CN116555684A - 一种钒微合金化高强贝氏体钢轨及其制造方法 - Google Patents
一种钒微合金化高强贝氏体钢轨及其制造方法 Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 71
- 239000010959 steel Substances 0.000 title claims abstract description 71
- 229910001563 bainite Inorganic materials 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 10
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 25
- 238000005266 casting Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 20
- 238000005096 rolling process Methods 0.000 claims description 20
- 238000010079 rubber tapping Methods 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 16
- 238000007664 blowing Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 15
- 238000009849 vacuum degassing Methods 0.000 claims description 15
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 238000009749 continuous casting Methods 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 10
- 238000005496 tempering Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 6
- 230000004048 modification Effects 0.000 claims description 6
- 238000012986 modification Methods 0.000 claims description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 5
- 238000003723 Smelting Methods 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 229910052788 barium Inorganic materials 0.000 claims description 5
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 5
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 5
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 5
- 239000000378 calcium silicate Substances 0.000 claims description 5
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 5
- 230000003009 desulfurizing effect Effects 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 5
- 239000010436 fluorite Substances 0.000 claims description 5
- 239000004571 lime Substances 0.000 claims description 5
- 239000011574 phosphorus Substances 0.000 claims description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 238000007670 refining Methods 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000011593 sulfur Substances 0.000 claims description 5
