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1. 发明申请

US20170044721A1 HYPEREUTECTOID STEEL RAIL AND PREPARATION METHOD THEREOF 审中-公开
标题翻译：超高铁钢铁及其制备方法
公开(公告)号：US20170044721A1
公开(公告)日：2017-02-16
申请号：US15231843
申请日：2016-08-09
申请人： PANGANG GROUP PANZHIHUA IRON & STEEL RESEARCH INSTITUTE CO., LTD. , PANGANG GROUP PANZHIHUA STEEL & VANADIUM CO., LTD.
发明人： Zhenyu Han , Ming Zou , Hua Guo , Yuan Wang , Dadong Li , Yong Deng , Jun Yuan
IPC分类号： E01B5/02 , C22C38/46 , C22C38/42 , C22C38/04 , C21D1/60 , C22C38/00 , C21D9/04 , C21D8/00 , C21D1/613 , C22C38/48 , C22C38/02
CPC分类号： E01B5/02 , C21D1/60 , C21D1/613 , C21D8/005 , C21D9/04 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/42 , C22C38/46 , C22C38/48
摘要： The present invention discloses a method for preparing hypereutectoid steel rail in which the composition of the billets adopted is: C: 0.86-1.05 wt. %; Si: 0.3-1 wt. %; Mn: 0.5-1.3 wt. %; Cr: 0.15-0.35 wt. %; Cu: 0.3-0.5 wt. %; P: 0.02-0.04 wt. %; S: ≦0.02 wt. %; Ni: ½-⅔ of the content of Cu; at least one of V, Nb and Re; Fe and unavoidable impurities of the rest. The present invention further provides a hypereutectoid steel rail prepared by the foregoing method. By the hypereutectoid steel rail preparation method provided by the present invention, the high-carbon billets with a specific composition provided by the present invention can be made into hypereutectoid steel rails with good corrosion resistance and tensile properties.
摘要翻译：本发明公开了一种制备过共析钢轨的方法，其中采用的坯料组成为：C：0.86-1.05wt。％; Si：0.3-1重量％％; Mn：0.5-1.3重量％％; Cr：0.15-0.35wt。％; Cu：0.3〜0.5重量％％; P：0.02-0.04重量％％; S：≤0.02重量％％; Ni：Cu含量的1/2;; V，Nb和Re中的至少一种; Fe和其余的不可避免的杂质。本发明还提供一种通过上述方法制备的过共析钢轨。通过本发明提供的过共析钢轨制备方法，本发明提供的具有特定组成的高碳钢坯可以制成具有良好耐腐蚀性和拉伸性能的过共析钢轨。

2. 发明授权

US10214799B2 Heat treatment method for increasing the depth of hardening layer in a steel rail and steel rail obtained with the method 有权
公开(公告)号：US10214799B2
公开(公告)日：2019-02-26
申请号：US14798980
申请日：2015-07-14
申请人： PanGang Group Panzhihua Iron & Steel Research Institute Co., Ltd. , Pangang Group panzhihua Steel & Vanadium CO., Ltd.
发明人： Zhenyu Han , Ming Zou , Jihai Jia , Hua Guo , Dadong Li , Yong Deng , Chunjian Wang , Jun Yuan , Chongmu Chen
IPC分类号： C21D9/04 , C22C38/24 , C22C38/04 , C22C38/02
摘要： The present invention relates to a heat treatment method for increasing the depth of hardening layer in a steel rail, and belongs to the field of steel rail production process. The technical problem to be solved in the present invention is to provide a heat treatment method for increasing the depth of hardening layer in a steel rail and a steel rail obtained with the method. The method comprises the following steps: cooling a finished rolling steel rail by natural cooling, till the temperature at the center of rail head surface is 660˜730° C.; cooling the steel rail by accelerated cooling at 1.5˜3.5° C./s cooling rate, till the temperature at the center of rail head surface is 500˜550° C.; increasing the cooling rate by 1.0˜2.0° C./s and further cooling down the steel rail, till the temperature at the center of rail head surface is 450° C. or lower; then, stopping the accelerated cooling, and cooling down the steel rail by air cooling to room temperature. With the heat treatment method disclosed in the present invention, a deep-hardening layer thicker than 25 mm can be obtained in the rail head part, the portion within 25 mm depth below the surface layer of rail head has hardness equivalent to the hardness of the surface layer of rail head, and the rail head is in a pearlite structure across its cross section. Thus, the service performance of the steel rail against the wearing incurred by the contact between the train wheels and the steel rails can be improved.

