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1. 发明公开

EP4276212A1 COLD FORGED GEAR STEEL AND MANUFACTURING METHOD THEREFOR 审中-实审
公开(公告)号：EP4276212A1
公开(公告)日：2023-11-15
申请号：EP22762550.6
申请日：2022-03-02
申请人： BAOSHAN IRON & STEEL CO., LTD.
发明人： ZHANG, Jun , ZHAO, Sixin , GAO, Jiaqiang , WANG, Wei
IPC分类号： C22C38/02 , C22C38/00 , C21D8/02
摘要： Disclosed is a cold forged gear steel. In addition to Fe and inevitable impurities, the cold forged gear steel further comprises the following chemical elements in mass percentage: 0.15-0.17% of C, 0.10-0.20% of Si, 1.0-1.10% of Mn, 0.80-0.90% of Cr and 0.02-0.04% of Al. Correspondingly, further disclosed is a manufacturing method for the cold forged gear steel, comprising the steps of: (1) smelting and casting; (2) heating; (3) forging or rolling; and (4) spheroidizing annealing: heating to and keeping at 750-770 °C, then cooling with a cooling rate of 5-15 °C/h to and keeping at 700-720 °C, cooling with a cooling rate of 3-12 °C/h to and keeping at 660-680 °C, and cooling with a cooling rate of 5-20 °C/h to 500 °C or below, and then tapping and cooling.

2. 发明授权

EP3235924B1 QUENCHED-TEMPERED HIGH-STRENGTH STEEL WITH YIELD STRENGTH OF 900 MPA TO 1080 MPA GRADE, AND MANUFACTURING METHOD THEREFOR 有权
公开(公告)号：EP3235924B1
公开(公告)日：2020-01-15
申请号：EP15869229.3
申请日：2015-12-08
申请人： Baoshan Iron & Steel Co., Ltd.
发明人： YANG, Ana , LIU, Gang , WANG, Wei , YANG, Xiaozhen
IPC分类号： C22C38/58 , C22C38/54 , C21D8/02 , C21D6/00 , C21D9/46 , C21D1/18 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50

3. 发明公开

EP3954799A1 STEEL, WIRE ROD AND MANUFACTURING METHOD OF WIRE ROD 审中-公开
公开(公告)号：EP3954799A1
公开(公告)日：2022-02-16
申请号：EP20813182.1
申请日：2020-05-25
申请人： BAOSHAN IRON & STEEL CO., LTD.
发明人： ZHANG, Jun , ZHAO, Sixin , GAO, Jiaqiang , WANG, Wei
IPC分类号： C22C38/02 , C22C38/04 , C21D8/06 , C21D1/18
摘要： Provided is a steel comprising the following chemical composition in percentage by mass: 0.150-0.250% of C, 0.10-0.50% of Si, 0.60-1.50% of Mn, 0.30-1.20% of Cr, 0.20-0.80% of Mo, 2.00-4.00% of Ni, 0-0.10% of Nb, 0.0010-0.0050% of B, 0-0.12% of V, 0.003-0.06% of Ti, 0.01-0.08% of Al, the balance being Fe and unavoidable impurities. Also provided is a steel bar and a manufacturing method thereof. The steel bar is made from the above steel. The manufacturing method comprises the steps of smelting and casting, heating, forging or rolling, quenching, and tempering.

4. 发明授权

EP3235913B1 HIGH-STRENGTH AND HIGH-TOUGHNESS STEEL PLATE WITH 800 MPA GRADE TENSILE STRENGTH AND METHOD FOR MANUFACTURING THE SAME 有权转让
公开(公告)号：EP3235913B1
公开(公告)日：2020-05-13
申请号：EP15869173.3
申请日：2015-11-24
申请人： BAOSHAN IRON & STEEL CO., LTD.
发明人： WANG, Huanrong , YANG, Ana , WANG, Wei
IPC分类号： C21D1/20 , C21D8/02 , C22C38/12 , C21D9/46 , C22C38/00 , C22C38/38 , C22C38/06 , C22C38/02 , C22C38/04

