CN114082953B - 一种高可焊性镍铜复合带材的制备方法 - Google Patents
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- 239000002131 composite material Substances 0.000 title claims abstract description 42
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 57
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229910052802 copper Inorganic materials 0.000 claims abstract description 45
- 239000010949 copper Substances 0.000 claims abstract description 45
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 28
- 238000005245 sintering Methods 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 238000001513 hot isostatic pressing Methods 0.000 claims abstract description 15
- 238000000137 annealing Methods 0.000 claims abstract description 13
- 238000005097 cold rolling Methods 0.000 claims abstract description 11
- 238000005098 hot rolling Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000010894 electron beam technology Methods 0.000 claims abstract description 8
- 238000011049 filling Methods 0.000 claims abstract description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000001257 hydrogen Substances 0.000 claims abstract description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000009792 diffusion process Methods 0.000 claims description 2
- 238000000280 densification Methods 0.000 abstract description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 3
- 239000001301 oxygen Substances 0.000 abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 15
- 238000003466 welding Methods 0.000 description 10
- 239000002245 particle Substances 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
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- B22F3/12—Both compacting and sintering
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
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Abstract
本发明提供一种高可焊性镍铜复合带材的制备方法,包括以下步骤:S1.将高纯铜粉装填入镍包套中并振实,加热、抽真空,电子束封焊包套后置入热等静压机中进行烧结致密化,得到铜坯带包套;S2.将步骤S1的铜坯带包套在空气加热炉中预热,并进行多道次热轧,轧成所需厚度的板材;S3.将步骤S2的板材在氢气还原炉中还原退火;S4.将还原退火后的板材经冷轧加工成所需规格的镍铜复合带材。本发明的高可焊性镍铜复合带材的制备方法,以高纯铜粉为原料,全流程避免氧的污染,保证了镍铜带材的高导电性能。
Description
技术领域
本发明涉及属于金属复合带材加工技术领域,尤其涉及一种高可焊性镍铜复合带材的制备方法。
背景技术
5G通信、新能源汽车、电池等新兴关键领域对高精度铜薄带提出迫切需求和更高要求,内阻较小的镀镍铜带作为电池极耳的关键材料,一般采用连续电镀柔性镍获得高强度镀层,保证产品的抗冲压性,连续弯折镀层不脱落;但是镍镀层较薄,可焊接性能一般,对焊接工艺要求特别高;同时,电镀是一项高污染、高能耗的技术,与当前国家大力提倡的节能环保战略新要求严重不符。
发明内容
本发明的目的在于克服现有技术中存在的不足,提供一种高可焊性镍铜复合带材的制备方法,在保证镍与铜优异结合性能的前提下,解决现有镀镍铜带表层镍较薄而焊接性能不足的问题。本发明采用的技术方案是:
一种高可焊性镍铜复合带材的制备方法,其中:包括以下步骤:
S1.将高纯铜粉装填入镍包套中并振实,加热、抽真空,电子束封焊包套后置入热等静压机中进行烧结,得到铜坯带包套;
S2.将步骤S1的铜坯带包套在空气加热炉中预热,并进行2~5道次热轧,热轧,轧成1~5 mm厚度的板材;
S3.将步骤S2的板材在氢气还原炉中还原退火;
S4.将还原退火后的板材经3~10道次冷轧加工成0.03~0.5 mm厚度的镍铜复合带材。
优选的是,所述的高可焊性镍铜复合带材的制备方法,其中:所述步骤S1加热温度为250~400℃,加热时间为2~15 h,抽真空至10-3~10-5Pa。
优选的是,所述的高可焊性镍铜复合带材的制备方法,其中:所述步骤S1烧结温度为600~900℃,压力为50~200 MPa,烧结时间为0.5~5 h。
优选的是,所述的高可焊性镍铜复合带材的制备方法,其中:所述步骤S1高纯铜粉的平均粒度为2~45 μm。
优选的是,所述的高可焊性镍铜复合带材的制备方法,其中:所述步骤S1烧结后铜坯带包套截面镍层厚度与铜坯厚度的比例为1:10~1:50。
优选的是,所述的高可焊性镍铜复合带材的制备方法,其中:所述步骤S2预热温度为500~900℃,预热时间为30~90 min。
优选的是,所述的高可焊性镍铜复合带材的制备方法,其中:所述步骤S2热轧的线速为0.1~1 m/s。
优选的是,所述的高可焊性镍铜复合带材的制备方法,其中:所述步骤S3还原温度为400~600℃,还原时间为10~60 min。
优选的是,所述的高可焊性镍铜复合带材的制备方法,其中:所述步骤S4冷轧线速为0.2~2 m/s;镍铜复合带材中镍层厚度为0.01~0.1 mm,铜层厚度为0.01~0.3 mm。
本发明的技术原理为:将高纯铜粉装填镍包套、抽真空、电子束封焊后,经热等静压烧结成致密铜坯体,再经热轧、冷轧成镍铜复合带材,包套热等静压烧结铜坯的氧含量极低,带包套进行热轧避免了空气预热氧化对内部高纯铜的污染,镍铜复合带材导电率高;热等静压过程中实现了铜与镍的互扩散,提高了二者之间的界面结合能力;镍包套不需去除,制备工艺流程短,成品率高。
本发明的优点在于:
(1)本发明的高可焊性镍铜复合带材的制备方法,以高纯铜粉为原料,全流程避免氧的污染,保证了镍铜带材的高导电性能。
(2)本发明的高可焊性镍铜复合带材的制备方法,包套热等静压后直接进行热轧、冷轧,无需去包套,缩短了工艺步骤,提高了生产效率,适合镍铜复合带材的工业化连续生产制造。
具体实施方式
下面结合具体实施例对本发明作进一步说明。
实施例1
一种高可焊性镍铜复合带材的制备方法,其中:包括以下步骤:
S1.将平均粒径为2微米的高纯铜粉装填入镍圆柱形包套中,振实后在包套制作设备中加热至250℃,加热时间为15h,抽真空至10-5Pa,电子束封焊包套后置入热等静压机中进行烧结致密化,烧结温度为600℃,压力为50 MPa,保温保压时间为5 h,得到铜坯带包套,烧结温度为600℃,烧结时间为5h,压力为100Mpa,烧结致密化后铜坯带包套截面镍层厚度与铜坯直径的比例为1:50;
S2.将上述热等静压铜坯带包套在空气加热炉中预热,预热温度为500℃,预热时间为90min,并进行5道次热轧,轧成1mm厚度的板材;
S3.将热轧板材在氢气还原炉中还原退火,还原温度为600℃,还原时间10min;
S4.将还原退火后的板材进行3道次冷轧加工成0.2mm镍铜复合带材,轧制线速为0.2 m/s,镍层厚0.01 mm,铜层厚0.19mm。
经测试,复合带材表面焊接性能良好,带材导电率达99.2%IACS。
实施例2
