-07-29
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公开(公告)号：EP3176278A1
公开(公告)日：2017-06-07
申请号：EP15827899.4
申请日：2015-07-29
发明人： NEISHI, Yutaka , SUZUKI, Takahisa , KOYAMA, Tatsuya , YAMASAKI, Shingo , KANETANI, Kohei , SADA, Takashi
CPC分类号： C22C38/32 , C21D1/06 , C21D6/002 , C21D6/008 , C21D9/40 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C23C8/32 , C23C8/80 , F16C33/62 , F16C2204/66 , F16C2204/70 , F16C2223/16 , F16C2240/90
摘要： Provided is a carbonitrided bearing part which has high hardenability and toughness, and is excellent in wear resistance and surface-originated flaking life. A carbonitrided bearing part of the present embodiment has a chemical composition containing, in mass%, C: 0.15 to 0.45%, Si: not more than 0.50%, Mn: 0.40 to 1.50%, P: not more than 0.015%, S: not more than 0.005%, Cr: 0.30 to 2.0%, Mo: 0.10 to 0.35%, V: 0.20 to 0.40%, Al: 0.005 to 0.10%, N: not more than 0.030%, and O: not more than 0.0015%, with the balance being Fe and impurities, and satisfying Formulae (1) and (2). At surface, C concentration is 0.7 to 1.2%, N concentration is 0.15 to 0.6%, and Rockwell hardness HRC is 58 to 65. 1.20 0.4 Cr + 0.4 Mo + 4.5 V 2.60 2.7 C + 0.4 Si + Mn + 0.8 Cr + Mo + V > 2.20
摘要翻译： 本发明提供淬透性和韧性高，耐磨损性和表面起皮剥离寿命优异的碳氮共渗轴承部。 本实施方式的碳氮共渗轴承部的化学组成以质量％计含有C：0.15〜0.45％，Si：0.50％以下，Mn：0.40〜1.50％，P：0.015％以下，S： ，Cr：0.30〜2.0％，Mo：0.10〜0.35％，V：0.20〜0.40％，Al：0.005〜0.10％，N：0.030％以下，O：0.0015％ 余量为Fe和杂质，满足式（1）和（2）。 在表面，C浓度为0.7-1.2％，N浓度为0.15-0.6％，洛氏硬度HRC为58-65。1.20 <0.4Cr + 0.4Mo + 4.5V <2.60 2.7C + 0.4Si + Mn + 0.8Cr +沫+ V> 2.20
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公开(公告)号：EP3176276A1
公开(公告)日：2017-06-07
申请号：EP15826735.1
申请日：2015-07-29
发明人： NEISHI, Yutaka , SUZUKI, Takahisa , KOYAMA, Tatsuya , YAMASAKI, Shingo , KANETANI, Kohei , SADA, Takashi
摘要： Provided is a steel for carbonitrided bearing which excels in hardenability and also excels in toughness, wear resistance, and surface-originated flaking life after quenching and tempering. A steel for carbonitrided bearing of the present embodiment has a chemical composition containing, in mass%, C: 0.22 to 0.45%, Si: not more than 0.50%, Mn: 0.40 to 1.50%, P: not more than 0.015%, S: not more than 0.005%, Cr: 0.30 to 2.0%, Mo: 0.10 to 0.35%, V: 0.20 to 0.40%, Al: 0.005 to 0.10%, N: not more than 0.030%, and O: not more than 0.0015%, with the balance being Fe and impurities, and satisfying Formulae (1) and (2). 1.20 0.4 Cr + 0.4 Mo + 4.5 V 2.60 2.7 C + 0.4 Si + Mn + 0.8 Cr + Mo + V > 2.20
摘要翻译： 本发明提供一种淬透性优异，并且淬火回火后的韧性，耐磨损性，表面起源剥落寿命优异的碳氮共渗轴承用钢。 本实施方式的碳氮共渗轴承用钢的成分组成以质量％计含有C：0.22〜0.45％，Si：0.50％以下，Mn：0.40〜1.50％，P：0.015％以下，S ：不大于0.005％，Cr：0.30〜2.0％，Mo：0.10〜0.35％，V：0.20〜0.40％，Al：0.005〜0.10％，N：0.030％以下，O：0.0015 ％，余量为Fe和杂质，满足式（1）和（2）。 1.20 <0.4Cr + 0.4Mo + 4.5V <2.60 2.7C + 0.4Si + Mn + 0.8Cr + Mo + V> 2.20
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4.发明公开
公开(公告)号：EP3088550A1
公开(公告)日：2016-11-02
申请号：EP14873478.3
申请日：2014-12-24
发明人： KOYAMA, Tatsuya , KUBOTA, Manabu
摘要： Provided is a production method of a carburized steel component, which can improve a gas carburizing property of a steel component having a high Si content, and suppress deterioration of productivity. The present production method includes a preliminary gas carburizing process, and a main gas carburizing process. In the preliminary gas carburizing process, a steel component having a chemical composition that contains C, Si, Mn, and Cr and, in mass%, satisfies Formula (1) is subjected to a gas carburizing treatment at a carburizing temperature T p that satisfies Formula (A) for 10 to less than 20 hours. In the main gas carburizing process, a gas carburizing treatment is performed at a carburizing temperature T r (°C) that satisfies Formula (B) for a carburizing time t r (minutes). 6.5 3.5 Si % + Mn % + 3 Cr % ≤ 18 800 ≤ T p 163 × ln CP + 0.6 − 41 × ln 3.5 × Si % + Mn % + 3 × Cr % + 950 4 13340 / T r + 273.15 − ln t r 7