3. 发明授权

US10196781B2 Hypereutectoid steel rail and preparation method thereof 有权
公开(公告)号：US10196781B2
公开(公告)日：2019-02-05
申请号：US15231843
申请日：2016-08-09
申请人： PANGANG GROUP PANZHIHUA IRON & STEEL RESEARCH INSTITUTE CO., LTD. , PANGANG GROUP PANZHIHUA STEEL & VANADIUM CO., LTD.
发明人： Zhenyu Han , Ming Zou , Hua Guo , Yuan Wang , Dadong Li , Yong Deng , Jun Yuan
IPC分类号： C21D1/60 , C21D8/00 , C21D9/04 , E01B5/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/42 , C22C38/46 , C22C38/48 , C21D1/613
摘要： The present invention discloses a method for preparing hypereutectoid steel rail in which the composition of the billets adopted is: C: 0.86-1.05 wt. %; Si: 0.3-1 wt. %; Mn: 0.5-1.3 wt. %; Cr: 0.15-0.35 wt. %; Cu: 0.3-0.5 wt. %; P: 0.02-0.04 wt. %; S: ≤0.02 wt. %; Ni: ½-⅔ of the content of Cu; at least one of V, Nb and Re; Fe and unavoidable impurities of the rest. The present invention further provides a hypereutectoid steel rail prepared by the foregoing method. By the hypereutectoid steel rail preparation method provided by the present invention, the high-carbon billets with a specific composition provided by the present invention can be made into hypereutectoid steel rails with good corrosion resistance and tensile properties.

4. 发明申请

US20160010188A1 HEAT TREATMENT METHOD FOR INCREASING THE DEPTH OF HARDENING LAYER IN A STEEL RAIL AND STEEL RAIL OBTAINED WITH THE METHOD 审中-公开
标题翻译：热处理方法，用于增加钢铁和钢铁中硬化层深度的方法
公开(公告)号：US20160010188A1
公开(公告)日：2016-01-14
申请号：US14798980
申请日：2015-07-14
申请人： PanGang Group Panzhihua Iron & Steel Research Institute Co., Ltd. , Pangang Group panzhihua Steel & Vanadium Co., Ltd.
发明人： Zhenyu Han , Ming Zou , Jihai Jia , Hua Guo , Dadong Li , Yong Deng , Chunjian Wang , Jun Yuan , Chongmu Chen
IPC分类号： C22C38/24 , C22C38/02 , C22C38/04 , C21D9/04 , C21D6/00
CPC分类号： C22C38/24 , C21D9/04 , C21D2211/009 , C21D2221/10 , C22C38/02 , C22C38/04
摘要： The present invention relates to a heat treatment method for increasing the depth of hardening layer in a steel rail, and belongs to the field of steel rail production process. The technical problem to be solved in the present invention is to provide a heat treatment method for increasing the depth of hardening layer in a steel rail and a steel rail obtained with the method. The method comprises the following steps: cooling a finished rolling steel rail by natural cooling, till the temperature at the center of rail head surface is 660˜730° C.; cooling the steel rail by accelerated cooling at 1.5˜3.5° C./s cooling rate, till the temperature at the center of rail head surface is 500˜550° C.; increasing the cooling rate by 1.0˜2.0° C./s and further cooling down the steel rail, till the temperature at the center of rail head surface is 450° C. or lower; then, stopping the accelerated cooling, and cooling down the steel rail by air cooling to room temperature. With the heat treatment method disclosed in the present invention, a deep-hardening layer thicker than 25 mm can be obtained in the rail head part, the portion within 25 mm depth below the surface layer of rail head has hardness equivalent to the hardness of the surface layer of rail head, and the rail head is in a pearlite structure across its cross section. Thus, the service performance of the steel rail against the wearing incurred by the contact between the train wheels and the steel rails can be improved.
摘要翻译：本发明涉及一种提高钢轨硬化层深度的热处理方法，属于钢轨生产工艺领域。本发明要解决的技术问题是提供一种用于增加用该方法获得的钢轨和钢轨中的硬化层的深度的热处理方法。该方法包括以下步骤：通过自然冷却冷却成品轧制钢轨，直到轨头表面中心的温度为660〜730℃。通过加速冷却，以1.5〜3.5℃/ s的冷却速度冷却钢轨，直到轨头表面中心的温度为500〜550℃。将冷却速度提高1.0〜2.0℃/ s，进一步冷却钢轨，直到轨头表面中心的温度为450℃以下; 然后停止加速冷却，并通过空气冷却至室温冷却钢轨。采用本发明公开的热处理方法，可以在钢轨头部中获得厚度大于25mm的深硬化层，轨道头表面下方25mm以内的部分的硬度等于钢轨头表面层，钢轨头横截面呈珠光体结构。因此，可以提高钢轨抵抗由车轮和钢轨之间的接触引起的磨损的维修性能。

