CN107177799A - 90kg级高强度工程机械用钢板及其制造工艺 - Google Patents

90kg级高强度工程机械用钢板及其制造工艺 Download PDF

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CN107177799A
CN107177799A CN201710301702.7A CN201710301702A CN107177799A CN 107177799 A CN107177799 A CN 107177799A CN 201710301702 A CN201710301702 A CN 201710301702A CN 107177799 A CN107177799 A CN 107177799A
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steel
manufacturing process
engineering machinery
rolling
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高志国
岳长青
康利明
史文义
王海明
刘莉
张辉
乔通
陆斌
王俊刚
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Baotou Iron and Steel Group Co Ltd
Inner Mongolia Baotou Steel Union Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • 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
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • 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
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • 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
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • 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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

本发明涉及一种90Kg级高强度工程机械用钢板及其制造工艺。所述钢板以重量百分比计化学成分含量为：C 0.10‑0.16％，Si 0.25‑0.50％，Mn 1.4‑1.8％，P≤0.018％，S≤0.005％，Alt≥0.020％，Nb 0.030‑0.060％，V 0.040‑0.080％,Ti 0.008‑0.025％，Ni≤0.50，Cr≤0.50％，Mo≤0.40％，RE≤0.0010％，余量为Fe和不可避免的杂质。该钢板具有如下优点：碳当量低，焊接敏感指数低，冶炼成本低且不含B元素；强度余量适中，延伸率、冲击韧性余量大。

Description

90kg级高强度工程机械用钢板及其制造工艺
技术领域
本发明涉及材料成型技术领域，特别涉及一种90Kg级高强度工程机械用钢板及其制造工艺。
背景技术
目前，工程机械用钢板大多是通过热处理达到性能要求，如申请号为201110314501.3的“抗拉强度≥1100MPa的工程机械用钢及其制生产方法”的专利中通过淬火后低温回火钢板抗拉强度达到1100-1300MPa，文章“热处理对1000MPa级工程机械结构用钢组织和性能的影响”中所阐述的1000MPa级工程机械结构用钢设计方案中通过调质处理获得屈服强度为1030MPa高强度工程机械结构用钢。但从合金成分设计角度分析，上述专利或文献中所提及的工程机械用钢的设计中都添加了硼元素以提高钢板的淬透性。事实上，硼元素的添加会直接导致冲击功偏低，影响钢板的实际应用可靠性。
发明内容
有鉴于此，本发明提供一种90Kg级高强度工程机械用钢板及其制造工艺。
本发明提供一种90Kg级高强度工程机械用钢板，其以重量百分比计化学成分含量为：C 0.10-0.16％，Si 0.25-0.50％，Mn 1.4-1.8％，P≤0.018％，S≤0.005％，Alt≥0.020％，Nb 0.030-0.060％，V 0.040-0.080％,Ti 0.008-0.025％，Ni≤0.50，Cr≤0.50％，Mo≤0.40％，RE≤0.0010％，余量为Fe和不可避免的杂质。
本发明还提供一种上述钢板的制造工艺，其包括将钢坯依次进行加热、轧制和热处理；其中，
加热工序中，加热温度为1200-1250℃，加热时间≥200分钟，均热时间≥30分钟；
轧制工序中，开轧温度为1180-1230℃，精轧温度小于1050℃，终轧温度850-890℃；Acc终冷温度520-620℃；
热处理工艺中：淬火温度为880-950℃，回火温度为470-530℃。
进一步地，所述钢坯的厚度为250mm，最终制得的钢板的厚度为25-30mm。
进一步地，轧制工序中：高温延伸阶段单道次压下率为14.9-21.4％；精轧阶段单道次压下率为4.9-24.8％。
相对于现有技术，按照本发明提供的方法制备的90Kg级高强度工程机械用钢板具有如下优点：碳当量低，焊接敏感指数低，冶炼成本低且不含B元素；强度余量适中，延伸率、冲击韧性余量大。
具体实施方式
本发明公开了一种90Kg级高强度工程机械用钢板及其制造工艺，本领域技术人员可以借鉴本文内容，适当改进工艺参数实现。特别需要指出的是，所有类似的替换和改动对本领域技术人员来说是显而易见的，它们都被视为包括在本发明。本发明的方法及应用已经通过较佳实施例进行了描述，相关人员明显能在不脱离本发明内容、精神和范围内对本文所述的方法和应用进行改动或适当变更与组合，来实现和应用本发明技术。
本发明提供一种90Kg级高强度工程机械用钢板，其以重量百分比计化学成分含量为：C 0.10-0.16％，Si 0.25-0.50％，Mn 1.4-1.8％，P≤0.018％，S≤0.005％，Alt≥0.020％，Nb 0.030-0.060％，V 0.040-0.080％,Ti 0.008-0.025％，Ni≤0.50，Cr≤0.50％，Mo≤0.40％，RE≤0.0010％，余量为Fe和不可避免的杂质。
相应的，本发明还提供一种上述钢板的制造工艺，其包括将钢坯依次进行加热、轧制和热处理；其中，
加热工序中，加热温度为1200-1250℃，加热时间≥200分钟，均热时间≥30分钟；
轧制工序中，开轧温度为1180-1230℃，精轧温度小于1050℃，终轧温度850-890℃；Acc终冷温度520-620℃；
热处理工艺中：淬火温度为880-950℃，回火温度为470-530℃。
进一步地，所述钢坯的厚度为250mm，最终制得的钢板的厚度为25-30mm。
优选的，轧制工序中：高温延伸阶段单道次压下率为14.9-21.4％；精轧阶段单道次压下率为4.9-24.8％。
相对于现有技术，按照本发明提供的方法制备的90Kg级高强度工程机械用钢板具有如下优点：碳当量低，焊接敏感指数低，冶炼成本低且不含B元素；强度余量适中，延伸率、冲击韧性余量大。
下面结合实施例，进一步阐述本发明：
实施例1
将拟轧制的厚度为250mm的板坯放入加热炉，板坯出炉温度为1250℃，加热时间≥200分钟，均热时间为30分钟，开轧温度为1210℃，板坯的(重量百分比)化学成分为：C0.118％，Si 0.294％，Mn 1.66％，P 0.014％，S 0.005％，Alt 0.026％，Nb 0.045％，V0.068％,Ti 0.014％，Ni0.299％，Cr 0.378％，Mo 0.266％，Ce 0.0001％,余量为Fe和不可避免的杂质。轧制成厚度为25mm的钢板，详细的轧制及热处理工艺见表1，制得钢板的力学性能见表2。
表1轧制及热处理工艺
表2钢板的力学性能
实施例2
将拟轧制的厚度为250mm的板坯放入加热炉，板坯出炉温度为1210℃，加热时间≥200分钟，均热时间为30分钟，开轧温度为1210℃，板坯的(重量百分比)化学成分为：C0.119％，Si 0.298％，Mn 1.67％，P 0.011％，S 0.003％，Alt 0.026％，Nb 0.044％，V0.071％,Ti 0.016％，Ni0.288％，Cr 0.386％，Mo 0.265％，Ce 0.0001％,余量为Fe和不可避免的杂质。轧制成厚度为30mm的钢板，详细的轧制及热处理工艺见表3，制得钢板的力学性能见表4。
表3轧制及热处理工艺
表4钢板的力学性能
由上述内容可知，本发明提供的90Kg级高强度工程机械用钢板的力学性能优异，强度余量适中，延伸率、冲击韧性余量大。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。