- 229910052717 sulfur Inorganic materials 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000002572 peristaltic effect Effects 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims 1
- 230000009467 reduction Effects 0.000 description 5
- 229910001566 austenite Inorganic materials 0.000 description 3
- 229910000734 martensite Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
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- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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Abstract
本发明公开了一种钒微合金化高强贝氏体钢轨,其质量百分数的化学成分包括:C:0.16~0.25%;Si:0.80~1.20%;Mn:1.60~2.45%;P≤0.022%;S≤0.015%;V:0.05~0.09%;Cr:0.60~1.20%;Ni:0.030.08%;Mo:0.30~0.40%,其余为Fe及不可避免的杂质,还公布了其制造方法,本发明通过添加V合金化来替代部分Ni合金含量,从而调整并优化贝氏体钢轨成分范围,降低生产成本,优化钢轨组织结构,保证钢轨性能满足屈服强度≥1000MPa、抗拉强度≥1280MPa,延伸率≥12%,踏面硬度370~440HBW,室温冲击功≥70J。
Description
技术领域
本发明涉及钢轨生产及应用领域,尤其涉及一种钒微合金化高强贝氏体钢轨及其制造方法。
背景技术
我国铁路正面向高速化、大运量化发展,对于钢轨的耐磨性、韧性和安全性等指标逐步提升,铁路线一般使用U75V和U71Mn作为道岔钢轨,但随着客货混运和货运重载线路的不断发展,对道岔的使用寿命提出了更高的要求,尖轨和辙叉在车轮强大的冲击下,接触应力达到甚至超过1400MPa,接触表面经常出现剥离掉块的显现,是钢轨使用寿命受到很大的影响,采用贝氏体辙叉钢轨在保证高强度的条件下,任然能保持很高的韧性,极大的延长辙叉钢轨使用寿命,相比珠光体型道岔钢轨,使用寿命可提高3倍以上,并且韧性的提高,极大的保证了列车的运行安全性。
发明内容
本发明的目的是提供一种钒微合金化高强贝氏体钢轨及其制造方法,再传统贝氏体钢轨的成分范围基础上,通过添加V合金化来替代部分Ni合金含量,从而调整并优化贝氏体钢轨成分范围,降低生产成本,优化钢轨组织结构,保证钢轨性能满足屈服强度≥1000MPa、抗拉强度≥1280MPa,延伸率≥12%,踏面硬度370~440HBW,室温冲击功≥70J的技术指标要求。
为解决上述技术问题,本发明采用如下技术方案:
本发明一种钒微合金化高强贝氏体钢轨,所述贝氏体钢轨质量百分数计其化学成分包括:C:0.16~0.25%;Si:0.80~1.20%;Mn:1.60~2.45%;P≤0.022%;S≤0.015%;V:0.05~0.09%;Cr:0.60~1.20%;N i:0.030.08%;Mo:0.30~0.40%,其余为Fe及不可避免的杂质。
一种钒微合金化高强贝氏体钢轨的制造方法,包括以下步骤:
1)铁水预处理:铁水中的硫含量≤0.015%(优选0.011%),磷含量≤0.022%(优选0.10%);
2)转炉冶炼:控制出钢C含量≥0.08%,出钢温度≥1550℃,出钢后加入白灰、硅钙钡和萤石,进行脱氧和对炉渣改质,出钢过程中保证吹氩效果,钢水精炼就位时顶渣没有结坨现象;
3)LF炉精炼:根据转炉钢水成分及温度进行脱硫,成分微调及升温操作;
4)VD真空脱气:深真空脱气时间≥15mi n,真空脱气后软吹≥18mi n,软吹过程氩气流量稳定,钢液蠕动并无裸露;
5)连铸:连铸过程采用保护浇铸,采用低铝保护渣,二冷段采用弱冷配水,全程恒拉速操作,拉速0.60m/mi n,开启铸机电磁搅拌和轻压下,保证铸坯质量。
6)钢坯加热:加热时间≥4小时,加热温度≥1200℃;
7)钢坯轧制:开轧温度1150~1250℃,终轧温度900~980℃,钢坯经过13道次轧制,终轧后进入冷床以0.3℃/s的冷速冷却至室温,采用260℃+24小时回火热处理,钢轨回火热处理后缓慢冷却至室温。
进一步的,所制造的贝氏体钢轨钢轨性能满足屈服强度≥1000MPa、抗拉强度≥1280MPa,延伸率≥12%,踏面硬度370~440HBW,室温冲击功≥70J。
与现有技术相比,本发明的有益技术效果:
钢轨冷却至室温后检测力学性能,满足保证钢轨性能满足屈服强度≥1000MPa、抗拉强度≥1280MPa,延伸率≥12%,踏面硬度370~440HBW,室温冲击功≥70J的技术指标要求。
