CN103205736A - 镀膜件及其制备方法 - Google Patents

镀膜件及其制备方法 Download PDF

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CN103205736A
CN103205736A CN2012100072689A CN201210007268A CN103205736A CN 103205736 A CN103205736 A CN 103205736A CN 2012100072689 A CN2012100072689 A CN 2012100072689A CN 201210007268 A CN201210007268 A CN 201210007268A CN 103205736 A CN103205736 A CN 103205736A
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plated film
wearing layer
particle
film spare
tungsten carbide
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曹达华
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Shenzhen Futaihong Precision Industry Co Ltd
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Priority to US13/603,507 priority patent/US20130177777A1/en
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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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    • C23C18/00Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/31Coating with metals
    • C23C18/32Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
    • C23C18/34Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents
    • C23C18/36Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents using hypophosphites
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    • C22CALLOYS
    • C22C1/00Making non-ferrous alloys
    • C22C1/02Making non-ferrous alloys by melting
    • 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
    • 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
    • C23C18/00Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/1601Process or apparatus
    • C23C18/1633Process of electroless plating
    • C23C18/1655Process features
    • C23C18/1662Use of incorporated material in the solution or dispersion, e.g. particles, whiskers, wires
    • 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
    • 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
    • C23C18/00Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/18Pretreatment of the material to be coated
    • C23C18/1803Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces
    • C23C18/1824Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by chemical pretreatment
    • C23C18/1837Multistep pretreatment
    • C23C18/1844Multistep pretreatment with use of organic or inorganic compounds other than metals, first
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/12All metal or with adjacent metals
    • Y10T428/12014All metal or with adjacent metals having metal particles
    • Y10T428/12028Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12146Nonmetal particles in a component

Abstract

本发明提供一种镀膜件,包括金属基体及形成于该金属基体表面的耐磨层,该耐磨层是分散有聚四氟乙烯颗粒及碳化钨颗粒的非晶态磷-镍合金层。该镀膜件同具有优异的耐磨性能。本发明还提供一种上述镀膜件的制备方法。

