CN114657349A - 一种适用于冷加工的风电非调质钢棒材的制备方法 - Google Patents

一种适用于冷加工的风电非调质钢棒材的制备方法 Download PDF

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CN114657349A
CN114657349A CN202210180034.8A CN202210180034A CN114657349A CN 114657349 A CN114657349 A CN 114657349A CN 202210180034 A CN202210180034 A CN 202210180034A CN 114657349 A CN114657349 A CN 114657349A
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temperature
quenched
steel bar
tempered steel
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王莹
周蕾
邓伟
李磊
彭学艺
江雁
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Nanjing Iron and Steel Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically
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    • 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
    • C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0075—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rods of limited length
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • C22C33/06—Making ferrous alloys by melting using master alloys
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    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • 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
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    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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    • 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
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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
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Abstract

本发明公开了一种适用于冷加工的风电非调质钢棒材的制备方法，包括轧制加热、轧制除磷、控温轧制、控温冷却以及超声波、漏磁探伤等工序，并在组分中通过对C的组分含量进行调整，来满足棒材对低温韧性、强韧性的需求，并通过加入Cr、Mo等合金以及钒氮、氮化铝细化晶粒来确保其本身强度，同时通过低温终轧、轧后穿水的方式来提高强度，通过本方法制备得到的棒材强度高，可以满足风电行业客户对低温韧性的需求，在加工为风电机组零件后，各项性能良好。

Description

一种适用于冷加工的风电非调质钢棒材的制备方法
技术领域
本发明涉及冶金领域，具体涉及一种适用于冷加工的风电非调质钢棒材的制备方法。
背景技术
目前风电机组的零件多采用调质钢，其在制备过程中发生热处理后变形、开裂的频次较高，严重影响了风塔的建设。且调质热处理的成本比较高。常规非调质钢仅仅对常温冲击功进行了要求，未涉及到零下30℃下圆钢的低温冲击功性能。
公开号为CN104651753A的专利《一种重型汽车平衡轴用非调质钢及其制造方法》中，其组分包含了Mn：1.50～2.30％，且20℃常温纵向冲击≥50J，仍旧未对-30℃低温冲击功进行控制。
公开号为CN109234627A的专利《一种高强高韧性非调质圆钢及制备方法》中，组分包含了C：0.27～0.33％，未对Ni元素做要求，其常温纵向冲击≥190J，依旧未对-30℃的低温冲击功进行控制。
发明内容
发明目的：本发明的目的是提供一种能够符合条件恶劣环境下风电机组零件用的适用于冷加工的风电非调质钢棒材的制备方法。
技术方案：本发明所述的适用于冷加工的风电非调质钢棒材的制备方法，，该非调质钢棒材的组分按重量百分比计包括C：0.15～0.25％、Mn：1.20～1.50％、Si：0.20～0.50％、P≤0.035％、S：0.020～0.060％、Cr：≤0.35％、Ni：0.08～0.35％、Al：0.010～0.040％、Mo：≤0.10％，V：0.06～0.20％、N：0.005～0.020％，其余为Fe和不可避免的杂质。
在上述技术方案中，通过对C的组分含量进行调整，来满足棒材对低温韧性、强韧性的需求，并通过加入Cr、Mo等合金以及钒氮、氮化铝细化晶粒来确保其本身强度。
优选的，该方法包括以下步骤：
(1)轧制加热：加热温度为950～1200℃，总加热时间≥200min；
(2)轧制除磷：采用高压水除磷，压力≥13MPa；
(3)控温轧制：开轧温度≥960℃；
(4)控温冷却：轧制后穿水快速冷却，上冷床温度＜780℃，上冷床均匀冷却，下冷床堆冷温度＜450℃。
在该方法中，通过低温终轧、轧后穿水的方式来提高强度。
优选的，最后采用超声波探伤和漏磁探伤的方式对冷却后的棒材进行检测。
优选的，在步骤(3)中，采用KOCKS轧机将终轧温度控制在880℃以下，实现连续控温轧制。
优选的，过该方法制备得到的棒材，抗拉强度Rm650～850MPa，屈服强度Rp0.2≥500MPa，延伸率A％≥15％，低温冲击功KV2(-30℃)≥80J，硬度200～260HBW。
有益效果：本发明与现有技术相比，其具有的优点：通过本方法制备得到的棒材强度高，可以满足风电行业客户对低温韧性的需求，在加工为风电机组零件后，各项性能良好。
附图说明
图1为本实施例制备得到的棒材表面金相组织图(*200)；
图2为棒材1/2R处金相组织图(*200)；
图3为棒材心部金相组织图(*200)；
图4为棒材奥氏体晶粒度示意图(*200)。
具体实施方式
下面结合附图对本发明的技术方案作进一步说明。
实施例：该实施例为规格为φ20～80mm的风电用非调质钢棒材具体成分，见下表：
C Si Mn P S Cr Al Mo V N
0.21 0.40 1.40 0.011 0.032 0.15 0.020 0.03 0.10 0.0010
采用该方法步骤进行制备：
(1)在950～1200℃下进行加热轧制，总加热时间≥200min；
(2)采用高压水除磷，压力≥13MPa；
(3)轧制开轧温度≥960℃，采用KOCKS轧机将终轧温度控制在880℃以下，实现连续控温轧制；
(4)轧制后穿水快速冷却，上冷床温度＜780℃，上冷床均匀冷却，下冷床＜450℃堆冷；
(5)采用超声波探伤、漏磁探伤的方式进行检测，超声波探伤精度满足GB/T 4162的A级要求，表面缺陷深度≤0.30mm。
选取根据上述实施例制备得到的棒材进行检测，检测结果如下：抗拉强度Rm：750MPa，屈服强度Rp0.2:600MPa，延伸率A％：20％，低温冲击功KV2(-30℃)：96J，硬度228HBW，表面组织为细小的回火索氏体组织，二分之一半径及心部组织为铁素体+珠光体，见图1～3。奥氏体晶粒度7.0级，见图4。

