CN117531828A - 一种超高铬耐热焊接用钢盘条的轧制方法 - Google Patents
一种超高铬耐热焊接用钢盘条的轧制方法 Download PDFInfo
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- 238000005096 rolling process Methods 0.000 title claims abstract description 70
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 60
- 239000010959 steel Substances 0.000 title claims abstract description 60
- 239000011651 chromium Substances 0.000 title claims abstract description 31
- 238000003466 welding Methods 0.000 title claims abstract description 29
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 4
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 4
- 238000004513 sizing Methods 0.000 claims abstract description 4
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 230000007547 defect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000756 V alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- 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
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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
- B21B45/004—Heating the product
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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
- B21B45/02—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
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0224—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for wire, rods, rounds, bars
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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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- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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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
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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Abstract
本发明公开了一种超高铬耐热焊接用钢盘条的轧制方法,该超高铬耐热焊接用钢包括下述质量百分比的各组分:C:0.08%‑0.12%,Si:0.15%‑0.30%,Mn:0.50%‑0.70%,Cr:9.0%‑9.5%,Mo:0.90%‑1.05%,Nb:0.04%‑0.07%,V:0.18%‑0.25%,N:0.04%‑0.07%;该钢盘条经步进式加热炉进行加热,之后送入平立交替无扭轧机进行轧制,轧机装配为:粗轧6道次,中轧6道次,预精轧4道次,精轧机10道次,减定径4道次,轧制成φ5.5mm规格线材。本发明提高生产顺畅性,提高生产效率,降低生产成本。
Description
技术领域
本发明涉及钢铁冶炼领域,尤其涉及一种超高铬耐热焊接用钢盘条的轧制方法。
背景技术
焊丝钢是一种用于焊接金属材料的辅助材料。它由金属丝制成,可以通过电弧、气体等不同的焊接方法将两个或更多金属材料连接在一起。焊丝钢广泛应用于制造、建筑、航空航天、汽车、农业机械等各个领域。在建筑领域,常用于焊接钢结构、管道、压力容器、船舶及桥梁等工程中。在汽车制造中,它常用于焊接车身、底盘及发动机组件。除此之外,焊丝钢还被广泛应用于电子、电器、医疗器械等精密领域。
超高铬耐热焊接用钢的生产难度很高,容易产生产品质量不稳定的问题。因此,需要针对性开发超高铬耐热焊接用钢盘条的轧制方法,以解决上述问题。
发明内容
发明目的:针对现有技术的不足与缺陷,本发明提供一种超高铬耐热焊接用钢盘条的轧制方法,提高生产顺畅性,提高生产效率,降低生产成本。
技术方案:本发明的一种超高铬耐热焊接用钢盘条的轧制方法,其特征在于:该超高铬耐热焊接用钢包括下述质量百分比的各组分:C:0.08%-0.12%,Si:0.15%-0.30%,Mn:0.50%-0.70%,Cr:9.0%-9.5%,Mo:0.90%-1.05%,Nb:0.04%-0.07%,V:0.18%-0.25%,N:0.04%-0.07%;该钢盘条经步进式加热炉进行加热,之后送入平立交替无扭轧机进行轧制,轧机装配为:粗轧6道次,中轧6道次,预精轧4道次,精轧机10道次,减定径4道次,轧制成φ5.5mm规格线材。
