CN116197238A - 一种易切削钢头部开裂生产控制方法 - Google Patents
一种易切削钢头部开裂生产控制方法 Download PDFInfo
- Publication number
- CN116197238A CN116197238A CN202310174971.7A CN202310174971A CN116197238A CN 116197238 A CN116197238 A CN 116197238A CN 202310174971 A CN202310174971 A CN 202310174971A CN 116197238 A CN116197238 A CN 116197238A
- Authority
- CN
- China
- Prior art keywords
- blank
- head
- free
- sulfur content
- cutting steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/18—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
-
- 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
- B21B45/004—Heating the product
-
- 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
- B21B45/02—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 lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0206—Coolants
-
- 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
- B21B45/06—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 of strip material
-
- 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
-
- 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
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- 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
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
本发明公开了一种易切削钢头部开裂生产控制方法,包括电炉初炼‑LF精炼‑方坯连铸‑坯料加热‑表面除磷‑轧制‑分段‑打包,控制坯料成分中硫含量为0.34%‑0.42%,(1)当坯料成分中硫含量为0.34%‑0.37%时,依流程完成生产;(2)当坯料成分中硫含量为0.38%‑0.42%时,a.控制加热炉内均热段温度1220℃‑1230℃;b.水除鳞后,进入轧机前,手动打开冷却水对轧辊进行冷却,冷却后关闭冷却水;c.中间坯头部出初轧最后一架轧机时,对初轧末机架进行提速,在进入中轧轧机前,所有保温辊道关闭,沿线所有喷嘴关闭;d.生产过程中,中间坯头部有开裂倾向时,采用气焊手动加热;该方法简单易行,合理控制硫含量,根据硫含量配合提高均热温度降低坯料头部硫含量的偏聚,合理控制冷却水减少中间坯头部温度损失,避免头部开裂。
Description
技术领域
本发明涉及一种切削钢的生产方法,具体涉及一种易切削钢头部开裂生产控制方法,属于钢铁加工技术领域。
背景技术
易切削钢通常在钢中加入一定量的易切削元素硫,使得其具有良好的被切削加工性能。但是在浇铸时,硫元素易受拉坯速度和浇筑温度的影响发生偏析,而且硫元素的加入在提高加工性能的同时也使得含硫钢在轧制时发生热脆而坯料头部开裂,中间坯在轧制过程中头部降温较快也易于开裂,使得轧机咬入困难,而且坯料开裂随着轧制塑性变形越来越大,易于冲击轧机出口,对生产和设备运行产生很大影响,处理故障费时费力,给轧钢厂带来较大的经济损失。
专利CN115198201A防止易切削钢盘条打滑及开裂的生产方法,通过设计钢坯锰硫比、加热温度、除鳞水压力、开轧速度和粗轧减面率等工艺参数,合理控制钢坯在轧制过程中的温度范围和外形尺寸,保证钢坯稳定通过轧机,降低了易切削钢轧制过程中经常遇到的打滑和开裂现象,提高盘条性能稳定性,并且减少冲钢风险,保证设备和人员的安全。通过该方法,易切削钢轧制过程中的打滑和开裂分别降低至1 .2‰和1 .0‰以下,成材率提高到95%以上;但是这种方法一般是针对钢盘条或者钢片,且工艺复杂,成本高,复杂的工艺易出故障,使用不变,生产节奏慢。
发明内容
本发明所要解决的技术问题是,克服现有技术的缺点,提供一种易切削钢头部开裂生产控制方法,该方法简单易行,合理控制硫含量,根据硫含量配合提高均热温度和控制沿线冷却水,减少中间坯头部温度损失,避免头部开裂。
本发明解决以上技术问题的技术方案是:
一种易切削钢头部开裂生产控制方法,工艺流程包括电炉初炼-LF精炼-方坯连铸-坯料加热-表面除磷-轧制-分段-打包,初炼时按质量比计控制坯料成分中硫含量为0.34%-0.42%,包括:
(1)对坯料检测,当初炼时坯料成分中硫含量为0.34%-0.37%时,依流程完成易切削钢的生产;