Claims (4)

1.一种90Kg级高强度工程机械用钢板，其特征在于，以重量百分比计化学成分含量为：C 0.10-0.16％，Si 0.25-0.50％，Mn 1.4-1.8％，P≤0.018％，S≤0.005％，Alt≥0.020％，Nb 0.030-0.060％，V 0.040-0.080％,Ti 0.008-0.025％，Ni≤0.50，Cr≤0.50％，Mo≤0.40％，RE≤0.0010％，余量为Fe和不可避免的杂质。
2.权利要求1所述的90Kg级高强度工程机械用钢板的制造工艺，其特征在于，包括将钢坯依次进行加热、轧制和热处理；其中，
加热工序中，加热温度为1200-1250℃，加热时间≥200分钟，均热时间≥30分钟；
轧制工序中，开轧温度为1180-1230℃，精轧温度小于1050℃，终轧温度850-890℃；Acc终冷温度520-620℃；
热处理工艺中：淬火温度为880-950℃，回火温度为470-530℃。
3.根据权利要求2所述的制造工艺，其特征在于，所述钢坯的厚度为250mm，最终制得的钢板的厚度为25-30mm。
4.根据权利要求2所述的制造工艺，其特征在于，轧制工序中：高温延伸阶段单道次压下率为14.9-21.4％；精轧阶段单道次压下率为4.9-24.8％。
CN201710301702.7A 2017-05-02 2017-05-02 90kg级高强度工程机械用钢板及其制造工艺 Pending CN107177799A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108165892A (zh) * 2017-11-23 2018-06-15 南阳汉冶特钢有限公司 一种低温压力容器用35-50mm厚Q420R高强钢及其生产方法

Citations (1)

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CN103014542A (zh) * 2012-12-25 2013-04-03 内蒙古包钢钢联股份有限公司 100Kg级无硼高强度工程机械用钢板及其制造方法

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Publication number Priority date Publication date Assignee Title
CN103014542A (zh) * 2012-12-25 2013-04-03 内蒙古包钢钢联股份有限公司 100Kg级无硼高强度工程机械用钢板及其制造方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108165892A (zh) * 2017-11-23 2018-06-15 南阳汉冶特钢有限公司 一种低温压力容器用35-50mm厚Q420R高强钢及其生产方法

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