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公开(公告)号：US12163199B2
公开(公告)日：2024-12-10
申请号：US18245337
申请日：2021-01-07
Inventor： Zhaoxia Liu , Xiaohong Xu , Yun Bai , Pifeng Miao , Jun Liu , Buqiang Han , Yonghao Zhou , Jinming Wu , Jun Gao , Guozhong Li , Menglong Di , Yu Meng , Shuquan Liao , Sha Lu , Liang Gao
IPC: C21D8/02 , C21D1/19 , C21D9/46 , C22C33/04 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12
Abstract: Disclosed is a method for manufacturing a 5Ni steel plate with a low remanence and an excellent surface quality to be used in a ship. The process flow thereof comprises: converter smelting→LF refining→RH high vacuum degassing→treatment with Ca→continuous casting→a slow cooling treatment to the slab→cleaning the surface of the slab→heating→rolling→quenching twice→tempering. The constituents comprise a low content of carbon, a low content of silicon, and 5% Ni, with V and Nb being added thereto, which improves the hardenability, improves the toughness at a low temperature, and improves the starting temperature of non-recrystallization of austenite. The steel plate can be subjected to high-temperature rolling and high-temperature quenching so as to significantly improve the shape of the plate, thus being applicable to the production of thin products.
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公开(公告)号：US20240254577A1
公开(公告)日：2024-08-01
申请号：US18632418
申请日：2024-04-11
Inventor： Jiaolong ZHAI , Yun BAI , Qihang FAN , Xiaolin WU , Qian LIU , Shuyan SHAO , Yun LI , Kui ZHANG , Zelei CHEN , Qian LI , Lei GAO , Yu MENG , Shuquan LIAO , Sha LU
IPC: C21D1/32 , C21C5/28 , C21D1/18 , C21D8/02 , C22C38/00 , C22C38/06 , C22C38/34 , C22C38/42 , C22C38/44 , C22C38/50 , C22C38/58 , C22C38/60
CPC classification number: C21D1/32 , C21C5/28 , C21D1/18 , C21D8/021 , C22C38/002 , C22C38/06 , C22C38/34 , C22C38/42 , C22C38/44 , C22C38/50 , C22C38/58 , C22C38/60 , C21D2211/003 , C21D2211/005
Abstract: The present disclosure relates to a spheroidizing-annealed steel for the ball screw having high strength and resistance to low temperatures, wherein the chemical composition of the steel in mass percentage is: C: 0.40-0.70%, Si: 1.20-1.80%, Mn: 1.00-1.60%, Cr: 0.80-1.20%, S: ≤0.025%, P≤0.025%, Ni: 0.10-0.60%, Cu: 0.30-0.80%, Mo: 0.10-0.40%, Al≤0.05%, Ca≤0.0010%, Ti≤0.003%, O≤0.0010%, As≤0.04%, Sn≤0.03%, Sb≤0.005%, Pb≤0.002%, the balance is Fe and unavoidable impurities. In microstructure of the steel, cementite exists in a spheroidized state with a diameter of 0.1-0.5 μm, preferably 0.3-0.5 μm, a spheroidizing rate is 95% or more, and the rest is ferrite.
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公开(公告)号：US20220364199A1
公开(公告)日：2022-11-17
申请号：US17607869
申请日：2019-11-08
Applicant: JIANGYIN XINGCHENG GOLD MATERIALS CO., LTD , JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO., LTD
Inventor： Lin ZHANG , Jianfeng ZHANG , Changhe LU , Yuehui GUAN , Guozhong LI , Xiaohong XU , Yun BAI , Hao ZONG , Jiafeng HE , De CHEN , Zhen HUANG , Jia YANG
IPC: C21D11/00 , C22C38/50 , C22C38/44 , C22C38/42 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D9/52 , C21D8/06 , C21D6/00
Abstract: A method for controlling carbide network in a bearing steel wire rod by controlling cooling and rolling, comprises the following steps: rapidly rolling a bar to a wire rod and spinning it into a loose coil, controlling the rolling temperature at 780° C.-880° C.; and the spinning temperature at 750° C.-850° C.; carrying out on-line controlling cooling of continuous loose coils using EDC water bath austempering cooling process, controlling the cooling rate at 2.0° C./s-10° C./s, and controlling the final cooling temperature within 620-630° C.; after EDC water bath austempering cooling, using slow cooling under a cover, and the temperature is controlled to be 400° C.-500° C. when being removed out of the cover; after slow cooling, collecting coils, and cooling in air to the room temperature.