(2)对坯料检测,当初炼时坯料成分中硫含量为0.38%-0.42%时,对坯料加热、表面除磷、轧制进行控制,具体为:
a. 初炼时坯料成分中硫含量为0.38%-0.42%时,坯料在加热炉内均热段温度为1220℃-1230℃;
b. 坯料水除鳞后,采用手动冷却模式,进入轧机前,手动打开冷却水对轧辊进行冷却,保证轧辊冷却的情况下,手动关闭冷却水;
c. 中间坯头部出初轧最后一架轧机时,对初轧末机架进行提速,在进入中轧轧机前,所有保温辊道关闭,沿线所有喷嘴关闭;
d. 生产过程中,中间坯头部有开裂倾向时,采用气焊手动加热,来快速提高中间坯头部温度。
本发明进一步限定的技术方案是:
进一步的,前述易切削钢头部开裂生产控制方法中,步骤c中对初轧末机架进行提速,控制速度为0.6m/s。
前述易切削钢头部开裂生产控制方法中,步骤b中采用冷却水对轧辊冷却时冷却水水压在0.55-0.60Mpa。
技术效果,轧辊冷却水水压在0.55-0.60MPa,轧辊的快速冷却可以增加坯料头部与轧辊的摩擦力,便于坯料顺利咬入,减少坯料头部因咬入打顿而温度降低,增加坯料开花头的风险。
前述易切削钢头部开裂生产控制方法中,步骤d中中间坯头部有黑色形成时代表有开裂,采用气焊手动加热。
前述易切削钢头部开裂生产控制方法中,采用气焊手动加热,提高中间坯头部温度到940-960℃。
前述易切削钢头部开裂生产控制方法中,易切削钢按质量百分比计包括以下组分:C:0.05-0.07%,Si≤0.05%,Mn1.25-1.45%,S:0.34-0.42%,P:0.04-0.09,Fe余量,以上各组分之和为100%。
本发明的有益效果是:
本发明步骤(2)在坯料加热时将坯料在加热炉内均热段温度由现有技术中一般1050-1220℃提升为1220℃-1230℃,提高坯料头部温度,使S元素在坯料内均匀分布,降低轧制时因硫元素偏聚造成头部开裂风险。
目前在生产时,有易切削钢生产模式,钢快进入轧机时会自动关闭水,进入轧机时自动开水,自动模式对轧辊冷却不充分,步骤b中采用手动冷却的方式,保证冷却充分,冷却水可以避免水带走温度,减少坯料头部温度损失,轧辊温度低,也增大轧辊与坯料的摩擦,便于咬入,不打滑,使得坯料在塑性变形后不会出现开裂现象。
步骤c中对初轧末机架进行提速,快速的运行,减少头部温度流失,在进入中轧轧机前,所有保温辊道关闭,沿线所有喷嘴关闭减少中间坯头部温度损失,降低开裂。
步骤d中间坯头部有开裂倾向时,有黑色时采用气焊手动加热,可以有效避免中间坯头部因温塑性变形而加大开裂,保证生产正常运行。
目前钢厂生产的硫含量都是低硫的,但是市场需求高硫的订单也比较多,1215MS易切削钢含硫量高,生产过程的控制,易切削钢生产过程中,因加入硫,轧制时容易打滑跑钢,坯料头部开裂造成轧机设备故障,本发明通过控制坯料中的硫含量在0.34%-0.37%之间,中间坯料头部不开裂,大于0.37%时,轧制过程中通过控制坯料中硫含量及中间坯头部温度损失,可以有效避免1215MS易切削钢中间坯头部开裂现象,减少设备损坏和提高生产运行效率。
实施方式
实施例
本实施例提供的一种易切削钢头部开裂生产控制方法,工艺流程包括电炉初炼-LF精炼-方坯连铸-坯料加热-表面除磷-轧制-分段-打包,初炼时易切削钢按质量百分比计包括以下组分:C:0.05-0.07%,Si≤0.05%,Mn1.25-1.45%,S:0.34-0.42%,P:0.04-0.09,Fe余量,以上各组分之和为100%,控制坯料成分中硫含量为0.34%-0.42%,包括:
(1)对坯料检测,当初炼时坯料成分中硫含量为0.34%-0.37%时,依现有技术中的流程完成易切削钢的生产;
(2)对坯料检测,当初炼时坯料成分中硫含量为0.38%-0.42%时,对坯料加热、表面除磷、轧制进行控制,具体为:
a. 初炼时坯料成分中硫含量为0.38%-0.42%时,坯料在加热炉内均热段温度为1220℃-1230℃;
b. 坯料水除鳞后,采用手动冷却模式,进入轧机前,手动打开冷却水对轧辊进行冷却,保证轧辊冷却的情况下,手动关闭冷却水;
采用冷却水对轧辊冷却时冷却水水压在0.55-0.60Mpa;
c. 中间坯头部出初轧最后一架轧机时,对初轧末机架进行提速,速度为0.6m/s,在进入中轧轧机前,所有保温辊道关闭,沿线所有喷嘴关闭;
d. 生产过程中,中间坯头部有开裂倾向时,有黑色形成,采用气焊手动加热,来快速提高中间坯头部温度到940-960℃,直至黑色消失。
本方法用于1215MS易切削钢,1215MS易切削钢是一种高含硫钢,大批量生产时发现硫含量在0.34-0.37%时,生产过程中坯料头部未开裂,当硫含量大于0.37%时,通过检查飞因此,本发明在轧制过程中通过控制坯料中硫含量及中间坯头部温度损失,可以有效避免1215MS易切削钢中间坯头部开裂现象,减少设备损坏和提高生产运行效率。
除上述实施例外,本发明还可以有其他实施方式。凡采用等同替换或等效变换形成的技术方案,均落在本发明要求的保护范围。
Claims (6)
1.一种易切削钢头部开裂生产控制方法,工艺流程包括电炉初炼-LF精炼-方坯连铸-坯料加热-表面除磷-轧制-分段-打包,其特征在于:初炼时按质量比计控制坯料成分中硫含量为0.34%-0.42%,包括:
(1)对坯料检测,当初炼时坯料成分中硫含量为0.34%-0.37%时,依流程完成易切削钢的生产;
(2)对坯料检测,当初炼时坯料成分中硫含量为0.38%-0.42%时,对坯料加热、表面除磷、轧制进行控制,具体为:
