CN115537652A - 大尺寸电视背板热镀锌板材 - Google Patents
大尺寸电视背板热镀锌板材 Download PDFInfo
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- 238000005246 galvanizing Methods 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 48
- 239000010959 steel Substances 0.000 claims abstract description 48
- 238000005096 rolling process Methods 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 11
- 238000005098 hot rolling Methods 0.000 claims abstract description 10
- 230000009467 reduction Effects 0.000 claims abstract description 8
- 238000003723 Smelting Methods 0.000 claims abstract description 7
- 238000000137 annealing Methods 0.000 claims abstract description 7
- 238000009749 continuous casting Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 5
- 239000002253 acid Substances 0.000 claims abstract description 4
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 4
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- 238000005406 washing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 31
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 239000010955 niobium Substances 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 238000005554 pickling Methods 0.000 claims description 9
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000005275 alloying Methods 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 4
- 241000251468 Actinopterygii Species 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
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- 239000003973 paint Substances 0.000 claims 1
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 7
- 239000011701 zinc Substances 0.000 description 7
- 229910052725 zinc Inorganic materials 0.000 description 7
- 229910001566 austenite Inorganic materials 0.000 description 6
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- 238000005192 partition Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
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- 239000011572 manganese Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000010583 slow cooling Methods 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
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- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
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- 238000002791 soaking Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 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