5. 发明公开

EP3235920A1 LOW-YIELD-RATIO ULTRA-HIGH-STRENGTH HOT-ROLLED Q&P STEEL AND PRODUCTION METHOD THEREFOR 有权转让
标题翻译：低屈服比超高强度热轧Q＆P钢及其生产方法
公开(公告)号：EP3235920A1
公开(公告)日：2017-10-25
申请号：EP15869172.5
申请日：2015-11-24
申请人： Baoshan Iron & Steel Co., Ltd.
发明人： WANG, Huanrong , YANG, Ana , WANG, Wei
IPC分类号： C22C38/14 , C22C38/12 , C21D8/02
摘要： Disclosed is a low yield ratio and superhigh-strength hot-rolled Q&P steel and a method for manufacturing the same, having the following chemical composition in weight percentage: C: 0.2-0.3%, Si: 1.0-2.0%, Mn: 1.5-2.5%, P: ≤ 0.015%, S: ≤ 0.005%, Al: 0.5-1.0%, N: ≤ 0.006%, Nb: 0.02-0.06%, Ti: ≤ 0.03%, O: ≤ 0.003%, and the balance being Fe and inevitable impurities. The manufacture method comprises stepped cooling process to finally obtain a three-phase structure containing a certain volume fraction of proeutectoid ferrite + a certain volume fraction of martensite + a certain volume fraction of residual austenite. By controlling the relative contents of the three different phases, a low yield ratio and superhigh-strength hot-rolled Q&P steel having an excellent comprehensive performance which has a yield strength of ≥ 600 MPa and a tensile strength of ≥ 1300 Mpa as well as a good elongation and a low yield ratio, shows an excellent match of high plasticity and can be applied in the field of steels requiring easy deformabilities and wear-resistances, is obtained.
摘要翻译：本发明公开了一种低屈服比和超高强度热轧Q＆P钢及其制造方法，其具有以下重量百分比的化学组成：C：0.2-0.3％，Si：1.0-2.0％，Mn：1.5- 2.5％，P：≤0.015％，S：≤0.005％，Al：0.5-1.0％，N：≤0.006％，Nb：0.02-0.06％，Ti：≤0.03％，O：≤0.003％，余量是铁和不可避免的杂质。该制造方法包括阶梯式冷却工艺，最终得到含有一定体积分数的先共析铁素体+一定体积分数的马氏体+一定体积分数的残余奥氏体的三相组织。通过控制三种不同相的相对含量，具有屈服强度≥600MPa，拉伸强度≥1300MPa的综合性能优异的低屈服比和超高强度热轧Q＆P钢以及良好的伸长率和低的屈服比，表现出高塑性的极佳匹配，并且可以应用于需要易变形性和耐磨损性的钢领域。

6. 发明公开

EP3235913A1 HIGH-STRENGTH HIGH-TENACITY STEEL PLATE WITH TENSILE STRENGTH OF 800 MPA AND PRODUCTION METHOD THEREFOR 有权转让
标题翻译： 800MPa拉伸强度的高强度高强度钢板及其制造方法
公开(公告)号：EP3235913A1
公开(公告)日：2017-10-25
申请号：EP15869173.3
申请日：2015-11-24
申请人： Baoshan Iron & Steel Co., Ltd.
发明人： WANG, Huanrong , YANG, Ana , WANG, Wei
IPC分类号： C21D1/20 , C21D8/02 , C22C38/12
摘要： Disclosed are a high-strength and high-toughness steel plate with an 800 MPa grade tensile strength and a method for manufacturing the same, the chemical composition of the steel plate in weight percentage being: C: 0.15-0.25%, Si: 1.0-2.0%, Mn: 1.2-2.0%, P≤ 0.015%, S≤ 0.005%, Al: 0.5-1.0%, N: ≤ 0.006%, Nb: 0.02-0.06%, O≤ 0.003%, and the balance being Fe and other inevitable impurities, and 1.5% ≤ Si + Al ≤ 2.5%. By adopting an isothermal heat treatment a high-strength and high-toughness steel plate with an 800 MPa grade tensile strength, which has a microstructure mainly including bainite ferrite and residual austenite, is obtainedimpact energy.
摘要翻译：本发明公开了一种800MPa级抗拉强度的高强度高韧性钢板及其制造方法，该钢板的化学成分重量百分比为：C：0.15〜0.25％，Si：1.0〜 2.0％，Mn：1.2〜2.0％，P≤0.015％，S≤0.005％，Al：0.5〜1.0％，N：≤0.006％，Nb：0.02〜0.06％，O≤0.003％，其余为Fe 和其他不可避免的杂质，1.5％≤Si+Al≤2.5％。通过采用等温热处理，获得具有以贝氏体铁素体和残余奥氏体为主要组织的显微组织为800MPa级拉伸强度的高强度高韧性钢板，从而获得高能量。

7. 发明公开

EP4089197A1 CHAIN STEEL FOR USE IN MINE AND MANUFACTURING METHOD THEREFOR 审中-实审
公开(公告)号：EP4089197A1
公开(公告)日：2022-11-16
申请号：EP21760437.0
申请日：2021-02-23
申请人： BAOSHAN IRON & STEEL CO., LTD.
发明人： GAO, Jiaqiang , ZHAO, Sixin , WANG, Wei , ZHANG, Jun
IPC分类号： C22C38/02 , C22C38/08 , C22C38/18 , C22C38/22 , C22C38/24 , C22C38/26 , C21D8/06
摘要： A steel for mining chain and a manufacturing method thereof, wherein the steel has compositions by weight percentage: C: 0.20~0.28%, Si: 0.01~0.40%, Mn: 0.50~1.50%, P≤0.015%, S≤0.005%, Cr : 0.30~2.00%, Ni: 0.50~2.00%, Mo: 0.10~0.80%, Cu: 0.01~0.30%, Al: 0.01~0.05%, Nb : 0.001~0.10%, V: 0.001~0.10%, H≤0.00018%, N≤0.0150%, O≤0.0020%, and the balance is Fe and inevitable impurities. The manufacturing method comprises steps of smelting, refining and vacuum treatment, casting, heating, forging or rolling, and quenching and tempering heat treatment processes. The steel in the present invention has high strength and good impact toughness, good elongation and reduction of area. The steel can also resist stress corrosion cracking and have good weather resistance, wear resistance and fatigue resistance, which can be used in scenarios where the steel having high strength and toughness is required, such as construction machinery and marine engineering.