S1.将平均粒径为45微米的高纯铜粉装填入镍方形包套中,振实后在包套制作设备中加热至400℃,加热时间为2h,抽真空至10-3Pa,电子束封焊包套后置入热等静压机中进行烧结致密化,烧结温度为900℃,压力为200 MPa,保温保压时间为0.5h,得到铜坯带包套,烧结致密化后铜坯带包套截面镍层厚度与铜坯厚度的比例为1:10;
S2.将上述热等静压铜坯带包套在空气加热炉中预热,预热温度为900℃,预热时间为30min,进行3道次热轧,轧成3mm厚度的板材;
S3.将热轧板材在氢气还原炉中加热还原,还原温度为600℃,还原时间为10min;
S4.将还原退火后的板材进行6道次冷轧加工成0.1mm厚度的镍铜复合带材,轧制线速为1 m/s,镍层厚0.02 mm,铜层厚0.08mm。
经测试,复合带材表面焊接性能良好,带材导电率达97.8%IACS。
实施例3
S1.将平均粒径为15微米的高纯铜粉装填入镍圆柱形包套中,振实后在包套制作设备中加热至350℃,加热时间为10h,抽真空至10-4Pa,电子束封焊包套后置入热等静压机中进行烧结致密化,烧结温度为800℃,压力为150 MPa,保温保压时间为2 h,得到铜坯带包套,烧结致密化后铜坯带包套截面镍层厚度与铜坯直径的比例为1:20;
S2,将上述铜坯带包套在空气加热炉中预热,预热温度为700℃,预热时间为60min,进行2道次热轧,轧成成3 mm厚度的板材;
S3.将热轧板材在氢气还原炉中还原退火,还原温度为500℃,退火时间为30min;
S4.将还原退火后的板材进行8道次冷轧加工成0.15 mm厚度的镍铜复合带材,轧制线速为1 m/s,镍层厚0.1 mm,铜层厚0.05 mm。
经测试,复合带材表面焊接性能良好,带材导电率达98.5%IACS。
实施例4
S1.将平均粒径为10微米的高纯铜粉装填入镍方形包套中,振实后在包套制作设备中加热至400℃,保温2 h,抽真空至10-5Pa,电子束封焊包套后置入热等静压机中进行烧结致密化,烧结温度为750℃,压力为100 MPa,保温保压时间为3h,得到铜坯带包套,烧结致密化后铜坯带包套镍层厚度与铜坯厚度的比例为1:30;
S2.将上述热等静压铜坯带包套在空气加热炉中预热,预热温度为900℃,预热时间为30min,进行5道次热轧,轧成1mm厚度的板材;
S3.将热轧板材在氢气还原炉中加热,还原温度为500℃,还原时间为20min;
S4.将还原退火后的板材进行10道次冷轧加工成0.03mm镍铜复合带材,轧制线速为2 m/s,镍层厚0.01 mm,铜层厚0.02 mm。
经测试,复合带材表面焊接性能良好,带材导电率达98.3%IACS。
最后所应说明的是,以上具体实施方式仅用以说明本发明的技术方案而非限制,尽管参照实例对本发明进行了详细说明,本领域的普通技术人员应当理解,可以对本发明的技术方案进行修改或者等同替换,而不脱离本发明技术方案的精神和范围,其均应涵盖在本发明的权利要求范围当中。
Claims (6)
1.一种高可焊性镍铜复合带材的制备方法,其特征在于:包括以下步骤:
S1.将高纯铜粉装填入镍包套中并振实,加热、抽真空,电子束封焊包套后置入热等静压机中进行烧结,得到铜坯带包套;
S2.将步骤S1的铜坯带包套在空气加热炉中预热,并进行2~5道次热轧,轧成1~5 mm厚度的板材;
S3.将步骤S2的板材在氢气还原炉中还原退火;
S4.将还原退火后的板材经3~10道次冷轧加工成0.03~0.5 mm厚度的镍铜复合带材;
步骤S1热等静压过程中实现了铜与镍的互扩散,烧结后铜坯带包套截面镍层厚度与铜坯厚度的比例为1:10~1:50;
所述步骤S1加热温度为250~400℃,加热时间为2~15 h,抽真空至10-3~10-5 Pa;
所述步骤S1烧结温度为600~900℃,压力为50~200 MPa,烧结时间为0.5~5 h。
2.根据权利要求1所述的高可焊性镍铜复合带材的制备方法,其特征在于:所述步骤S1高纯铜粉的平均粒度为2~45 μm。
3.根据权利要求1所述的高可焊性镍铜复合带材的制备方法,其特征在于:所述步骤S2预热温度为500~900℃,预热时间为30~90 min。
4.根据权利要求1所述的高可焊性镍铜复合带材的制备方法,其特征在于:所述步骤S2热轧的线速为0.1~1 m/s。
5.根据权利要求1所述的高可焊性镍铜复合带材的制备方法,其特征在于:所述步骤S3还原温度为400~600℃,还原时间为10~60 min。
6.根据权利要求1所述的高可焊性镍铜复合带材的制备方法,其特征在于:所述步骤S4冷轧线速为0.2~2 m/s;镍铜复合带材中镍层厚度为0.01~0.1 mm,铜层厚度为0.01~0.3mm。
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