具体实施方式
下面结合具体实施例子对本发明作进一步的详细说明,以便于更加清楚地了解本发明。
对比例1
本发明的生产方法用于特定成分范围的贝氏体钢轨,这种特定贝氏体钢轨质量百分数计其化学成分包括:C:0.20%;Si:0.90%;Mn:2.20%;P:0.012%;S:0.008%;Cr:0.90%;Ni:0.60%;Mo:0.38%,其余为Fe及不可避免的杂质。
具体生产步骤:
1)铁水预处理:铁水中的硫含量0.011%,磷含量0.10%。
2)转炉冶炼:控制出钢C含量0.10%,出钢温度1560℃,出钢后加入白灰、硅钙钡和萤石,进行脱氧和对炉渣改质,出钢过程中保证吹氩效果,钢水精炼就位时顶渣没有结坨现象。
3)LF炉精炼:根据转炉钢水成分及温度进行脱硫,成分微调及升温操作。
4)VD真空脱气:深真空脱气时间16mi n,真空脱气后软吹18mi n,软吹过程氩气流量稳定,钢液蠕动并无裸露。
5)连铸:连铸过程采用保护浇铸,采用低铝保护渣,二冷段采用弱冷配水,全程恒拉速操作,拉速0.60m/mi n,开启铸机电磁搅拌和轻压下,保证铸坯质量。
6)钢坯加热:加热时间4.5小时,加热温度1250℃。
7)钢坯轧制:开轧温度1140℃,终轧温度950℃,钢坯经过13道次轧制,终轧后进入冷床以0.3℃/s的冷速冷却至室温,采用250℃+24小时回火热处理,回火热处理后钢轨缓慢冷却至室温。
钢轨冷却后检测力学性能,屈服强度1131MPa、抗拉强度1332MPa,延伸率14%,踏面硬度394HBW,室温冲击功89J,金相组织为贝氏体、马氏体和微量残余奥氏体。
对比例2
本发明的生产方法用于特定成分范围的贝氏体钢轨,这种特定贝氏体钢轨质量百分数计其化学成分包括:C:0.20%;Si:0.90%;Mn:2.20%;P:0.012%;S:0.008%;Cr:0.90%;Ni:0.05%;Mo:0.38%,其余为Fe及不可避免的杂质。
具体生产步骤:
1)铁水预处理:铁水中的硫含量0.011%,磷含量0.10%。
2)转炉冶炼:控制出钢C含量0.10%,出钢温度1560℃,出钢后加入白灰、硅钙钡和萤石,进行脱氧和对炉渣改质,出钢过程中保证吹氩效果,钢水精炼就位时顶渣没有结坨现象。
3)LF炉精炼:根据转炉钢水成分及温度进行脱硫,成分微调及升温操作。
4)VD真空脱气:深真空脱气时间16mi n,真空脱气后软吹18mi n,软吹过程氩气流量稳定,钢液蠕动并无裸露。
5)连铸:连铸过程采用保护浇铸,采用低铝保护渣,二冷段采用弱冷配水,全程恒拉速操作,拉速0.60m/mi n,开启铸机电磁搅拌和轻压下,保证铸坯质量。
6)钢坯加热:加热时间4.5小时,加热温度1250℃。
7)钢坯轧制:开轧温度1140℃,终轧温度950℃,钢坯经过13道次轧制,终轧后进入冷床以0.3℃/s的冷速冷却至室温,采用250℃+24小时回火热处理,回火热处理后钢轨缓慢冷却至室温。
钢轨冷却后检测力学性能,屈服强度932MPa、抗拉强度1219MPa,踏面硬度364HBW,延伸率14.5%,室温冲击功63J,金相组织为贝氏体、马氏体和微量残余奥氏体。
实施例1
本发明的生产方法用于特定成分范围的贝氏体钢轨,这种特定贝氏体钢轨质量百分数计其化学成分包括:C:0.20%;Si:0.90%;Mn:2.20%;P:0.012%;S:0.008%;Cr:0.90%;Ni:0.05%;Mo:0.38%;V:0.08%,其余为Fe及不可避免的杂质。
具体生产步骤:
1)铁水预处理:铁水中的硫含量0.011%,磷含量0.10%。
2)转炉冶炼:控制出钢C含量0.10%,出钢温度1560℃,出钢后加入白灰、硅钙钡和萤石,进行脱氧和对炉渣改质,出钢过程中保证吹氩效果,钢水精炼就位时顶渣没有结坨现象。
3)LF炉精炼:根据转炉钢水成分及温度进行脱硫,成分微调及升温操作。
4)VD真空脱气:深真空脱气时间16mi n,真空脱气后软吹18mi n,软吹过程氩气流量稳定,钢液蠕动并无裸露。
5)连铸:连铸过程采用保护浇铸,采用低铝保护渣,二冷段采用弱冷配水,全程恒拉速操作,拉速0.60m/mi n,开启铸机电磁搅拌和轻压下,保证铸坯质量。
6)钢坯加热:加热时间4.5小时,加热温度1250℃。
7)钢坯轧制:开轧温度1140℃,终轧温度950℃,钢坯经过13道次轧制,终轧后进入冷床以0.3℃/s的冷速冷却至室温,采用250℃+24小时回火热处理,回火热处理后钢轨缓慢冷却至室温。
钢轨冷却后检测力学性能,钢轨屈服强度1056MPa、抗拉强度1348MPa,踏面硬度397HBW,延伸率14.5%,室温冲击功92J,金相组织为贝氏体、马氏体和残余奥氏体。
通过对比可知:实施例1按照本发明制定的生产制造方法生产的贝氏体钢轨,钢轨强度高,韧性好,并且合金加入量更少,有效的降低了生产成本,经济适用性优良。
以上所述的实施例仅是对本发明的优选方式进行描述,并非对本发明的范围进行限定,在不脱离本发明设计精神的前提下,本领域普通技术人员对本发明的技术方案做出的各种变形和改进,均应落入本发明权利要求书确定的保护范围内。