Where, CP in the formula is substituted by a carbon potential during carburization in the preliminary carburizing process.摘要翻译： 本发明提供一种渗碳钢部件的制造方法，可以提高具有高Si含量的钢成分的气体渗碳性，并抑制生产率的恶化。 本制造方法包括初步气体渗碳处理，和主气体渗碳处理。 在初步气体渗碳处理，具有的化学组成的钢部件那样含有的C，Si，Mn和Cr及，以质量％计，SATIS外资企业式（1）进行的气体渗碳处理在渗碳温度T P上做SATIS外资企业 式（A）为10至小于20小时。 在主气体渗碳处理，气体渗碳处理是在渗碳温度T R（℃）做SATIS外资企业式（B）为渗碳时间t R（分）来进行。 6.5 <3.5的Si％+的Mn％+％的Cr 3‰¤¤‰T 18 800 P <163×LN CP + 0.6×'41 LN 3.5×的Si％+的Mn％+的Cr％+ 3×950 4 <13340 / ŤR + 273.15“TR LN <7式中，CP式中是由碳势在初步渗碳工艺渗碳时被取代。
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公开(公告)号：EP3378963A1
公开(公告)日：2018-09-26
申请号：EP17763304.7
申请日：2017-03-08
发明人： OBAYASHI, Koji , OKADA, Kazuaki , MATSUZAKA, Keisuke , SAKAKIBARA, Masashi , MIYANISHI, Kei , KOYAMA, Tatsuya , KUBOTA, Manabu
CPC分类号： C21D1/06 , C21D1/09 , C21D1/10 , C21D1/18 , C21D7/06 , C21D9/32 , C22C38/00 , C22C38/60 , Y02P10/212 , Y02P10/253
摘要： In this steel component, the concentration of C in a surface layer is 0.85 mass% or more to 1.2 mass% or less, which is higher than the concentration of C in a starting material steel, the surface layer has a volume ratio of a retained-austenite structure higher than 0% and lower than 10%, the remainder of the surface layer is a martensitic structure, the area fraction of grain boundary carbides in the surface layer is lower than 2%, a layer inside the surface layer is higher than the surface layer in a volume ratio of a retained-austenite structure, and in the layer inside the surface layer, the remainder is a martensitic structure.
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公开(公告)号：EP3279360A1
公开(公告)日：2018-02-07
申请号：EP16773270.0
申请日：2016-03-31
发明人： KOYAMA, Tatsuya , KUBOTA, Manabu
摘要： A case-hardened steel component includes a base metal and a carburized layer, the base metal has a predetermined chemical composition, a number density of Ti-based precipitates having an equivalent circle diameter of 5 to 50 nm in a surface region from a surface to a depth of 0.1 mm is 0.5 pieces/µm 2 or more, and in the surface region, a number density of AlN having an equivalent circle diameter of 50 nm or more and 100 nm or less is 0.5 pieces/µm 2 or less.
摘要翻译： 壳体硬化钢部件由基体金属和渗碳层构成，基体金属具有规定的化学组成，在从表面到表面区域的表面区域中的当量圆直径为5〜50nm的Ti系析出物的个数密度 0.1mm的深度为0.5个/μm2以上，在该表面区域中，当量圆直径为50nm以上且100nm以下的AlN的个数密度为0.5个/μm2以下。
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公开(公告)号：EP3006584A1
公开(公告)日：2016-04-13
申请号：EP13885805.5
申请日：2013-05-30
发明人： KOYAMA, Tatsuya , YOSHIDA, Suguru
CPC分类号： C21D1/06 , C21D1/10 , C21D1/42 , C21D1/74 , C21D9/32 , C22C38/38 , C22C38/60 , C23C8/32 , C23C8/80 , Y02P10/253
摘要： A soft nitrided induction hardened steel part which is excellent in bearing fatigue strength comprised of a predetermined chemical composition wherein a dissolved N concentration from the surface to 0.2 mm depth is 0.05 to 1.50%, a Vicker's hardness from the surface to 0.2 mm depth after tempering at 300°C is Hv600 or more, and t/r≤0.35 when an effective hardened layer depth "t" is 0.5 mm or more and a radius of a breakage risk site or half of the thickness is "r" (mm).
摘要翻译： 具有优异的轴承疲劳强度的软氮化感应淬火钢部件，其由表面至0.2mm深度的溶解的N浓度为0.05〜1.50％的预定化学成分，回火后的表面至表面深度为0.2mm的维氏硬度 在300℃时为Hv600以上，当有效硬化层深度“t”为0.5mm以上且t / r‰0.35时，破裂风险部位的半径或厚度的一半为“r”（mm） 。
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公开(公告)号：EP3176276B1
公开(公告)日：2019-12-18
申请号：EP15826735.1
申请日：2015-07-29
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