5. 发明授权

US09765414B2 Heat treatment method of turnout track and the turnout track 有权
公开(公告)号：US09765414B2
公开(公告)日：2017-09-19
申请号：US14142268
申请日：2013-12-27
申请人： Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. , Pangang Group Panzhihua Steel & Vanadium Co., Ltd.
发明人： Ming Zou , Zhenyu Han , Dongsheng Mei , Yong Deng , Hua Guo , Quan Xu , Chunjian Wang
IPC分类号： C21D9/04 , C21D1/02 , C21D1/18 , E01B7/00
CPC分类号： C21D9/04 , C21D1/02 , C21D1/18 , E01B7/00
摘要： The present invention provides a heat treatment method of turnout track comprising performing an accelerated cooling on the turnout track to be treated having a railhead tread with a temperature of 650-900° C. so as to obtain the turnout track with full pearlite metallographic structure, wherein the accelerated cooling velocity performed on the working side of railhead of the turnout track is higher than that performed on the non-working side of the railhead of the turnout track. The present invention provides a turnout track obtained with a heat treatment process as depicted therein. The turnout track in present invention has good straightness; both the hardness and tensile strength of the working side of railhead are higher than that of the non-working side of railhead.

6. 发明申请

US20160194729A1 HIGH-STRENGTH AND HIGHLY FATIGUE-RESISTANT STEEL RAIL AND PRODUCTION METHOD THEREOF 审中-公开
标题翻译：高强度和高耐疲劳性钢铁及其生产方法
公开(公告)号：US20160194729A1
公开(公告)日：2016-07-07
申请号：US14990407
申请日：2016-01-07
申请人： PanGang Group Panzhihua Iron & Steel Research Institute Co., Ltd. , Pangang Group Panzhihua Steel & Vanadium Co., Ltd.
发明人： Yong Deng , Hua Guo , Ming Zou , Jihai Jia , Chunjian Wang , Zhenyu Han , Jun Yuan
IPC分类号： C21D9/04 , C22C38/48 , C22C38/46 , C22C38/44 , C22C38/04 , B22D11/00 , C22C38/00 , C22C33/04 , C21D6/00 , C21D8/00 , C21D1/613 , C21D1/60 , C22C38/50 , C22C38/02
CPC分类号： C21D9/04 , B22D11/00 , B22D11/001 , C21D1/60 , C21D1/613 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/005 , C22C33/04 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50
摘要： The present invention relates to a high-strength, highly wear-resistant, and highly contact-fatigue-resistant steel rail and a production method thereof, and belongs to the field of black steel manufacturing technology. The present invention provides a high-strength and highly fatigue-resistant steel rail, comprising the following chemical components by weight percentage: C: 0.76%˜0.86%; Si: 0.6%˜1%; Mn: 0.7%˜1.5%, Cr: 0.1%˜0.5%, and 0.8%≦Mn %+Cr %≦1.6%; V: 0.05%˜0.3%, Ni: 0.1%˜0.35%, and 0.15%≦V %+Ni %≦0.4%; Mo: ≦0.03%; P: ≦0.02%; S: ≦0.015%; Fe and inevitable impurities: the remaining content, wherein, the metallurgical structure of the steel rail is fine pearlite+A, where, A is proeutectoid ferrite or proeutectoid cementite, and A≦2%. The tensile strength of the obtained steel rail is 1,260 MPa˜1,420 MPa.
摘要翻译：本发明涉及一种高强度，高耐磨，高接触疲劳的钢轨及其制造方法，属于黑钢制造技术领域。本发明提供一种高强度，高耐疲劳性的钢轨，其含有以下重量百分比的化学成分：C：0.76％〜0.86％ Si：0.6％〜1％; Mn：0.7％〜1.5％，Cr：0.1％〜0.5％，0.8％＆amp; NlE; Mn％+ Cr％＆nlE; 1.6％ V：0.05％〜0.3％，Ni：0.1％〜0.35％，0.15％＆amp; NlE; V％+ Ni％＆nlE; 0.4％ Mo：＆nlE; 0.03％; P：＆nlE; 0.02％; S：＆nlE; 0.015％; Fe和不可避免的杂质：其余含量，其中钢轨的冶金结构为细珠光体+ A，其中A为先共析铁素体或先共析渗碳体，A＆nlE为2％。得到的钢轨的拉伸强度为1,260MPa〜14220MPa。

