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1. 发明公开

EP3020841A1 COIL SPRING, AND METHOD FOR MANUFACTURING SAME 有权转让
标题翻译： SPULENFEDER UND VERFAHREN ZUR HERSTELLUNG DAVON
公开(公告)号：EP3020841A1
公开(公告)日：2016-05-18
申请号：EP14823237.4
申请日：2014-07-08
申请人： NHK Spring Co., Ltd. , Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) , Shinko Wire Co., Ltd.
发明人： YAMAMOTO, Fumio , TSURUGAI, Kengo , YOSHIHARA, Nao , MASUMOTO, Kei , OURA, Hiroshi , JINBO, Tetsuo , MAEHATA, Toshio , YAMAMOTO, Yoshiharu
IPC分类号： C22C38/00 , C21D1/06 , C21D9/02 , C22C38/34 , C22C38/48 , F16F1/06
CPC分类号： C21D9/02 , C21D1/06 , C21D1/773 , C21D6/004 , C21D6/005 , C21D6/008 , C22C38/00 , C22C38/002 , C22C38/04 , C22C38/06 , C22C38/24 , C22C38/26 , C22C38/34 , C22C38/46 , C22C38/48 , C23C8/22
摘要： To provide a coil spring having excellent fatigue resistance.
Disclosed is a coil spring made of steel, including (in % by mass, the same shall apply for a chemical composition): C: 0.40 to 0.70%; Si: 1.50 to 3.50%; Mn: 0.30 to 1.50%; Cr: 0.10 to 1.50%; V: 0.50 to 1.00%, and Al: 0.01% or less (excluding 0%), with the balance being iron and inevitable impurities, wherein an average crystal grain size number of prior austenite crystals in a depth of 0.3 mm from a surface is 11.0 or more, while a difference in grain size number between the respective prior austenite crystals is in a range of less than 3 from a grain size number observed at the maximum frequency, and wherein a carburized layer is provided in a depth of 0.30 to 1.00 mm from the surface, while an average Vickers hardness is 600 or higher at a position in a depth of (1/4) × diameter in the depth direction from the surface.
摘要翻译：提供具有优异耐疲劳性的螺旋弹簧。公开了一种由钢制成的螺旋弹簧，其包含（以质量％计，同样适用于化学成分）：C：0.40〜0.70％ Si：1.50〜3.50％ Mn：0.30〜1.50％ Cr：0.10〜1.50％ V：0.50〜1.00％，Al：0.01％以下（不含0％），余量为铁和不可避免的杂质，其中与表面相距0.3mm的原奥氏体晶体的平均晶粒数为 11.0以上，而各现有奥氏体晶体之间的晶粒尺寸数差距在最大频率下观察到的晶粒数小于3的范围内，并且其中以0.30〜1.00的深度设置渗碳层 mm，而在从表面的深度方向的深度（1/4）×直径）的位置，维氏硬度的平均值为600以上。

2. 发明授权

EP3020841B1 COIL SPRING, AND METHOD FOR MANUFACTURING SAME 有权转让
公开(公告)号：EP3020841B1
公开(公告)日：2018-08-22
申请号：EP14823237.4
申请日：2014-07-08
申请人： NHK Spring Co., Ltd. , Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) , Shinko Wire Co., Ltd.
发明人： YAMAMOTO, Fumio , TSURUGAI, Kengo , YOSHIHARA, Nao , MASUMOTO, Kei , OURA, Hiroshi , JINBO, Tetsuo , MAEHATA, Toshio , YAMAMOTO, Yoshiharu
IPC分类号： C22C38/00 , C21D1/06 , C21D9/02 , C22C38/34 , C22C38/48 , C21D1/773 , C21D6/00 , C23C8/22 , C22C38/04 , C22C38/06 , C22C38/24 , C22C38/26 , C22C38/46
CPC分类号： C21D9/02 , C21D1/06 , C21D1/773 , C21D6/004 , C21D6/005 , C21D6/008 , C22C38/00 , C22C38/002 , C22C38/04 , C22C38/06 , C22C38/24 , C22C38/26 , C22C38/34 , C22C38/46 , C22C38/48 , C23C8/22
摘要： To provide a coil spring having excellent fatigue resistance. Disclosed is a coil spring made of steel, including (in % by mass, the same shall apply for a chemical composition): C: 0.40 to 0.70%; Si: 1.50 to 3.50%; Mn: 0.30 to 1.50%; Cr: 0.10 to 1.50%; V: 0.50 to 1.00%, and Al: 0.01% or less (excluding 0%), with the balance being iron and inevitable impurities, wherein an average crystal grain size number of prior austenite crystals in a depth of 0.3 mm from a surface is 11.0 or more, while a difference in grain size number between the respective prior austenite crystals is in a range of less than 3 from a grain size number observed at the maximum frequency, and wherein a carburized layer is provided in a depth of 0.30 to 1.00 mm from the surface, while an average Vickers hardness is 600 or higher at a position in a depth of (1/4) × diameter in the depth direction from the surface.

