CN106947897A - 一种用于散热装置的铝合金加工工艺 - Google Patents

一种用于散热装置的铝合金加工工艺 Download PDF

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CN106947897A
CN106947897A CN201710380431.9A CN201710380431A CN106947897A CN 106947897 A CN106947897 A CN 106947897A CN 201710380431 A CN201710380431 A CN 201710380431A CN 106947897 A CN106947897 A CN 106947897A
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CN106947897B (zh
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崔立新
赵晓光
成凯
马维红
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Shandong Innovation Precision Technology Co Ltd
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    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
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    • C22F1/002Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/053Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
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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
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    • C23C22/00Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
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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
    • C23CCOATING 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
    • C23C22/00Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/78Pretreatment of the material to be coated
    • CCHEMISTRY; METALLURGY
    • 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
    • C23G1/00Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/12Light metals
    • C23G1/125Light metals aluminium
    • CCHEMISTRY; METALLURGY
    • 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
    • C23G1/00Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/14Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
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Abstract

本发明公开了一种用于散热装置的铝合金加工工艺。依次经过成分优化‑制坯‑挤压‑淬火‑拉伸矫直‑时效处理‑清洗‑镀膜工艺,制备出的铝合金散热片室温抗拉强度不小于320MPa、屈服强度不小于 230MPa、焊后屈服强度为不小于 120MPa,耐腐蚀性强,抗菌性能好。

Description

一种用于散热装置的铝合金加工工艺
技术领域
本发明涉及铝合金技术领域,特别是涉及一种用于散热装置的铝合金加工工艺。
背景技术
目前由铝合金制备的散热装置的散热片已经被广泛应用,其质量轻,强度高,耐磨性好,加工后不易变形,且具有优良的导热性能。热交换器的结构越来越追求轻薄化,结构的改变对铝合金的机械强度和导热性能的平衡提出了更高的要求。
此外,经过长时间使用的散热片表面会存在被表面积存的冷凝水腐蚀以及细菌繁殖的问题,因此,在提高铝合金机械强度和导热性能的同时,还需要对表面进行耐腐蚀以及抗菌处理。
发明内容
本发明就是针对上述存在的缺陷而提供一种用于散热装置的铝合金加工工艺,依次经过成分优化-制坯-挤压-淬火-拉伸矫直-时效处理-清洗-镀膜工艺,制备出的铝合金散热片室温抗拉强度不小于320MPa、屈服强度不小于 230MPa、焊后屈服强度为不小于120MPa,基于JIS Z-2371标准的盐水喷雾试验法,将产品暴露600小时后无变色生锈情况出现,在温度50±1℃、相对湿度95%以上的高温高湿度气氛中的中暴露 2000 小时,无变色生锈情况出现。抗菌性能好。
本发明的一种用于散热装置的铝合金加工工艺技术方案为,依次经过成分优化-制坯-挤压-淬火-拉伸矫直-时效处理-清洗-镀膜工艺,所述铝合金各组分含量为:Si 0.3-0.5%,Fe 0.2-0.3%,Cu 0.02-0.04%,Mn 0.8-1%,Zn 1-1.2%,Mg 0.2-0.5%,Zr 0.1-0.2%,Sr0.02-0.03%,余量为Al和不可避免的杂质。
所述的一种用于散热装置的铝合金加工工艺,依次包括以下步骤:
(1)成分优化;
(2)制坯;
(3)以1-1.2m/min的速度挤压成型;
(4)淬火,淬火方式为风冷+水冷;
(5)拉伸矫直,拉伸率为1-1.3%;
(6)时效处理,在180-185℃下时效处理6h;
(7)清洗,对铝合金工件表面依次用水、丙酮、水清洗;
(8)镀膜,依次经过碱洗、酸洗后浸入膜处理剂中2min,取出后烘干40分钟成膜。
步骤(3)中,挤压成型时模具的温度为520±10℃。
步骤(8)中所述碱洗为,在60-80℃含0.1-0.6M偏铝酸钠和0.2M-0.4M氢氧化钠的水溶液中处理3分钟,然后用水清洗;
步骤(8)中所述酸洗为,在20-30℃质量浓度为4%的硝酸和0.2%氢氟酸溶液中浸泡1分钟,然后用水清洗。
步骤(8)中所述膜处理剂由按重量份的以下成分组成:氢氟酸锆2-5,氟铝酸钾3-5,N-甲基吡咯烷酮0.3-1、磷酸二氢铵1-2、乳酸钠2.4-3,乙二胺四亚甲基膦酸1-3,膦酸丁烷三羧酸1-2,聚乙二醇1000 10-20,硅烷偶联剂KH570 14-20、去离子水100。
步骤(8)中浸入膜处理剂中处理温度为70-80℃。
步骤(8)中烘干温度为120℃。
本发明的有益效果为:本发明依次经过成分优化-制坯-挤压-淬火-拉伸矫直-时效处理-清洗-镀膜工艺,硅(Si)可提高高温时的支撑强度 ;镁(Mg)可以显著提高散热片的屈服强度,提高整体强度 ;锌(Zn)可以降低铝合金腐蚀电位,从而起到电化学防腐蚀作用,显著提高散热器的使用寿命 ;锆(Zr)可以在铝合金中形成 ZrAl3,ZrAl3 在钎焊过程中在晶界析出,可以对晶粒起到钉扎作用,显著提高散热片高温时的抗塌陷作用;锶(Sr)可以在基体内弥散均匀分布的组织,改善材料的力学性能。制备出的铝合金散热片室温抗拉强度不小于320MPa、屈服强度不小于 230MPa、焊后屈服强度为不小于 120MPa,基于JIS Z-2371标准的盐水喷雾试验法,将产品暴露600小时后无变色生锈情况出现,在温度50±1℃、相对湿度95%以上的高温高湿度气氛中的中暴露 2000 小时,无变色生锈情况出现。抗菌性能好。
具体实施方式:
为了更好地理解本发明,下面用具体实例来详细说明本发明的技术方案,但是本发明并不局限于此。
实施例1
本发明的一种用于散热装置的铝合金加工工艺,依次包括以下步骤:
(1)成分优化;各组分含量为:Si 0.5%,Fe 0.3%,Cu 0.04%,Mn 1%,Zn 1.2%,Mg 0.3%,Zr0.2%,Sr 0.03%,余量为Al和不可避免的杂质。
(2)制坯;
(3)以1-1.2m/min的速度挤压成型,挤压成型时模具的温度为520±10℃;
(4)淬火,淬火方式为风冷+水冷;
(5)拉伸矫直,拉伸率为1.2%;
(6)时效处理,在180℃下时效处理6h;
(7)清洗,对铝合金工件表面依次用水、丙酮、水清洗;
(8)镀膜,依次经过碱洗、酸洗后浸入75℃膜处理剂中2min,取出后120℃烘干40分钟成膜。
所述碱洗为,在70℃含0.3M偏铝酸钠和0.4M氢氧化钠的水溶液中处理3分钟,然后用水清洗;
所述酸洗为,在25℃质量浓度为4%的硝酸和0.2%氢氟酸溶液中浸泡1分钟,然后用水清洗。
所述膜处理剂由按重量份的以下成分组成:氢氟酸锆3,氟铝酸钾4,N-甲基吡咯烷酮0.6、磷酸二氢铵1.5、乳酸钠2.8,乙二胺四亚甲基膦酸2,膦酸丁烷三羧酸1.5,聚乙二醇1000 12,硅烷偶联剂KH570 16、去离子水100。
高含量的硅(Si)可提高高温时的支撑强度 ;镁(Mg)含量的增加可以显著提高散热片的屈服强度,提高整体强度 ;锌(Zn)可以降低铝合金腐蚀电位,从而起到电化学防腐蚀作用,显著提高散热器的使用寿命 ;锆(Zr)可以在铝合金中形成 ZrAl3,ZrAl3 在钎焊过程中在晶界析出,可以对晶粒起到钉扎作用,显著提高散热片高温时的抗塌陷作用;锶(Sr)可以在基体内弥散均匀分布的组织,改善材料的力学性能。制备出的铝合金散热片室温抗拉强度不小于320MPa、屈服强度不小于 230MPa、焊后屈服强度为不小于 120MPa,基于JIS Z-2371标准的盐水喷雾试验法,将产品暴露600小时后无变色生锈情况出现,在温度50±1℃、相对湿度95%以上的高温高湿度气氛中的中暴露 2000 小时,无变色生锈情况出现。
使用100h的热交换器取样进行微生物检测,活菌数远远小于同环境使用状态下的市售铝合金热交换器,活菌数为同环境使用状态下的市售铝合金热交换器的1%。

Claims (8)

1.一种用于散热装置的铝合金加工工艺,其特征在于,依次经过成分优化-制坯-挤压-淬火-拉伸矫直-时效处理-清洗-镀膜工艺,所述铝合金各组分含量为:Si 0.3-0.5%,Fe0.2-0.3%,Cu 0.02-0.04%,Mn 0.8-1%,Zn 1-1.2%,Mg 0.2-0.5%,Zr 0.1-0.2%,Sr 0.02-0.03%,余量为Al和不可避免的杂质。
2.根据权利要求1所述的一种用于散热装置的铝合金加工工艺,其特征在于,依次包括以下步骤:
(1)成分优化;
(2)制坯;
(3)以1-1.2m/min的速度挤压成型;
(4)淬火,淬火方式为风冷+水冷;
(5)拉伸矫直,拉伸率为1-1.3%;
(6)时效处理,在180-185℃下时效处理6h;
(7)清洗,对铝合金工件表面依次用水、丙酮、水清洗;
(8)镀膜,依次经过碱洗、酸洗后浸入膜处理剂中2min,取出后烘干40分钟成膜。
3.根据权利要求2所述的一种用于散热装置的铝合金加工工艺,其特征在于,步骤(3)中,挤压成型时模具的温度为520±10℃。
4.根据权利要求2所述的一种用于散热装置的铝合金加工工艺,其特征在于,步骤(8)中所述碱洗为,在60-80℃含0.1-0.6M偏铝酸钠和0.2M-0.4M氢氧化钠的水溶液中处理3分钟,然后用水清洗。
5.根据权利要求2所述的一种用于散热装置的铝合金加工工艺,其特征在于,步骤(8)中所述酸洗为,在20-30℃质量浓度为4%的硝酸和0.2%氢氟酸溶液中浸泡1分钟,然后用水清洗。
6. 根据权利要求2所述的一种用于散热装置的铝合金加工工艺,其特征在于,步骤(8)中所述膜处理剂由按重量份的以下成分组成:氢氟酸锆2-5,氟铝酸钾3-5,N-甲基吡咯烷酮0.3-1、磷酸二氢铵1-2、乳酸钠2.4-3,乙二胺四亚甲基膦酸1-3,膦酸丁烷三羧酸1-2,聚乙二醇1000 10-20,硅烷偶联剂KH570 14-20、去离子水100。
7.根据权利要求2所述的一种用于散热装置的铝合金加工工艺,其特征在于,步骤(8)中浸入膜处理剂中处理温度为70-80℃。
8.根据权利要求2所述的一种用于散热装置的铝合金加工工艺,其特征在于,步骤(8)中烘干温度为120℃。
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Publication number Priority date Publication date Assignee Title
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