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
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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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
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- 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
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- 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
- C21D8/0273—Final recrystallisation annealing
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- 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
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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Abstract
本发明属于金属板材技术领域，尤其为一种大尺寸电视背板热镀锌板材，按重量百分比计，由以下成分组成：C 0.1‑0.2％，Si 1.5‑2.5％，Mn 2.5‑3.5％，P≤0.025％，S≤0.025％，Nb 0.05‑0.08％，Mo 0.5‑1.5％；Al＜0.6％，其余为Fe；所述板材的生产方法，依次包括如下步骤：冶炼、连铸、热轧、酸洗、冷连轧、连续退火、热镀锌。本发明通过减薄零件厚度，有效实现材料减少，使用淬火配分钢可减薄28％，但强度却提升2倍左右。
Description
技术领域
本发明属于金属板材技术领域，具体涉及一种大尺寸电视背板热镀锌板材。
背景技术
热镀锌钢板，是将薄钢板浸入熔解的锌槽中，使其表面粘附一层锌的薄钢板，热镀锌板主要用于建筑、家电、电子产品、机械、轻工等行业，热镀锌钢板有着极为优秀的耐蚀性、上漆性、成形性及点焊性，用途极为广泛，现有的电视背板大多采用该板材，但是随着电视尺寸越做越大，越做越薄，热镀锌板材也要做到大尺寸和极薄，于是存在板材强度降低的问题。
发明内容
为解决上述背景技术中提出的问题，本发明提供了一种强度高的大尺寸电视背板热镀锌板材。
为实现上述目的，本发明提供如下技术方案：一种大尺寸电视背板热镀锌板材，按重量百分比计，由以下成分组成：C 0.1-0.2％，Si 1.5-2.5％，Mn2.5-3.5％，P≤0.025％，S≤0.025％，Nb 0.05-0.08％，Mo 0.5-1.5％；Al＜0.6％，其余为Fe；
所述板材的生产方法，依次包括如下步骤：冶炼、连铸、热轧、酸洗、冷连轧、连续退火、热镀锌。
进一步的，冶炼过程中钢包Alt按0.005-0.020％控制；钢包N≤40ppm；脱S结束后进行铌合金化，采用硅钙线钙处理，铁加入后软吹氩15-20min；严格避免钢液裸露；合金化顺序为Si-Mn-Mo-Nb，Al随造渣过程加入。
进一步的，连铸工艺采用独立浇次，全程进行保护浇注，开浇前采用氩气吹扫中包，浇注过程无钢液裸露；采用高碱度中包渣；浇钢过程投入软压下功能；浇钢过程保持恒拉速；中包过热度按15-25℃控制。
进一步的，热轧工序中，钢坯经过蓄热式加热炉加热至1250-1300℃，在炉时间为3-4h，出炉温度为1200-1250℃；粗轧机组开轧温度1140-1180℃；精轧入口温度≥980℃，精轧出口温度为870-900℃；根据带钢表面的实际情况，投入精轧机组中的前两个精轧机F1、F2机后除鳞装置，除去鱼鳞状的氧化铁皮；层流冷却采用三段式冷却，带钢出精轧机组后开启第一组层流水冷却，冷却到700-720℃后，进行空冷10-15s，之后开启第二段层流冷却水冷却至550-580℃进行卷取，层流冷却属于热轧工序，目的是使精轧出口的带钢温度降低到卷取目标温度，也就是从870-900℃降低到550-580℃。
进一步的，酸洗工艺中酸洗温度为75-85℃，酸洗速度100-130m/min。
与现有技术相比，本发明的有益效果是：通过减薄零件厚度，有效实现材料减少，使用淬火配分钢可减薄28％，但强度却提升2倍左右。
具体实施方式
下面将结合本发明实施例，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
一种大尺寸电视背板热镀锌板材，按重量百分比计，由以下成分组成：C0.1-0.2％，Si 1.5-2.5％，Mn 2.5-3.5％，P≤0.025％，S≤0.025％，Nb 0.05-0.08％，Mo 0.5-1.5％；Al＜0.6％，其余为Fe。
所述板材的屈服强度600-800MPa，抗拉强度≥1000MPa，延伸率18-23％。
一种大尺寸电视背板热镀锌板材的生产方法，依次包括如下步骤：冶炼、连铸、热轧、酸洗、冷连轧、连续退火、热镀锌。
冶炼过程中钢包Alt按0.005-0.020％控制；钢包N≤40ppm；脱S结束后进行铌合金化，采用硅钙线钙处理，铁加入后软吹氩15-20min；严格避免钢液裸露；合金化顺序为Si-Mn-Mo-Nb，Al随造渣过程加入。