Description

镀膜件及其制备方法
技术领域
本发明涉及一种镀膜件,尤其涉及一种耐磨性能良好的镀膜件及其制备方法。
背景技术
对于滑盖及翻盖手机来说,滑轨件及转轴的使用频率非常高,因此,滑轨件及转轴磨损速度非常快,从而导致摩擦系数大增,严重影响滑轨件及转轴的使用寿命及用户体验。
发明内容
有鉴于此,本发明提供一种耐磨性能良好的镀膜件,其可用于手机滑轨及转轴。
另外,本发明还提供一种上述镀膜件的制备方法。
一种镀膜件,包括金属基体及形成于该金属基体表面的耐磨层,该耐磨层是分散有聚四氟乙烯颗粒及碳化钨颗粒的非晶态磷-镍合金层。
一种镀膜件的制备方法,包括在金属基材上化学镀一耐磨层,化学镀该耐磨层的镀液为含以下组分的水溶液:NiSO4·6H2O,20g/L-25g/L;NaH2PO2·H2O,20g/L-25g/L;聚四氟乙烯颗粒,4g/L-8g/L;碳化钨颗粒,1g/L-3g/L;醋酸钠,10g/L-15g/L;柠檬酸,10g/L-15g/L;乳酸,15g/L-20g/L;氟碳型阳离子表面活性剂,0.05g/L-0.3g/L;氟化钠,0.05g/L-0.3g/L;该镀液的pH值范围为4.0-5.0,温度为88℃-92℃。
上述镀膜件表面形成有该耐磨层,该耐磨层以非晶结构的磷-镍合金为载体,具有优异的耐腐蚀性能及耐磨性能。该耐磨层中还分散有聚四氟乙烯颗粒,聚四氟乙烯颗粒具有良好的自润滑性能,显著降低了膜层的摩擦系数,提升了耐磨层的耐摩擦性能。另外,该耐磨层中还分散有碳化钨颗粒,碳化钨颗粒为超硬颗粒,碳化钨颗粒的加入,使膜层的耐磨性能大大提升。所以耐磨层同时具有优良的耐磨及耐腐性能,当该镀膜件用作手机等消费性电子产品的转轴及滑轨件,可以大大提高其使用寿命。
上述化学镀该耐磨层在化学镀磷-镍合金的镀液中加入聚四氟乙烯颗粒及碳化钨颗粒,聚四氟乙烯颗粒及碳化钨颗粒在镀液中分散性能较佳,因此在化学沉积的耐磨层中分散有聚四氟乙烯颗粒及碳化钨颗粒,聚四氟乙烯颗粒具有良好的自润滑性能,能显著降低膜层的摩擦系数,碳化钨颗粒为超硬颗粒,使膜层的耐磨性能大大提升。
附图说明
图1是本发明较佳实施例镀膜件的剖视示意图。
主要元件符号说明
镀膜件 10
金属基体 11
耐磨层 13
如下具体实施方式将结合上述附图进一步说明本发明。
具体实施方式
请参阅图1,本发明较佳实施例的镀膜件10包括金属基体11、形成于金属基体11表面的耐磨层13。
金属基体11可以为铁基合金,如碳钢、不锈钢。金属基体11也可为铝合金、镁合金及钛合金。
该耐磨层13是分散有聚四氟乙烯(PTFE)颗粒及碳化钨(WC)颗粒的非晶态磷-镍合金镀层。所述聚四氟乙烯颗粒的粒径大约为30nm-100nm。耐磨层13中聚四氟乙烯颗粒的质量百分含量为6%-20%。所述碳化钨颗粒的粒径大约为50nm-100nm。耐磨层13中碳化钨颗粒的质量百分含量为3%-10%。该耐磨层13通过化学镀膜方法形成。耐磨层13的厚度可为5-15μm。
该镀膜件10可用作电子产品(比如手机)的滑轨、转轴,也可用作其它机械设备的滑轨、转轴等。
上述镀膜件10表面形成有该耐磨层13,该耐磨层13以非晶结构的磷-镍合金为载体,具有优异的耐腐蚀性能及耐磨性能。该耐磨层13中还分散有PTFE颗粒,PTFE颗粒具有良好的自润滑性能,显著降低了膜层的摩擦系数,提升了耐磨层13的耐摩擦性能。另外,该耐磨层13中还分散有WC纳米颗粒,WC纳米颗粒为超硬颗粒,WC纳米颗粒的加入,使膜层的耐磨性能大大提升。所以耐磨层13同时具有优良的耐磨及耐腐性能,当该镀膜件10用作手机等消费性电子产品的转轴及滑轨件,可以大大提高其使用寿命。
该镀膜件10的制备方法,主要包括采用化学镀方法在金属基体11上沉积该耐磨层13。
化学镀该耐磨层13采用的镀液为含以下组分的水溶液:NiSO4·6H2O,20g/L-25g/L;NaH2PO2·H2O,20g/L-25g/L;PTFE颗粒,4g/L-8g/L;WC颗粒,1g/L-3g/L;醋酸钠,10g/L-15g/L;柠檬酸,10g/L-15g/L;乳酸,15g/L-20g/L;氟碳型阳离子表面活性剂(型号为:FC-4),0.05g/L-0.3g/L;氟化钠,0.05g/L-0.3g/L。其中,PTFE颗粒与WC颗粒是以悬浮颗粒的形式均匀分散在镀液中,PTFE颗粒的粒径大约为30nm-100nm,WC颗粒的粒径大约为50nm-100nm。该镀液的pH值范围为4.0-5.0。该镀液的温度为88℃-92℃。化学镀该耐磨层13的时间可以为40min-90min。
由于镀液中分散有PTFE颗粒与WC颗粒,在化学沉积过程中,PTFE颗粒与WC颗粒随着磷和镍共同沉积到金属基体11的表面形成该耐磨层13。
该耐磨层13的摩擦系数为0.18-0.25,维氏硬度为800-910HV(25gf)。而未含PTFE颗粒与WC颗粒的磷-镍合金镀层的摩擦系数一般为0.6-0.7,硬度为500-600HV(25gf)。