a. 初炼时坯料成分中硫含量为0.38%-0.42%时,坯料在加热炉内均热段温度为1220℃-1230℃;
b. 坯料水除鳞后,采用手动冷却模式,进入轧机前,手动打开冷却水对轧辊进行冷却,保证轧辊冷却的情况下,手动关闭冷却水;
c. 中间坯头部出初轧最后一架轧机时,对初轧末机架进行提速,在进入中轧轧机前,所有保温辊道关闭,沿线所有喷嘴关闭;
d. 生产过程中,中间坯头部有开裂倾向时,采用气焊手动加热,来快速提高中间坯头部温度。
2.根据权利要求1所述的易切削钢头部开裂生产控制方法,其特征在于:所述步骤b中采用冷却水对轧辊冷却时冷却水水压在0.55-0.60Mpa。
3.根据权利要求1所述的易切削钢头部开裂生产控制方法,其特征在于:所述步骤c中对初轧末机架进行提速,控制速度为0.6m/s。
4.根据权利要求1所述的易切削钢头部开裂生产控制方法,其特征在于:所述步骤d中中间坯头部有黑色形成时代表有开裂,采用气焊手动加热。
5.根据权利要求1所述的易切削钢头部开裂生产控制方法,其特征在于:采用气焊手动加热,提高中间坯头部温度到940-960℃。
6.根据权利要求1所述的易切削钢头部开裂生产控制方法,其特征在于:易切削钢按质量百分比计包括以下组分:C:0.05-0.07%,Si≤0.05%,Mn1.25-1.45%,S:0.34-0.42%,P:0.04-0.09,Fe余量,以上各组分之和为100%。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202310174971.7A CN116197238A (zh) | 2023-02-28 | 2023-02-28 | 一种易切削钢头部开裂生产控制方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202310174971.7A CN116197238A (zh) | 2023-02-28 | 2023-02-28 | 一种易切削钢头部开裂生产控制方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN116197238A true CN116197238A (zh) | 2023-06-02 |
Family
ID=86518868
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202310174971.7A Pending CN116197238A (zh) | 2023-02-28 | 2023-02-28 | 一种易切削钢头部开裂生产控制方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN116197238A (zh) |
-
2023
- 2023-02-28 CN CN202310174971.7A patent/CN116197238A/zh active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN111424210B (zh) | 焊丝用热轧盘条及其生产方法 | |
CN102628148B (zh) | 酸洗后表面无线状缺陷的热轧低碳钢及其制造方法 | |
WO2015043061A1 (zh) | 一种非调质钢及其生产工艺 | |
CN103586433A (zh) | 一种提高连铸板坯头和尾坯探伤合格率的方法 | |
CN101538684A (zh) | 铁路车辆制动系统用不锈钢管及其制造方法 | |
CN101607266A (zh) | 一种适用于炉卷轧机生产铁素体不锈钢热轧钢带的方法 | |
WO2015043059A1 (zh) | 一种非调质钢及其生产工艺 | |
CN103667924A (zh) | 一种40Cr热轧盘条的生产方法 | |
CN107312975A (zh) | 一种高碳高铬钢及其板坯生产方法 | |
CN105499300A (zh) | 一种用于锁具的铜带生产工艺 | |
CN106591742A (zh) | 高碳含硫铁素体易切削不锈钢及其生产方法 | |
CN101748264B (zh) | 一种耐候钢板坯的加热方法 | |
CN107012371A (zh) | 一种建筑装饰用铝带的制备方法 | |
CN109112468B (zh) | 氧化膜、耐腐蚀钢轨及该钢轨的制备方法 | |
CN116197238A (zh) | 一种易切削钢头部开裂生产控制方法 | |
CN107245657A (zh) | 一种超高强电梯钢丝绳用钢及生产方法 | |
CN106493169A (zh) | 一种轧钢的生产工艺 | |
CN113680814A (zh) | 一种中碳低合金线材表面氧化铁皮控制方法 | |
CN108486340A (zh) | 高碳高铬的不锈钢及其加工方法 | |
CN109093087B (zh) | 一种铸坯角部加热方法 | |
CN111760914B (zh) | 一种短流程中停留时间大于60min在炉铸坯氧化铁皮的控制方法 | |
CN111069553B (zh) | 一种连铸坯的质量改进方法 | |
CN113549744A (zh) | 一种高硅铝成分钢板生产方法 | |
JPH0218936B2 (zh) | ||
CN115198201B (zh) | 防止易切削钢盘条打滑及开裂的生产方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination |