CN114737132A - 一种n06600铁镍基合金热连轧板卷生产工艺 - Google Patents

一种n06600铁镍基合金热连轧板卷生产工艺 Download PDF

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CN114737132A
CN114737132A CN202210433407.8A CN202210433407A CN114737132A CN 114737132 A CN114737132 A CN 114737132A CN 202210433407 A CN202210433407 A CN 202210433407A CN 114737132 A CN114737132 A CN 114737132A
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周嘉晟
冯旺爵
肖亮明
丁疆
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Shandong Shengyang Metal Technology Co Ltd
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    • C22C38/00Ferrous alloys, e.g. steel alloys
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    • B21B1/26Metal-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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
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    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B3/00Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B3/02Rolling special iron alloys, e.g. stainless steel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
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    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04Devices 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
    • B21B45/06Devices 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
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
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    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
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    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226Hot rolling
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    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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    • C22C38/001Ferrous alloys, e.g. steel alloys containing N
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    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
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    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
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    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium
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    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
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    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
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Abstract

本发明公开了一种N06600铁镍基合金热连轧板卷生产工艺,步骤如下:1)准备钢坯转运至加热炉进行加热,板坯厚度为220‑240mm;2)粗轧:加热后的板坯经过传输辊传送至粗轧机;3)精轧:经过传输进入精轧机构;4)卷取:精轧后送入卷取机构进行卷取;5)开卷及焊接;6)退火:通过退火机构对合金板进行退火处理,然后进行冷却;7)破磷抛丸;通过抛丸机对退火后的合金板进行抛丸处理;8)酸洗;9)清洗及烘干。本发明能够提高成材率和生产效率,减低能耗。

Description

一种N06600铁镍基合金热连轧板卷生产工艺
技术领域
本发明属于铁镍基合金生产技术领域,特别涉及一种N06600铁镍基合金热连轧板卷生产工艺。
背景技术
N06600合金名义化学成分为1Cr15Ni75Fe8,是一种耐高温耐蚀合金。该合金对酸、碱溶液耐腐蚀性能强,特别是在氯离子溶液中有着比其他金属更强的抗应力腐蚀性,广泛应用于造船、压力容器、石油化工、热交换器等行业;现有的N06600带卷的生产方式能耗较高,生产效率较低,热轧卷板极易出现边裂,成材率以及尺寸精度较低;现有的酸洗工艺中在N06600带卷的酸洗过程中往往使用硫酸加入到酸洗工艺中去,但是硫酸不易挥发,会对原有溶液PH产生影响,同时易产生后续污染等,所以需要一种本发明采用热连轧的生产方式以提高成材率和生产效率,减低能耗。
发明内容
本发明的目的是克服现有技术中不足,提供一种N06600铁镍基合金热连轧板卷生产工艺,能够提高成材率和生产效率,减低能耗。
为了实现上述目的,本发明采用的技术方案是:
一种N06600铁镍基合金热连轧板卷生产工艺,步骤如下:
1)准备上述组分原料至加热炉进行加热,板坯厚度为220-240mm,其加热步骤依分为预热段、加热一段、加热二段、均热段;预热段,温度控制在700-750℃,加热时间设为60-65min;预热段完成后进入加热一段加热,温度控制在1020-1060℃,加热时间设为45-50min;加热一段完成后进入加热二段加热,温度控制在1150-1180℃,加热时间设为50-60min;加热二段完成后进入均热段,温度控制在1160-1175℃,加热时间设为35-40min;高温段包括加热二段和均热段,高温段时间≤95min,总在炉时间为190-210min。
2)粗轧:加热后的板坯经过传输辊传送至粗轧机,传送装置上设有相应的保温罩;粗轧时对板坯进行5道次轧制,一道次压下率为25.1-26.3%;二道次压下率为27.1-29.5%;三道次压下率为28.2-31.3%;四道次压下率为14.5-16.8%;五道次压下率为10.1-14.2%。
3)精轧:经过传输进入精轧机构,精轧开轧温度设为1050-1070℃;精轧结束温度>850℃。
4)卷取:精轧后送入卷取机构进行卷取。
5)开卷及焊接:通过焊接机构将相邻两组钢板进行焊接固定,便于钢板整体酸洗。
6)退火:通过退火机构对合金板进行退火处理,然后进行冷却。
7)破磷抛丸;通过抛丸机对退火后的合金板进行抛丸处理。
8)酸洗:通过酸洗机构对合金板进行酸洗去除氧化皮;酸洗工艺设有混酸一段,混酸二段;混酸一段HNO3浓度为60±5g/L,HF浓度为5±2g/L,金属离子<40g/L,温度45-55℃;混酸二段HNO3浓度为75±5g/L,HF浓度<0.5g/L,金属离子<40g/L,温度30-35℃。
9)清洗及烘干:通过清洗机构对酸洗后的合金板进行清洗,然后通过烘干系统对合金板进行烘干后再进行收卷处理。
本发明与现有技术相比较有益效果表现在:
1)本发明在酸洗工艺段采用氢氟酸和硝酸进行混酸对铁镍基合金板表面的氧化物等进行酸洗,取消了原有酸洗工艺中使用硫酸酸洗的工艺步骤,降低了污染,避免了使用硫酸酸洗所带来的弊端的产生;
2)本发明采用热连轧的生产方式;通过多段加热控制钢坯的加热过程,使钢坯实现充分加热,降低生产工艺能耗,在粗轧过程中的前三道轧制中使用较高的压下率实现快速轧制,生产效率、成材率以及尺寸精度明显提高。
具体实施方式
为方便本技术领域人员的理解,下面结合实施例1-3,对本发明的技术方案进一步具体说明。
实施例1:
一种N06600铁镍基合金热连轧板卷生产工艺,步骤如下:
1)准备上述组分原料至加热炉进行加热,板坯厚度为235mm;预热段,温度控制在700-750℃,加热时间设为60min;预热段完成后进入加热一段加热,温度控制在1020-1060℃,加热时间设为45min;加热一段完成后进入加热二段加热,温度控制在1150-1180℃,加热时间设为55min;加热二段完成后进入均热段,温度控制在1160-1175℃,加热时间设为35min;高温段包括加热二段和均热段,高温段时间为90min,总在炉时间为195min。
2)粗轧:加热后的板坯经过传输辊传送至粗轧机,传送装置上设有相应的保温罩;粗轧时对板坯进行5道次轧制;一道次压下率为25.51%;二道次压下率为27.34%;三道次压下率为28.94%;四道次压下率为15.56%;五道次压下率为11.20%。
3)精轧:经过传输进入精轧机构,精轧开轧温度设为1065℃;精轧结束温度为950℃。
4)卷取:精轧后送入卷取机构进行卷取。
5)开卷及焊接:通过焊接机构将相邻两组钢板进行焊接固定,便于钢板整体酸洗。
6)退火:通过退火机构对合金板进行退火处理,然后进行冷却。
7)破磷抛丸;通过抛丸机对退火后的合金板进行抛丸处理。
8)酸洗:通过酸洗机构对合金板进行酸洗去除氧化皮;酸洗工艺设有混酸一段,混酸二段;混酸一段HNO3浓度为57.5g/L,HF浓度为5.1g/L,金属离子为36g/L,温度为48℃;混酸二段HNO3浓度为58g/L,HF浓度为0.35g/L,金属离子为34.5g/L,温度为31.5℃。
9)清洗及烘干:通过清洗机构对酸洗后的合金板进行清洗,然后通过烘干系统对合金板进行烘干后再进行收卷处理。
实施例2:
与实施例1相比较所不同的是:
步骤1)加热:准备上述组分原料至加热炉进行加热,板坯厚度为230mm,其加热步骤依分为预热段、加热一段、加热二段、均热段;预热段,温度控制在705℃,加热时间设为65min;预热段完成后进入加热一段加热,温度控制在1058℃,加热时间设为45min;加热一段完成后进入加热二段加热,温度控制在1175℃,加热时间设为50min;加热二段完成后进入均热段,温度控制在1170℃,加热时间设为40min;高温段包括加热二段和均热段,高温段时间为90min,总在炉时间为200min。
步骤2)粗轧:粗轧时对板坯进行5道次轧制;一道次压下率为26.05%;二道次压下率为28.10%;三道次压下率为29.05%;四道次压下率为15.05%;五道次压下率为12.15%。
步骤3)精轧:经过传输进入精轧机构,精轧开轧温度设为1060℃;精轧结束温度为925℃。
步骤8)酸洗:混酸二段;混酸一段HNO3浓度为61g/L,HF浓度为6.3g/L,金属离子为34.5g/L,温度为51℃;混酸二段HNO3浓度为59g/L,HF浓度为0.38g/L,金属离子为36g/L,温度为34℃。
实施例3:
与实施例1相比较所不同的是:
步骤1)加热:准备上述组分原料至加热炉进行加热,板坯厚度为240mm,其加热步骤依分为预热段、加热一段、加热二段、均热段;预热段,温度控制在700-750℃,加热时间设为60min;预热段完成后进入加热一段加热,温度控制在1020-1060℃,加热时间设为45min;加热一段完成后进入加热二段加热,温度控制在1150-1180℃,加热时间设为60min;加热二段完成后进入均热段,温度控制在1160-1175℃,加热时间设为35min;高温段包括加热二段和均热段,高温段时间为95min,总在炉时间为200min。
步骤2)粗轧:粗轧时对板坯进行5道次轧制;一道次压下率为25.15%;二道次压下率为28.16%;三道次压下率为29.50%;四道次压下率为15.50%;五道次压下率为11.56%。
步骤3)精轧:经过传输进入精轧机构,精轧开轧温度设为1055℃;精轧结束温度为912℃。
步骤8)酸洗:混酸二段;混酸一段HNO3浓度为62.4g/L,HF浓度为5.85g/L,金属离子为38g/L,温度为52.5℃;混酸二段HNO3浓度为62g/L,HF浓度为0.46g/L,金属离子为38g/L,温度为33.5℃。
依据GB/T2054-2013对以上实施例进行力学性能检测,检测结果如下表所示:
抗拉强度Mpa 延伸强度Mpa 断后伸长率% 结论
实施例1 885 673 8.5 合格
实施例2 893 668 9.6 合格
实施例3 905 694 10.5 合格
以上内容仅仅是对本发明的结构所作的举例和说明,所属本技术领域的技术人员对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代,只要不偏离发明的结构或者超越本权利要求书所定义的范围,均应属于本发明的保护范围。