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4.发明公开
公开(公告)号：US20240344160A1
公开(公告)日：2024-10-17
申请号：US18245337
申请日：2021-01-07
Inventor： Zhaoxia LIU , Xiaohong XU , Yun BAI , Pifeng MIAO , Jun LIU , Buqiang HAN , Yonghao ZHOU , Jinming WU , Jun GAO , Guozhong LI , Menglong DI , Yu MENG , Shuquan LIAO , Sha LU , Liang GAO
IPC: C21D8/02 , C21D1/19 , C21D9/46 , C22C33/04 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12
CPC classification number: C21D8/0226 , C21D1/19 , C21D8/0205 , C21D8/0273 , C21D9/46 , C22C33/04 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12
Abstract: Disclosed is a method for manufacturing a 5Ni steel plate with a low remanence and an excellent surface quality to be used in a ship. The process flow thereof comprises: converter smelting->LF refining->RH high vacuum degassing->treatment with Ca->continuous casting->a slow cooling treatment to the slab->cleaning the surface of the slab->heating->rolling->quenching twice->tempering. The constituents comprise a low content of carbon, a low content of silicon, and 5% Ni, with V and Nb being added thereto, which improves the hardenability, improves the toughness at a low temperature, and improves the starting temperature of non-recrystallization of austenite. The steel plate can be subjected to high-temperature rolling and high-temperature quenching so as to significantly improve the shape of the plate, thus being applicable to the production of thin products.
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5.发明授权
公开(公告)号：US10781510B2
公开(公告)日：2020-09-22
申请号：US15735489
申请日：2016-10-19
Inventor： Xianjin Sun , Zhuzhong Gao , Jianguo Hu , Jingtao Li , Pifeng Miao , Xiaolin Wu , Ailai Shi , Fu Zhao , Feng Xu , Shouyu Fang
IPC: C21D1/84 , C22C38/58 , C22C38/02 , C22C38/06 , C22C38/14 , C22C38/16 , C22C38/04 , C21D8/02 , C22C38/12 , C22C38/18 , C22C38/08 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C21D6/02
Abstract: An ultra-heavy steel plate with low cracking sensitivity and low yield ratio, the mass percentages of chemical components of the steel plate are C 0.05-0.09; Si 0.2-0.4; Mn 1.3-1.6; Al 0.02-0.04; Nb 0.03-0.08; V 0.03-0.08; Cr 0.1-0.5; Ni 0.1-0.5; Mo 0.1-0.3; Cu 0.2-0.5; Ti 0.01-0.02; P≤0.015; S≤0.003; N≤0.007, the balance being Fe and inevitable impurities; the carbon equivalent is ≤0.43, the cold cracking sensitivity coefficient Pcm is ≤0.20. A low cracking sensitivity and low yield ratio steel plate with a thickness of 40-70 mm is manufactured by the process steps of KR molten iron pretreatment-converter smelting-LF refining-RH vacuum degassing-continuous casting-lid-covering slow cooling for the continuous casting slabs-casting slabs heating-controlled rolling-controlled cooling-hot straightening-air cooling and so on.