3. 发明公开

EP3279357A1 HEAT-TREATED STEEL WIRE HAVING EXCELLENT FATIGUE-RESISTANCE CHARACTERISTICS 审中-公开
标题翻译：经过热处理的钢丝具有优异的抗疲劳特性
公开(公告)号：EP3279357A1
公开(公告)日：2018-02-07
申请号：EP16772443.4
申请日：2016-03-22
申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
发明人： OURA, Hiroshi , MASUDA, Tomokazu
IPC分类号： C22C38/00 , C22C38/34 , C22C38/54
CPC分类号： C21D9/02 , C21D8/065 , C21D2211/001 , C21D2211/004 , C21D2211/008 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/24 , C22C38/32 , C22C38/34 , C22C38/46 , C22C38/54 , F16F1/021 , F16F2224/0208 , F16F2226/02 , F16F2230/0023 , F16F2238/026
摘要： To provide a heat-treated steel wire having excellent fatigue-resistance characteristics. The heat-treated steel of the present invention has a predetermined chemical composition, with the balance being iron and inevitable impurities, wherein the heat-treated steel wire includes, in a tempered martensite structure at a depth of 0.3 mm from a surface layer: Cr based carbides having a circle equivalent diameter of 0.1 µm or more and less than 0.3 µm in 0.20 particles/µm 2 or less, Cr based carbides having a circle equivalent diameter of 0.3 µm or more and less than 0.7 µm in 0.002 particles/µm 2 or less, and Cr based carbides having a circle equivalent diameter of 0.7 µm or more in 0.0010 particles/µm 2 or less, and wherein the amount of residual austenite exceeds 5% and 15% or less in terms of a volume ratio.
摘要翻译：提供一种耐疲劳特性优异的热处理钢丝。本发明的热处理钢具有预定的化学组成，其余为铁和不可避免的杂质，其中经热处理的钢丝在距离表层Cr：0.3mm深度的回火马氏体组织中包含：当量圆直径为0.1μm以上且小于0.3μm的碳系碳化物为0.20个/μm2以下，当量圆直径为0.3μm以上且小于0.7μm的Cr系碳化物为0.002个/μm2以下以及当量圆直径为0.7μm以上的Cr系碳化物为0.0010个/μm2以下，以体积比计，残留奥氏体量超过5％且15％以下。

4. 发明公开

EP3279358A1 HEAT-TREATED STEEL WIRE HAVING EXCELLENT BENDABILITY 审中-公开
标题翻译：经过热处理的钢丝具有优异的可弯曲性
公开(公告)号：EP3279358A1
公开(公告)日：2018-02-07
申请号：EP16772444.2
申请日：2016-03-22
申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
发明人： OURA, Hiroshi , MASUDA, Tomokazu
IPC分类号： C22C38/00 , C22C38/34 , C22C38/54
CPC分类号： C21D9/02 , C21D6/008 , C21D8/065 , C22C38/00 , C22C38/001 , C22C38/04 , C22C38/06 , C22C38/24 , C22C38/32 , C22C38/34 , C22C38/46 , C22C38/54 , Y02P10/212
摘要： The present invention provides a heat-treated steel wire having excellent bendability. The heat-treated steel wire of the present invention includes, in % by mass: C: 0.5 to 0.8%, Si: 1.5 to 2.5%, Mn: 0.5 to 1.5%, P: more than 0% and 0.02% or less, S: more than 0% and 0.02% or less, Cr: 0.3 to less than 0.7%, V: 0.05 to 0.5%, Al: more than 0% and 0.01% or less, N: more than 0% and 0.007% or less, and O: more than 0% and 0.004% or less, with the balance being iron and inevitable impurities, wherein, when electrolytic extraction residue analysis is performed using a 1.0 µm filter and a 0.4 µm filter, a ratio of [amount of Cr based carbides in a 1.0 µm filter residue/amount of an electrolyte] is 1.0% or more and 2.80% or less, and, when residue analysis of the filtrate obtained by the 1.0 µm filter is performed, a ratio of [amount of Cr based carbides in a 0.4 µm filter residue/amount of an electrolyte] is 0.10% or less.
摘要翻译：本发明提供弯曲性优异的热处理钢丝。本发明的热处理钢丝以质量％计含有C：0.5〜0.8％，Si：1.5〜2.5％，Mn：0.5〜1.5％，P：大于0％且0.02％以下， S：大于0％且0.02％以下，Cr：0.3〜小于0.7％，V：0.05〜0.5％，Al：大于0％且0.01％以下，N：大于0％和0.007％或以下，O：大于0％且0.004％以下，其余为铁和不可避免的杂质，其中，使用1.0μm的过滤器和0.4μm的过滤器进行电解提取残渣分析时，[ 1.0μm过滤器残渣中的Cr系碳化物/电解质量]为1.0％以上且2.80％以下，进行通过1.0μm过滤器得到的滤液的残渣分析时，[Cr量 0.4μm过滤器残渣中的碳系碳化物/电解质量]为0.10％以下。