连铸工艺采用独立浇次，全程进行保护浇注，开浇前采用氩气吹扫中包，浇注过程无钢液裸露；采用高碱度中包渣；浇钢过程投入软压下功能；浇钢过程保持恒拉速；中包过热度按15-25℃控制。
热轧工序中，钢坯经过蓄热式加热炉加热至1250-1300℃，在炉时间为3-4h，出炉温度为1200-1250℃；粗轧机组开轧温度1140-1180℃；精轧入口温度≥980℃，精轧出口温度为870-900℃；根据带钢表面的实际情况，投入精轧机组中的前两个精轧机F1、F2机后除鳞装置，除去鱼鳞状的氧化铁皮；层流冷却采用三段式冷却，带钢出精轧机组后开启第一组层流水冷却，冷却到700-720℃后，进行空冷10-15s，之后开启第二段层流冷却水冷却至550-580℃进行卷取。层流冷却属于热轧工序，目的是使精轧出口的带钢温度降低到卷取目标温度，也就是从870-900℃降低到550-580℃。
酸洗工艺中酸洗温度为75-85℃，酸洗速度100-130m/min。
冷连轧压下率控制在≥55％。
连续退火的工艺参数如下：加热段：820±10℃；均热段：820±10℃；缓冷段：710±10℃；快冷段：330±10℃；均衡段：330±10℃；感应加热器/锌锅：460±5℃；工艺速度：85±5m/min。快冷段控制高氢气氛，氢气含量≥20％，均衡段开启边部保温功能，保证带钢横向温度差异小于2℃，实现碳在均衡段的均匀稳定配分。连续热镀锌机组的炉体部分包括加热段、保温段、缓冷段、快冷段及均衡段。快冷段、均衡段属于连续热镀锌机组工艺段，结合工艺速度以实现在不同工艺段，不同时间及温度的控制。热镀锌工艺中，感应加热器出口温度设定为与锌锅温度一致。
热镀锌工序，带钢在两相区退火后经缓冷及快冷最终淬火至300-350℃，然后在热镀锌机组的均衡段进行一步配分处理，配分时间为20-40s，此过程中完成碳向未转变奥氏体的富集，之后利用进入锌锅之前的感应加热器超快速加热至455-465℃进入锌锅完成热镀锌。
本发明优点如下：
1、高强度热镀锌淬火配分钢，化学成分的合理及精确的设计及窄成分的合理控制、成分的稳定性，有利于最终钢及组织性能的稳定控制。低碳设计提高焊接性能；高锰设计在增加淬透性提高强度的同时有效提高残余奥氏体的稳定性，使最终的强度及塑性得到改善；添加铌元素，细化原始奥氏体晶粒，使得在退火过程中碳从马氏体向奥氏体配分的有效距离缩短，提高碳配分效率；添加钼有效改善马氏体形态，增加其变形协调能力，有利于延性的提高。
2、两相区退火引入提高延性的铁素体；
3、利用均衡段实现一步淬火配分工艺，原始奥氏体的细化有利于碳配分效率的提高；
4、通过感应加热器超快速升温至锌锅温度完成镀锌，最终实现多相组织，有利于协调变形，在获得高强度的同时兼具良好的延伸率。
5、通过采用以上工艺，通过一步配分工艺即可完成及高延伸率的热镀锌淬火配分钢生产；细小的组织有利于碳配分效率的提高，且均衡段处理时间较长，可以实现碳的完全配分，避免采用锌锅配分方式因为配分时间极短，存在工艺速度波动而造成的配分时间少且波动大的问题，影响最终产品的残余奥氏体含量，导致延伸率偏低。
本发明通过减薄零件厚度，有效实现材料减少，使用淬火配分钢可减薄28％，但强度却提升2倍左右。
最后应说明的是：以上所述仅为本发明的优选实施例而已，并不用于限制本发明，尽管参照前述实施例对本发明进行了详细的说明，对于本领域的技术人员来说，其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
Claims (5)
1.大尺寸电视背板热镀锌板材，其特征在于：按重量百分比计，由以下成分组成：C0.1-0.2％，Si 1.5-2.5％，Mn 2.5-3.5％，P≤0.025％，S≤0.025％，Nb 0.05-0.08％，Mo0.5-1.5％；Al＜0.6％，其余为Fe；
所述板材的生产方法，依次包括如下步骤：冶炼、连铸、热轧、酸洗、冷连轧、连续退火、热镀锌。
2.根据权利要求1所述的大尺寸电视背板热镀锌板材的生产工艺，其特征在于：冶炼过程中钢包Alt按0.005-0.020％控制；钢包N≤40ppm；脱S结束后进行铌合金化，采用硅钙线钙处理，铁加入后软吹氩15-20min；严格避免钢液裸露；合金化顺序为Si-Mn-Mo-Nb，Al随造渣过程加入。
3.根据权利要求2所述的大尺寸电视背板热镀锌板材的生产工艺，其特征在于：连铸工艺采用独立浇次，全程进行保护浇注，开浇前采用氩气吹扫中包，浇注过程无钢液裸露；采用高碱度中包渣；浇钢过程投入软压下功能；浇钢过程保持恒拉速；中包过热度按15-25℃控制。
4.根据权利要求3所述的大尺寸电视背板热镀锌板材的生产工艺，其特征在于：热轧工序中，钢坯经过蓄热式加热炉加热至1250-1300℃，在炉时间为3-4h，出炉温度为1200-1250℃；粗轧机组开轧温度1140-1180℃；精轧入口温度≥980℃，精轧出口温度为870-900℃；根据带钢表面的实际情况，投入精轧机组中的前两个精轧机F1、F2机后除鳞装置，除去鱼鳞状的氧化铁皮；层流冷却采用三段式冷却，带钢出精轧机组后开启第一组层流水冷却，冷却到700-720℃后，进行空冷10-15s，之后开启第二段层流冷却水冷却至550-580℃进行卷取，层流冷却属于热轧工序，目的是使精轧出口的带钢温度降低到卷取目标温度，也就是从870-900℃降低到550-580℃。
5.根据权利要求4所述的大尺寸电视背板热镀锌板材的生产工艺，其特征在于：酸洗工艺中酸洗温度为75-85℃，酸洗速度100-130m/min。
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