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6.发明申请
公开(公告)号：US20180155810A1
公开(公告)日：2018-06-07
申请号：US15735489
申请日：2016-10-19
Inventor： Xianjin SUN , Zhuzhong GAO , Jianguo HU , Jingtao LI , Pifeng MIAO , Xiaolin WU , Ailai SHI , Fu ZHAO , Feng XU , Shouyu FANG
IPC: C22C38/58 , C21D8/02 , C21D1/84 , C22C38/50 , C22C38/48 , C22C38/46 , C22C38/44 , C22C38/42 , C22C38/06 , C22C38/02
Abstract: An ultra-heavy steel plate with low cracking sensitivity and low yield ratio, the mass percentages of chemical components of the steel plate are C 0.05-0.09; Si 0.2-0.4; Mn 1.3-1.6; Al 0.02-0.04; Nb 0.03-0.08; V 0.03-0.08; Cr 0.1-0.5; Ni 0.1-0.5; Mo 0.1-0.3; Cu 0.2-0.5; Ti 0.01-0.02; P≤0.015; S≤0.003; N≤0.007, the balance being Fe and inevitable impurities; the carbon equivalent is ≤0.43, the cold cracking sensitivity coefficient Pcm is ≤0.20. A low cracking sensitivity and low yield ratio steel plate with a thickness of 40-70 mm is manufactured by the process steps of KR molten iron pretreatment-converter smelting-LF refining-RH vacuum degassing-continuous casting-lid-covering slow cooling for the continuous casting slabs-casting slabs heating-controlled rolling-controlled cooling-hot straightening-air cooling and so on.
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7.发明申请
公开(公告)号：US20180100211A1
公开(公告)日：2018-04-12
申请号：US15836895
申请日：2017-12-10
Inventor： Min CHEN , Feng LI , Qing YIN , Jiaolong ZHAI , Ke GENG , Jianfeng ZHANG , Zhen HUANG , Jian BAO , Xiaojiang RUAN
IPC: C21D9/40 , B21B1/22 , C21D8/06 , C21D6/00 , C22C38/44 , C22C38/04 , C22C38/06 , C22C38/02 , C22C38/00 , C22C38/42 , C22C38/60 , C22C38/50
CPC classification number: C21D9/40 , B21B1/22 , B21B2001/225 , B22D11/001 , B22D11/115 , B22D11/1206 , B22D11/1213 , B22D11/122 , B22D11/18 , B60B27/02 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/065 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/18 , C22C38/20 , C22C38/22 , C22C38/28 , C22C38/40 , C22C38/42 , C22C38/44 , C22C38/50 , C22C38/60 , F16C19/186 , F16C2204/72
Abstract: A steel, including: between 0.45 and 0.70 wt. % of carbon, between 0.10 and 0.50 wt. % of silicon, between 0.30 and 0.70 wt. % of manganese, between 0.20 and 0.60 wt. % of chromium, less than or equal to 0.025 wt. % of phosphorus, between 0.003 and 0.030 wt. % of sulfur, less than or equal to 0.1 wt. % of molybdenum, less than or equal to 0.2 wt. % of nickel, less than or equal to 0.04 wt. % of aluminum, less than or equal to 0.3 wt. % of copper, less than or equal to 0.001 wt. % of calcium, less than or equal to 0.003 wt. % of titanium, less than or equal to 0.001 wt. % of oxygen, less than or equal to 0.04 wt. % of arsenic, less than or equal to 0.03 wt. % of tin.
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公开(公告)号：US12234522B2
公开(公告)日：2025-02-25
申请号：US17607869
申请日：2019-11-08
Applicant: JIANGYIN XINGCHENG GOLD MATERIALS CO., LTD , JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO., LTD
Inventor： Lin Zhang , Jianfeng Zhang , Changhe Lu , Yuehui Guan , Guozhong Li , Xiaohong Xu , Yun Bai , Hao Zong , Jiafeng He , De Chen , Zhen Huang , Jia Yang
IPC: C21D11/00 , C21D6/00 , C21D8/06 , C21D9/52 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/50
Abstract: A method for controlling carbide network in a bearing steel wire rod by controlling cooling and rolling, comprises the following steps: rapidly rolling a bar to a wire rod and spinning it into a loose coil, controlling the rolling temperature at 780° C.-880° C.; and the spinning temperature at 750° C.-850° C.; carrying out on-line controlling cooling of continuous loose coils using EDC water bath austempering cooling process, controlling the cooling rate at 2.0° C./s-10° C./s, and controlling the final cooling temperature within 620-630° C.; after EDC water bath austempering cooling, using slow cooling under a cover, and the temperature is controlled to be 400° C.-500° C. when being removed out of the cover; after slow cooling, collecting coils, and cooling in air to the room temperature.