5. 发明授权

EP2824205B1 STEEL WIRE ROD WITH EXCELLENT SPRING WORKABILITY FOR HIGH-STRENGTH SPRING, PROCESS FOR MANUFACTURING SAME, AND HIGH-STRENGTH SPRING 有权
标题翻译：高强度弹簧具有优良弹性的钢丝杆，其制造工艺和高强度弹簧
公开(公告)号：EP2824205B1
公开(公告)日：2017-05-17
申请号：EP13757200.4
申请日：2013-02-25
申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
发明人： OURA, Hiroshi , YOSHIHARA, Nao
IPC分类号： C22C38/00 , C21D9/52 , C22C38/18 , C22C38/54 , C22C38/04 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C21D1/84 , C21D6/00 , C21D9/02 , C22C38/34
CPC分类号： C21D1/84 , C21D6/008 , C21D9/02 , C21D9/525 , C21D2211/004 , C21D2211/009 , C22C38/04 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/34

6. 发明公开

EP3128031A1 HIGH-STRENGTH STEEL MATERIAL HAVING EXCELLENT FATIGUE CHARACTERISTICS 审中-公开
标题翻译： HO TEN TEN TEN TEN TEN TEN TEN TEN TEN TEN TEN TEN TEN TEN TEN TEN TEN TEN TEN
公开(公告)号：EP3128031A1
公开(公告)日：2017-02-08
申请号：EP15773833.7
申请日：2015-03-27
申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
发明人： OURA, Hiroshi , MASUDA, Tomokazu , YOSHIHARA, Nao , NAITO, Takayuki , SUZUKI, Akito
IPC分类号： C22C38/00 , C22C38/34 , C22C38/54 , C21D8/06 , C21D9/52
CPC分类号： C22C38/00 , C21D1/25 , C21D8/06 , C21D9/52 , C21D2211/008 , C22C38/001 , C22C38/002 , C22C38/04 , C22C38/06 , C22C38/24 , C22C38/32 , C22C38/34 , C22C38/46 , C22C38/54
摘要： The present invention provides a steel material, such as a high-strength spring, that has excellent fatigue properties, and, more specifically, a steel material, such as the high-strength spring, that can improve the fatigue properties in a high-strength region more easily, without increasing an alloy cost. The steel material includes, in percent by mass, C: 0.5 to 1.0%, Si: 1.5 to 2.50%, Mn: 0.5 to 1.50%, P: more than 0% to 0.020% or less, S: more than 0% to 0.020% or less, Cr: more than 0% to 0.2% or less, Al: more than 0% to 0.010% or less, N: more than 0% to 0.0070% or less, and O: more than 0% to 0.0040% or less, and the balance consisting of iron and inevitable impurities, wherein Cr and Si contents satisfy a formula of Cr × Si ≤ 0.20, a ratio of tempered martensite in a steel microstructure is 80% or more by area, and a number density of particles of Cr-containing carbide or carbonitride having a circle-equivalent diameter of 50 nm or more in the steel microstructure is 0.10 particles/µm 2 or less.
摘要翻译：本发明提供一种具有优异的疲劳性能的钢材，例如高强度弹簧，更具体地说，可以提高高强度弹簧等钢材，能够提高高强度的疲劳性能区域更容易，而不增加合金成本。钢材以质量％计含有C：0.5〜1.0％，Si：1.5〜2.50％，Mn：0.5〜1.50％，P：大于0％〜0.020％以下，S：大于0％ 0.020％以下，Cr：0〜0.2％以下，Al：0％以上且0.010％以下，N：0％以上且0.0070％以下，O：0％以上且0.0040以下％以下，余量由铁和不可避免的杂质构成，其中Cr和Si含量满足Cr×Si‰¤0.20，钢微结构中回火马氏体的比例为80％以上，钢组织中的圆当量直径为50nm以上的含Cr的碳化物或碳氮化物的粒子的密度为0.10个/μm2以下。