8. 发明公开

EP3885463A1 STEEL FOR HIGH-STRENGTH ALUMINUM CLAD SUBSTRATE AND MANUFACTURING METHOD THEREFOR 审中-公开
公开(公告)号：EP3885463A1
公开(公告)日：2021-09-29
申请号：EP19902991.9
申请日：2019-12-24
申请人： BAOSHAN IRON & STEEL CO., LTD.
发明人： SONG, Fengming , WANG, Wei , HU, Xiaoping , WEN, Donghui , LIU, Yunhua , WANG, Junkai
IPC分类号： C22C38/02 , C22C38/04 , C22C38/06 , C22C38/14 , C21D8/02
摘要： A steel for high-strength aluminum clad substrate, comprising the following chemical elements by mass percent: C: 0.008-0.02%, 0

9. 发明授权

EP3235920B1 LOW-YIELD-RATIO ULTRA-HIGH-STRENGTH HOT-ROLLED Q&P STEEL AND PRODUCTION METHOD THEREFOR 有权转让
公开(公告)号：EP3235920B1
公开(公告)日：2019-11-20
申请号：EP15869172.5
申请日：2015-11-24
申请人： BAOSHAN IRON & STEEL CO., LTD.
发明人： WANG, Huanrong , YANG, Ana , WANG, Wei
IPC分类号： C22C38/14 , C22C38/12 , C21D8/02 , C21D6/00 , C21D9/46 , C21D1/18 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/00 , B22D7/00 , C21C7/10 , C22C33/04

10. 发明公开

EP3235924A1 QUENCHED-TEMPERED HIGH-STRENGTH STEEL WITH YIELD STRENGTH OF 900 MPA TO 1000 MPA GRADE, AND MANUFACTURING METHOD THEREFOR 有权
标题翻译：屈服强度900〜1000MPa的淬火高强度钢及其制造方法
公开(公告)号：EP3235924A1
公开(公告)日：2017-10-25
申请号：EP15869229.3
申请日：2015-12-08
申请人： Baoshan Iron & Steel Co., Ltd.
发明人： YANG, Ana , LIU, Gang , WANG, Wei , YANG, Xiaozhen
IPC分类号： C22C38/58 , C22C38/54 , C21D8/02
CPC分类号： C21D9/46 , C21D1/18 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/02 , C21D8/0205 , C21D8/0226 , C21D8/0247 , C21D2211/008 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/06 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/58
摘要： A quenched-tempered high-strength steel having a yield strength of 900-1000 MPa grade and a method of producing the same, with the components and amounts thereof by weight percentage being: C:0.16-0.20%, Si: 0.10-0.30%, Mn: 0.80-1.60%, Cr: 0.20-0.70%, Mo: 0.10-0.45%, Ni: 0.10-0.50%, Nb: 0.010-0.030%, Ti: 0.010-0.030%, V: 0.010-0.050%, B: 0.0005-0.0030%, Al: 0.02-0.06%, Ca: 0.001-0.004%, N: 0.002-0.005%, P≤0.020%, S≤0.010%, 0≤0.008%, and the balance of Fe and unavoidable impurities, and Ceq 0.51-0.60%, Ceq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15; 3.7≤Ti/N≤7.0; 1.0≤Ca/S≤3.0; 0.8%≤Mo+0.8Ni+0.4Cr+6V≤1.3%. By using a process of controlling rolling, controlling cooling, and off-line quenching + tempering, a steel sheet produced according to the disclosure has a yield strength of 900-1080MPa, a tensile strength of 950-1200MPa, an elongation >10%, and an impact energy at - 40°C >40J.
摘要翻译：一种具有900-1000MPa级屈服强度的淬火回火高强度钢及其制造方法，其组分和量按重量百分比为：C：0.16-0.20％，Si：0.10-0.30％，Mn：0.80-1.60％，Cr：0.20-0.70％，Mo：0.10-0.45％，Ni：0.10-0.50％，Nb：0.010-0.030％，Ti：0.010-0.030％，V：0.010-0.050％ B：0.0005-0.0030％，Al：0.02-0.06％，Ca：0.001-0.004％，N：0.002-0.005％，P≤0.020％，S≤0.010％，0≤0.008％，其余为Fe和不可避免的杂质和Ceq 0.51-0.60％，Ceq = C + Mn / 6 +（Cr + Mo + V）/ 5 +（Ni + Cu）/ 15; 3.7≤Ti/N≤7.0; 1.0≤Ca/S≤3.0; 0.8％≤Mo+ 0.8Ni + 0.4Cr +6V≤1.3％。通过使用控制轧制，控制冷却和离线淬火+回火的方法，根据本公开制造的钢板具有900-1080MPa的屈服强度，950-1200MPa的拉伸强度，> 10％的伸长率，在-40°C> 40J的冲击能量。

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