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9.发明公开
公开(公告)号：US20230323494A1
公开(公告)日：2023-10-12
申请号：US17927881
申请日：2020-04-09
Inventor： Zhaoxia LIU , Guozhong LI , Xiaohong XU , Yun BAI , Pifeng MIAO , Jun LIU , Yonghao ZHOU , Buqiang HAN , Jinming WU
CPC classification number: C21D8/0226 , C21D8/0273 , C21D9/46 , C21D8/0205 , C21D8/0278 , C22C38/48 , C22C38/002 , C22C38/06 , C22C38/04 , C22C38/02 , C21D2211/005
Abstract: The invention relates to a 9Ni steel plate for ship LNG storage tank with high strength and low yield ratio. According to the mass percentage, the chemical constituents are C: 0.02-0.05%, Si: 0.10-0.30%, Mn: 0.50-0.80%, Ni: 8.90-9.50%, P: ≤0.0070%, s: ≤0.0020%, Cr: 0.10-0.25%, Alt: 0.010-0.035%, Nb: 0.010-0.020%, Ca: 0.0005-0.0030%, O: ≤0.0012%, N: ≤0.004%, H: ≤0.00015%, and the balance is Fe and unavoidable impurity elements. The production process flow is: smelting in a converter or electric furnace->RH vacuum degassing->LF refining->RH high vacuum degassing->Ca Treatment->continuous casting->slab slow cooling treatment->slab surface cleaning->heating->rolling ->quenching->tempering. For the 9Ni steel, especially the 9Ni thin steel plate, the invention adopts the constituents design of low C, 9% Ni, addition of Nb and Cr. The steel plate is subject to high-temperature hot rolling, and then QLT heat treatment process to obtain 9Ni steel with good strength, toughness and low yield ratio.
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10.发明公开
公开(公告)号：US20230203630A1
公开(公告)日：2023-06-29
申请号：US17927878
申请日：2020-04-09
Inventor： Jun LIU , Guozhong LI , Yang YANG , Xiaohong XU , Jinming WU , Pifeng MIAO , Guoqing XU , Xiaoshuang WANG
CPC classification number: C22C38/54 , C22B9/04 , C22B9/18 , C21D1/18 , C21D1/26 , C21D7/06 , C21D8/0263
Abstract: The invention relates to a wear-resistant steel with excellent surface quality, which is composed of C: 0.12-0.20%, Si: ≤0.1%, Mn: 0.6-1.20%, Nb: 0.010-0.040%, V: ≤0.01%, Ti: 0.010%-0.030, Al: ≤0.04%, Ni: ≤0.1%, Cu: ≤0.1%, Cr: 0.10-0.40%, Mo: ≤0.1%, B: 0.001-0.005%, Ca: 0.0010-0.0050%, P: ≤0.010%, S: ≤0.0015%, O: ≤0.0012%, N: ≤0.0035%, H: ≤0.0002%, the balance is Fe, and the carbon equivalent CEV≤0.4; PCM≤0.25. The production process flow is: converter smelting->LF refining->VD or Rh high vacuum degassing->continuous casting->heating->rolling->shot blasting->quenching->tempering. The wear-resistant steel of the invention has better surface quality, and there are no surface defects such as air pit, inclusion, hemp pit and pressed iron oxide scale. The depth of surface spots caused by the peeling off iron oxide scale is ≤0.1 mm, and the surface grinding of steel plate cannot be carried out. Based on element design, non-preheating welding and excellent toughness can be further realized.