7. 发明授权

EP2832891B1 STEEL WIRE ROD WITH EXCELLENT SHAVABILITY FOR HIGH-STRENGTH SPRING, AND HIGH-STRENGTH SPRING 有权
公开(公告)号：EP2832891B1
公开(公告)日：2019-02-20
申请号：EP13768751.3
申请日：2013-03-25
申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
发明人： OURA, Hiroshi , YOSHIHARA, Nao
IPC分类号： C22C38/34 , C22C38/04 , C22C38/20 , C22C38/24 , C22C38/22 , C22C38/26 , C22C38/32 , C22C38/06 , C21D9/02 , C21D8/06 , F16F1/02 , C22C38/44 , C22C38/46 , C22C38/54 , C22C38/40

8. 发明公开

EP2832891A1 STEEL WIRE ROD WITH EXCELLENT SHAVABILITY FOR HIGH-STRENGTH SPRING, AND HIGH-STRENGTH SPRING 审中-公开
标题翻译： WALZDRAHT MIT HERVORRAGENDER ENTZERRUNGFÜREINE HOCHFESTE FEDER UND HOCHFESTE FEDER
公开(公告)号：EP2832891A1
公开(公告)日：2015-02-04
申请号：EP13768751.3
申请日：2013-03-25
申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
发明人： OURA, Hiroshi , YOSHIHARA, Nao
IPC分类号： C22C38/34 , C22C38/54 , F16F1/02 , C21D8/06
CPC分类号： C22C38/34 , C21D8/06 , C21D8/065 , C21D9/02 , C21D2211/004 , C21D2211/009 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/32 , C22C38/40 , C22C38/44 , C22C38/46 , C22C38/54
摘要： This steel wire rod for a high-strength spring is a hot-rolled steel wire rod which has a prescribed chemical composition and a texture such that the area fraction of pearlite is 90% or more; and the average grain size number of pearlite nodules, namely Pave, satisfies the relationship (1) 6.0 ≤ Pave ≤ 12.0. In the hot-rolled steel wire rod, the total decarburized depth of the surface layer is 0.20 mm or less, and the content of Cr-based alloy carbides is 7.5% or lower relative to the mass of the steel wire rod. The wire rod for a high strength spring and a high-strength spring obtained using the same as the raw material exhibit excellent shavability and ensure excellent discharge of shavings and excellent SV processing which is not accompanied with the breaking of wire.
摘要翻译：该高强度弹簧用钢丝杆是具有规定的化学成分和质地的热轧钢丝棒，珠光体的面积率为90％以上。平均颗粒数为珠光体结节，即Pave，满足关系式（1）6.0‰¤Pave‰¤12.0。在热轧钢线材中，表层的总脱碳深度为0.20mm以下，Cr系合金碳化物的含量相对于钢丝棒的质量为7.5％以下。用于高强度弹簧的线材和使用其作为原料获得的高强度弹簧表现出优异的可剥离性并且确保优异的刨花放电和优异的SV处理，其不伴随着线的断裂。

9. 发明公开

EP2824205A1 STEEL WIRE ROD WITH EXCELLENT SPRING WORKABILITY FOR HIGH-STRENGTH SPRING, PROCESS FOR MANUFACTURING SAME, AND HIGH-STRENGTH SPRING 有权
标题翻译：高强度弹簧具有优良弹性的钢丝杆，其制造工艺和高强度弹簧
公开(公告)号：EP2824205A1
公开(公告)日：2015-01-14
申请号：EP13757200.4
申请日：2013-02-25
申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
发明人： OURA, Hiroshi , YOSHIHARA, Nao
IPC分类号： C22C38/00 , C21D9/52 , C22C38/18 , C22C38/54
CPC分类号： C21D1/84 , C21D6/008 , C21D9/02 , C21D9/525 , C21D2211/004 , C21D2211/009 , C22C38/04 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/34
摘要： The high-strength spring steel wire rod of the present invention is a steel wire rod obtained after hot rolling, the steel wire rod having a predetermined chemical component composition and a structure with a pearlite area ratio of 90% or more, and meeting the requirements of the following formulae (1) and (2) wherein Pave is an average of grain size numbers of pearlite nodules and Pσ is a standard deviation thereof. 8.0 ≤ Pave ≤ 12.0 0.0 Pσ ≤ 0.5
摘要翻译：本发明的高强度弹簧用钢线材是热轧后得到的钢线材，其具有规定的化学成分组成和珠光体面积率为90％以上的结构，满足要求（1）和（2）其中，Pave是珠光体结节的晶粒尺寸数的平均值，Pσ是其标准偏差。 8.0≤Pave≤12.00.0

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