7. 发明申请

US20140182751A1 HEAT TREATMENT METHOD OF TURNOUT TRACK AND THE TURNOUT TRACK 有权
标题翻译：热处理方法提供跟踪和转向跟踪
公开(公告)号：US20140182751A1
公开(公告)日：2014-07-03
申请号：US14142268
申请日：2013-12-27
申请人： Pangang Group Panzhihua Steel & Vanadium Co., Ltd. , Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd.
发明人： Ming Zou , Zhenyu Han , Dongsheng Mei , Yong Deng , Hua Guo , Quan Xu , Chunjian Wang
IPC分类号： C21D9/04 , E01B7/00
CPC分类号： C21D9/04 , C21D1/02 , C21D1/18 , E01B7/00
摘要： The present invention provides a heat treatment method of turnout track comprising performing an accelerated cooling on the turnout track to be treated having a railhead tread with a temperature of 650-900° C. so as to obtain the turnout track with full pearlite metallographic structure, wherein the accelerated cooling velocity performed on the working side of railhead of the turnout track is higher than that performed on the non-working side of the railhead of the turnout track. The present invention provides a turnout track obtained with a heat treatment process as depicted therein. The turnout track in present invention has good straightness; both the hardness and tensile strength of the working side of railhead are higher than that of the non-working side of railhead.
摘要翻译：本发明提供了一种道岔轨道的热处理方法，其特征在于，在具有650-900℃的铁轨胎面的待处理道岔轨迹上进行加速冷却，以获得具有完全珠光体金相组织的道岔轨道，其中在道岔轨道的轨道的工作侧执行的加速冷却速度高于轨道轨道的非工作侧所执行的加速冷却速度。本发明提供了如图所示的通过热处理工艺获得的道岔轨道。本发明的道岔轨迹具有良好的平直度; 铁轨工作侧的硬度和抗拉强度均高于铁轨非工作侧。

8. 发明授权

US09394581B2 Heat treatment method for bainitic turnout rail 有权
标题翻译：贝氏体导轨的热处理方法
公开(公告)号：US09394581B2
公开(公告)日：2016-07-19
申请号：US13974744
申请日：2013-08-23
申请人： PANGANG GROUP PANZHIHUA IRON & STEEL RESEARCH INSTITUTE CO., LTD.
发明人： Zhenyu Han , Ming Zou , Jihai Jia , Hua Guo , Yanzhong Wang , Jianhua Liu , Yong Deng , Chunjian Wang
IPC分类号： C21D9/04
CPC分类号： C21D9/04 , C21D2211/002
摘要： The present disclosure discloses a heat treatment method for a bainitic turnout rail, which includes: naturally cooling the turnout rail at a temperature in an austenite region after being finishing rolled to 450-480° C. at a tread center of a rail head of the turnout rail; accelerated cooling the naturally cooled turnout rail to 230-270° C. at the tread center of the rail head, a cooling rate at the tread center and a non-working side of the rail head being 1.5-5.0° C./s, a cooling rate at the working side of the rail head increasing by 0.1-1.0° C./s based on 1.5-5.0° C./s; continuously accelerated cooling the working side, the tread center and the non-working side of the rail head at a cooling rate of 0.05-0.25° C./s to decrease a temperature of the tread center of the rail head to 265-270° C.; and finally, naturally cooling the turnout rail to an ambient temperature.
摘要翻译：本发明公开了一种用于贝氏体轨道轨道的热处理方法，其包括：在所述轨道头的轨道头的胎面中心完成轧制后的奥氏体区域的温度下自然冷却所述轨道轨道道岔铁路在轨头的胎面中心将自然冷却的道岔轨道加速冷却至230-270℃，胎面中心处的冷却速度和轨头的非工作侧为1.5-5.0℃/ 轨头工作侧的冷却速度以1.5-5.0℃/ s的速度增加0.1-1.0℃/秒; 以0.05-0.25℃/ s的冷却速度连续加速冷却轨头的工作侧，胎面中心和非工作侧，将轨头的胎面中心的温度降低到265-270° C。; 最后自然地将道岔轨道冷却到环境温度。