Claims (5)

1.一种N06600铁镍基合金热连轧板卷生产工艺,其特征在于步骤如下:
1)准备钢坯转运至加热炉进行加热,板坯厚度为220-240mm,其加热步骤依分为预热段、加热一段、加热二段、均热段;
2)粗轧:加热后的板坯经过传输辊传送至粗轧机,传送装置上设有相应的保温罩;
3)精轧:经过传输进入精轧机构;
4)卷取:精轧后送入卷取机构进行卷取;
5)开卷及焊接:通过焊接机构将相邻两组钢板进行焊接固定,便于钢板整体酸洗;
6)退火:通过退火机构对合金板进行退火处理,然后进行冷却;
7)破磷抛丸;通过抛丸机对退火后的合金板进行抛丸处理;
8)酸洗:通过酸洗机构对合金板进行酸洗去除氧化皮;
9)清洗及烘干:通过清洗机构对酸洗后的合金板进行清洗,然后通过烘干系统对合金板进行烘干后再进行收卷处理。
2.根据权利要求1所述的一种N06600铁镍基合金热连轧板卷生产工艺,其特征预热段,温度控制在700-750℃,加热时间设为60-65min;预热段完成后进入加热一段加热,温度控制在1020-1060℃,加热时间设为45-50min;加热一段完成后进入加热二段加热,温度控制在1150-1180℃,加热时间设为50-60min;加热二段完成后进入均热段,温度控制在1160-1175℃,加热时间设为35-40min;高温段包括加热二段和均热段,高温段时间≤95min,总在炉时间为190-210min。
3.根据权利要求1所述的一种N06600铁镍基合金热连轧板卷生产工艺,其特征在于步骤2)粗轧时对板坯进行5道次轧制,一道次压下率为25.1-26.3%;二道次压下率为27.1-29.5%;三道次压下率为28.2-31.3%;四道次压下率为14.5-16.8%;五道次压下率为10.1-14.2%。
4.根据权利要求1所述的一种N06600铁镍基合金热连轧板卷生产工艺,其特征在于步骤8)酸洗工艺设有混酸一段,混酸二段;混酸一段HNO3浓度为60±5g/L,HF浓度为5±2g/L,金属离子<40g/L,温度45-55℃;混酸二段HNO3浓度为75±5g/L,HF浓度<0.5g/L,金属离子<40g/L,温度30-35℃。
5.根据权利要求1所述的一种N06600铁镍基合金热连轧板卷生产工艺,其特征在于步骤3)精轧开轧温度设为1050-1070℃;精轧结束温度>850℃。
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