Claims (6)

1.一种适用于冷加工的风电非调质钢棒材的制备方法，其特征在于，该非调质钢棒材的组分按重量百分比计包括C：0.15～0.25％、Mn：1.20～1.50％、Si：0.20～0.50％、P≤0.035％、S：0.020～0.060％、Cr：≤0.35％、Ni：0.08～0.35％、Al：0.010～0.040％、Mo：≤0.10％，V：0.06～0.20％、N：0.005～0.020％，其余为Fe和不可避免的杂质。
2.根据权利要求1所述的适用于冷加工的风电非调质钢棒材的制备方法，其特征在于，该方法包括以下步骤：
(1)轧制加热：加热温度为950～1200℃，总加热时间≥200min；
(2)轧制除磷：采用高压水除磷，压力≥13MPa；
(3)控温轧制：开轧温度≥960℃；
(4)控温冷却：轧制后穿水快速冷却，上冷床温度＜780℃，上冷床均匀冷却，下冷床堆冷温度＜450℃。
3.根据权利要求2所述的适用于冷加工的风电非调质钢棒材的制备方法，其特征在于，最后采用超声波探伤和漏磁探伤的方式对冷却后的棒材进行检测。
4.根据权利要求3所述的适用于冷加工的风电非调质钢棒材的制备方法，其特征在于，超声波探伤精度满足GB/T 4162的A级要求，表面缺陷深度≤0.30mm。
5.根据权利要求2所述的适用于冷加工的风电非调质钢棒材的制备方法，其特征在于，在步骤(3)中，采用KOCKS轧机将终轧温度控制在880℃以下，实现连续控温轧制。
6.根据权利要求2所述的适用于冷加工的风电非调质钢棒材的制备方法，其特征在于，通过该方法制备得到的棒材，抗拉强度Rm650～850MPa，屈服强度Rp0.2≥500MPa，延伸率A％≥15％，低温冲击功KV2(-30℃)≥80J，硬度200～260HBW。
CN202210180034.8A 2022-02-25 2022-02-25 一种适用于冷加工的风电非调质钢棒材的制备方法 Pending CN114657349A (zh)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011246784A (ja) * 2010-05-28 2011-12-08 Jfe Steel Corp 強度および靭性に優れた圧延非調質棒鋼ならびにその製造方法
CN114058944A (zh) * 2021-09-17 2022-02-18 大冶特殊钢有限公司 一种q500钢级低合金结构钢棒材及其控轧控冷轧制方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011246784A (ja) * 2010-05-28 2011-12-08 Jfe Steel Corp 強度および靭性に優れた圧延非調質棒鋼ならびにその製造方法
CN114058944A (zh) * 2021-09-17 2022-02-18 大冶特殊钢有限公司 一种q500钢级低合金结构钢棒材及其控轧控冷轧制方法

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