Claims (3)
1.一种钒微合金化高强贝氏体钢轨,其特征在于:所述贝氏体钢轨质量百分数计其化学成分包括:C:0.16~0.25%;Si:0.80~1.20%;Mn:1.60~2.45%;P≤0.022%;S≤0.015%;V:0.05~0.09%;Cr:0.60~1.20%;Ni:0.030.08%;Mo:0.30~0.40%,其余为Fe及不可避免的杂质。
2.根据权利要求1所述的钒微合金化高强贝氏体钢轨的制造方法,其特征在于:包括以下步骤:
1)铁水预处理:铁水中的硫含量≤0.015%,磷含量≤0.022%;
2)转炉冶炼:控制出钢C含量≥0.08%,出钢温度≥1550℃,出钢后加入白灰、硅钙钡和萤石,进行脱氧和对炉渣改质,出钢过程中保证吹氩效果,钢水精炼就位时顶渣没有结坨现象;
3)LF炉精炼:根据转炉钢水成分及温度进行脱硫,成分微调及升温操作;
4)VD真空脱气:深真空脱气时间≥15min,真空脱气后软吹≥18min,软吹过程氩气流量稳定,钢液蠕动并无裸露;
5)连铸:连铸过程采用保护浇铸,采用低铝保护渣,二冷段采用弱冷配水,全程恒拉速操作,拉速0.60m/min,开启铸机电磁搅拌和轻压下,保证铸坯质量。
6)钢坯加热:加热时间≥4小时,加热温度≥1200℃;
7)钢坯轧制:开轧温度1150~1250℃,终轧温度900~980℃,钢坯经过13道次轧制,终轧后进入冷床以0.3℃/s的冷速冷却至室温,采用260℃+24小时回火热处理,钢轨回火热处理后缓慢冷却至室温。
3.根据权利要求2所述的钒微合金化高强贝氏体钢轨的制造方法,其特征在于:所制造的贝氏体钢轨钢轨性能满足屈服强度≥1000MPa、抗拉强度≥1280MPa,延伸率≥12%,踏面硬度370~440HBW,室温冲击功≥70J。
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103173679A (zh) * | 2013-03-16 | 2013-06-26 | 南阳汉冶特钢有限公司 | 一种100mm Q460qE桥梁钢板及其生产方法 |
CN107312976A (zh) * | 2017-06-19 | 2017-11-03 | 武汉钢铁有限公司 | 一种贝氏体钢轨及生产方法 |
CN109023035A (zh) * | 2017-06-08 | 2018-12-18 | 武汉钢铁有限公司 | 超低铝含量高强度贝氏体钢轨钢及其生产方法 |
CN109023060A (zh) * | 2018-08-28 | 2018-12-18 | 包头钢铁(集团)有限责任公司 | 钢轨和钢轨的生产方法 |
CN110468347A (zh) * | 2019-09-02 | 2019-11-19 | 鞍钢股份有限公司 | 一种高强韧性贝氏体钢轨及其制造方法 |
CN114015945A (zh) * | 2021-11-09 | 2022-02-08 | 攀钢集团攀枝花钢铁研究院有限公司 | 一种具有均匀硬度梯度的贝氏体钢轨及其生产方法 |
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Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103173679A (zh) * | 2013-03-16 | 2013-06-26 | 南阳汉冶特钢有限公司 | 一种100mm Q460qE桥梁钢板及其生产方法 |
CN109023035A (zh) * | 2017-06-08 | 2018-12-18 | 武汉钢铁有限公司 | 超低铝含量高强度贝氏体钢轨钢及其生产方法 |
CN107312976A (zh) * | 2017-06-19 | 2017-11-03 | 武汉钢铁有限公司 | 一种贝氏体钢轨及生产方法 |
CN109023060A (zh) * | 2018-08-28 | 2018-12-18 | 包头钢铁(集团)有限责任公司 | 钢轨和钢轨的生产方法 |
CN110468347A (zh) * | 2019-09-02 | 2019-11-19 | 鞍钢股份有限公司 | 一种高强韧性贝氏体钢轨及其制造方法 |
CN114015945A (zh) * | 2021-11-09 | 2022-02-08 | 攀钢集团攀枝花钢铁研究院有限公司 | 一种具有均匀硬度梯度的贝氏体钢轨及其生产方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117327985A (zh) * | 2023-10-24 | 2024-01-02 | 包头钢铁(集团)有限责任公司 | 一种B、Ti微合金化热轧态贝氏体钢轨及其制造方法 |
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