其中,所述的钢盘条共经过30道次轧制。
其中,所述的钢盘条的碳当量Ceq=C+Mn/6+(Cr+V+Mo)/5+(Cu+Ni)/15=2.18-2.4。
其中,所述的钢盘条的坯料进行剥皮处理,之后再进行探伤,保证坯料质量。
其中,所述的坯料根据加热炉内静梁的位置和距离,控制钢坯悬空的长度,钢坯长度控制在11.3m-11.8m。
其中,所述的加热炉进行加热的温度为1180℃-1250℃。
其中,所述的钢坯轧制温度控制在1120℃-1160℃。
其中,所述的钢坯轧制后通过除鳞水进行降温,除鳞水压力设定为10MPa。
其中,所述降温时,轧辊冷却喷嘴下方加装隔水装置,防止轧辊冷却水喷到轧件上。
其中,所述的钢盘条轧制的终轧温度设定为900℃-950℃。
有益效果:与现有技术相比,本发明具有以下显著优点:本发明提高生产顺畅性,提高生产效率,降低生产成本。
具体实施方式
下面结合具体实施方式对本发明的技术方案做进一步的描述。
本发明的超高铬耐热焊接用钢盘条的轧制方法,该超高铬耐热焊接用钢包括下述质量百分比的各组分:C:0.08%-0.12%,Si:0.15%-0.30%,Mn:0.50%-0.70%,Cr:9.0%-9.5%,Mo:0.90%-1.05%,Nb:0.04%-0.07%,V:0.18%-0.25%,N:0.04%-0.07%;该钢盘条经步进式加热炉进行加热,之后送入平立交替无扭轧机进行轧制,轧机装配为:粗轧6道次,中轧6道次,预精轧4道次,精轧机10道次,减定径4道次,轧制成φ5.5mm规格线材。钢盘条共经过30道次轧制。
其中,钢盘条的碳当量Ceq=C+Mn/6+(Cr+V+Mo)/5+(Cu+Ni)/15=2.18-2.4。根据化学成份推断出材料的碳当量Ceq=C+Mn/6+(Cr+V+Mo)/5+(Cu+Ni)/15=2.2左右,材料轧制变形抗力大,该钢种Cr含量高达9.0%,是目前高线厂所轧制钢种中Cr含量最高的,还含有较高的Mo、V合金,其强度高、硬度大。
其中,为优化此钢种成品表面质量,钢盘条的坯料进行剥皮处理,之后再进行探伤,保证坯料质量。
其中,根据此钢种特性,需要高温加热以缓解轧制变形时的变形抗力,为防止坯料在炉内高温加热时弯钢,坯料根据加热炉内静梁的位置和距离,控制钢坯悬空的长度,钢坯长度控制在11.3m-11.8m。
其中,为降低轧制时的变形抗力,根据超高铬焊接用钢的特性,制定合理的加热温度,加热炉进行加热的温度为1180℃-1250℃。钢坯轧制温度控制在1120℃-1160℃。
其中,为防止高压除鳞水对坯料温度的影响,钢坯轧制后通过除鳞水进行降温,除鳞水压力设定为10Mpa,降低除鳞水的流量,减少钢坯的温降,使钢坯能够顺利咬入,提高轧制的顺畅性。
其中,为防止轧辊冷却水喷到轧件上造成轧件塑性差,产生轧制缺陷,降温时,轧辊冷却喷嘴下方加装隔水装置,防止轧辊冷却水喷到轧件上。
其中,为防止轧件因温度低、塑性差而造成轧断堆钢,同时便于尺寸精度控制,钢盘条轧制的终轧温度设定为900℃-950℃。
实施例:
以φ5.5mm超高铬耐热焊接用钢P91-SJ生产为例:
此钢种化学成份为(%):C:0.11,Si:0.21,Mn:0.62,Cr:9.1,Mo:0.98,Nb:0.05,V:0.22,N:0.05。
(1)对坯料进行剥皮处理,之后进行探伤,剥皮处理后的坯料无缺陷。
(2)为控制加热炉弯钢,所有坯料长度全部按照11.4m-11.5m进行控制。
(3)加热温度设定1210℃,钢坯轧制温度实际在1140℃-1145℃。
(4)除鳞水压力设定10MPa,实际出水压力10MPa-10.2MPa。
(5)生产前,轧辊冷却喷嘴下方安排加装隔水装置,无轧辊冷却水喷溅到轧件上。
(6)终轧温度按照高温设定,实际轧制温度910℃-930℃,成品尺寸精度达到国标GB/T 14981的B级以上。
按照此控制方法,此批焊接用钢生产顺利,60吨超高铬耐热焊接用钢P91-SJ全部满足客户要求。
Claims (10)
1.一种超高铬耐热焊接用钢盘条的轧制方法,其特征在于:该超高铬耐热焊接用钢包括下述质量百分比的各组分:C:0.08%-0.12%,Si:0.15%-0.30%,Mn:0.50%-0.70%,Cr:9.0%-9.5%,Mo:0.90%-1.05%,Nb:0.04%-0.07%,V:0.18%-0.25%,N:0.04%-0.07%;该钢盘条经步进式加热炉进行加热,之后送入平立交替无扭轧机进行轧制,轧机装配为:粗轧6道次,中轧6道次,预精轧4道次,精轧机10道次,减定径4道次,轧制成φ5.5mm规格线材。
2.根据权利要求1所述的超高铬耐热焊接用钢盘条的轧制方法,其特征在于:所述的钢盘条共经过30道次轧制。
3.根据权利要求1所述的超高铬耐热焊接用钢盘条的轧制方法,其特征在于:所述的钢盘条的碳当量Ceq=C+Mn/6+(Cr+V+Mo)/5+(Cu+Ni)/15=2.18-2.4。
4.根据权利要求1所述的超高铬耐热焊接用钢盘条的轧制方法,其特征在于:所述的钢盘条的坯料进行剥皮处理,之后再进行探伤,保证坯料质量。
5.根据权利要求4所述的超高铬耐热焊接用钢盘条的轧制方法,其特征在于:所述的坯料根据加热炉内静梁的位置和距离,控制钢坯悬空的长度,钢坯长度控制在11.3m-11.8m。
6.根据权利要求5所述的超高铬耐热焊接用钢盘条的轧制方法,其特征在于:所述的加热炉进行加热的温度为1180℃-1250℃。
7.根据权利要求6所述的超高铬耐热焊接用钢盘条的轧制方法,其特征在于:所述的钢坯轧制温度控制在1120℃-1160℃。
8.根据权利要求7所述的超高铬耐热焊接用钢盘条的轧制方法,其特征在于:所述的钢坯轧制后通过除鳞水进行降温,除鳞水压力设定为10MPa。
9.根据权利要求8所述的超高铬耐热焊接用钢盘条的轧制方法,其特征在于:所述的降温时,轧辊冷却喷嘴下方加装隔水装置,防止轧辊冷却水喷到轧件上。
10.根据权利要求9所述的超高铬耐热焊接用钢盘条的轧制方法,其特征在于:所述的钢盘条轧制的终轧温度设定为900℃-950℃。
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