9. 发明授权

US11655514B2 Deeply-hardened-surface turnout rail with high degree of undercooling and the preparation method thereof 有权
公开(公告)号：US11655514B2
公开(公告)日：2023-05-23
申请号：US17509375
申请日：2021-10-25
申请人： PANGANG GROUP PANZHIHUA IRON & STEEL RESEARCH INSTITUTE CO., LTD.
发明人： Jun Yuan , Ming Zou , Yong Deng , Ruoxi Li
IPC分类号： C21D9/04 , C22C38/24 , C22C38/04 , C22C38/02 , C22C38/00 , C21D8/00 , C21D6/00
CPC分类号： C21D9/04 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/005 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/24 , C21D2211/001
摘要： The invention relates to a turnout rail production technology, in particular to a deeply-hardened-surface turnout rail with high degree of undercooling and the preparation method thereof. The invention aims to solve the technical problem by providing a deeply-hardened-surface turnout rail with high degree of undercooling featured in even hardness distribution and a deeply hardened surface layer and the preparation method thereof. The method is described as follows: feeding molten iron for converter smelting→furnace rear argon blowing station→LF refining→RH vacuumization→casting steel blanks→slow cooling in the slow cooling pit→austenitic homogenization→rail rolling→heat treatment; in the converter smelting process, adding 0.2-0.3% Cr, 0.04-0.06 V and 0.75-0.80% C; the heat treatment process is divided into two cooling stages. The turnout rail prepared with the method described in the invention has a deeper deeply-hardened surface layer; the hardness is distributed more evenly, the anti-contact fatigue performance is higher and the resistance to wearing is ideal.

10. 发明授权

US09777351B2 Method for heat treatment of hypereutectoid steel rail 有权
公开(公告)号：US09777351B2
公开(公告)日：2017-10-03
申请号：US14583075
申请日：2014-12-24
申请人： PANGANG GROUP PANZHIHUA IRON & STEEL RESEARCH INSTITUTE CO., LTD.
发明人： Ming Zou , Zhenyu Han , Jihai Jia , Hua Guo , Yong Deng , Chunjian Wang , Jun Yuan , Hui Yao
IPC分类号： C21D9/04 , C21D6/00 , C22C38/24 , C21D1/18 , C22C38/02 , C22C38/04 , C22C38/18
CPC分类号： C22C38/24 , C21D1/18 , C21D6/002 , C21D6/005 , C21D6/008 , C21D9/04 , C21D2211/003 , C21D2211/009 , C22C38/02 , C22C38/04 , C22C38/18
摘要： The present invention discloses a method for heat treatment of hypereutectoid steel rail, including the following steps: holding the temperature of the steel rail of which temperature is above 900° C. after finish rolling, conducting a first cooling stage for the steel rail at the first cooling speed after the temperature holding to reduce the temperature of railhead surface layer of the steel rail to 700-750° C., conducting a second cooling stage for the steel rail at the second cooling speed to reduce the temperature of railhead surface layer of the steel rail to 550° C., conducting a third cooling stage for the steel rail at the third cooling speed to reduce the temperature of railhead surface layer of the steel rail to 450° C. or less, and continuing to cool the steel rail in the air. While obtaining good tensile property, the steel rail treated by the method for heat treatment provided by the present invention can effectively reduce secondary cementite and have excellent resistance to abrasion and contact fatigue. The product is particularly suitable for heavy rails.

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