优选情况下,该镀膜件10的制备方法还可包括化学镀该耐磨层13前按如下方法及顺序对金属基体11进行前处理:
(a) 除油清洗:可采用常规金属除油液。比如,可采用含30g/L Na3PO4、25g/L Na2CO3及8g/L Na2SiO3的除油液进行清洗,除油液温度为70℃-75℃,清洗时间为2min-5min。
(b) 水洗:去离子水漂洗。
(c) 第一次活化:将金属基体11于室温下的盐酸与水按体积比为1:4配制的溶液中浸置6s-30s。
(d) 水洗:去离子水漂洗。
(e) 酸性浸蚀:将将金属基体11于室温下的硝酸与水按体积比为1:1配制的溶液中浸置3s-5s。
(f) 水洗:去离子水漂洗。
(g) 第二次活化:将金属基体11于室温下的10%的硫酸溶液中浸置50s-60s。
(h) 水洗:去离子水漂洗。
上述化学镀该耐磨层13在化学镀磷-镍合金的镀液中加入PTFE颗粒及WC颗粒,PTFE颗粒及WC颗粒在镀液中分散性能较佳,因此在化学沉积的耐磨层13中分散有PTFE颗粒及WC颗粒,PTFE颗粒具有良好的自润滑性能,能显著降低膜层的摩擦系数,WC颗粒为超硬颗粒,使膜层的耐磨性能大大提升。
下面通过具体实施例对本发明进行进一步详细说明。
实施例1
1. 按如下方法及顺序对碳钢材质的金属基体11进行前处理:
(a) 除油清洗:将金属基体11于70℃-75℃下的含30g/L Na3PO4、25g/L Na2CO3及8g/LNa2SiO3的溶液中清洗2min。
(b) 水洗:去离子水漂洗。
(c) 第一次活化:将金属基体11于室温下的盐酸与水按体积比为1:4配制的溶液中浸置10s。
(d) 水洗:去离子水漂洗。
(e) 酸性浸蚀:将将金属基体11于室温下的硝酸与水按体积比为1:1配制的溶液中浸置3s。
(f) 水洗:去离子水漂洗。
(g) 第二次活化:将金属基体11于室温下的10%的硫酸溶液中浸置50s。
(h) 水洗:去离子水漂洗。
2. 化学镀耐磨层13:化学镀耐磨层13的镀液配方为:NiSO4·6H2O,20g/L;NaH2PO2·H2O,20g/L;PTFE颗粒,4g/L;WC颗粒,1g/L;醋酸钠,10g/L;柠檬酸,10g/L;乳酸,15g/L;氟碳型阳离子表面活性剂(型号为:FC-4),0.05g/L;氟化钠,0.05g/L。其中,PTFE颗粒与WC颗粒是以悬浮颗粒的形式均匀分散在镀液中,PTFE颗粒的粒径大约为30nm-100nm,WC颗粒的粒径大约为50nm-100nm;镀液的pH值为4.0,温度为90℃,沉积时间为40min。镀得耐磨层13的摩擦系数为0.25,硬度为800HV(25gf)。
实施例2
1. 按如下方法及顺序对铝合金材质的金属基体11进行前处理:
(a) 除油清洗:将金属基体11于70℃-75℃下的含30g/L Na3PO4、25g/L Na2CO3及8g/LNa2SiO3的溶液中清洗4min。
(b) 水洗:去离子水漂洗。
(c) 第一次活化:将金属基体11于室温下的盐酸与水按体积比为1:4配制的溶液中浸置10s。
(d) 水洗:去离子水漂洗。
(e) 酸性浸蚀:将将金属基体11于室温下的硝酸与水按体积比为1:1配制的溶液中浸置5s。
(f) 水洗:去离子水漂洗。
(g) 第二次活化:将金属基体11于室温下的10%的硫酸溶液中浸置60s。
(h) 水洗:去离子水漂洗。
2. 化学镀耐磨层13:化学镀耐磨层13的镀液配方为:NiSO4·6H2O,23g/L;NaH2PO2·H2O,23g/L;PTFE颗粒,6g/L;WC颗粒,2g/L;醋酸钠,12g/L;柠檬酸,12g/L;乳酸,18g/L;氟碳型阳离子表面活性剂(型号为:FC-4),0.1g/L;氟化钠,0.1g/L。其中,PTFE颗粒与WC颗粒是以悬浮颗粒的形式均匀分散在镀液中,PTFE颗粒的粒径大约为30nm-100nm,WC颗粒的粒径大约为50nm-100nm;镀液的pH值为4.0,温度为88℃,沉积时间为60min。镀得耐磨层13的摩擦系数为0.2,硬度为850HV(25gf)。
实施例3
1. 按如下方法及顺序对钛合金材质的金属基体11进行前处理:
(a) 除油清洗:将金属基体11于70℃-75℃下的含30g/L Na3PO4、25g/L Na2CO3及8g/LNa2SiO3的溶液中清洗5min。
(b) 水洗:去离子水漂洗。
(c) 第一次活化:将金属基体11于室温下的盐酸与水按体积比为1:4配制的溶液中浸置15s。
(d) 水洗:去离子水漂洗。
(e) 酸性浸蚀:将将金属基体11于室温下的硝酸与水按体积比为1:1配制的溶液中浸置4s。
(f) 水洗:去离子水漂洗。
(g) 第二次活化:将金属基体11于室温下的10%的硫酸溶液中浸置55s。
(h) 水洗:去离子水漂洗。
2. 化学镀耐磨层13:化学镀耐磨层13的镀液配方为:NiSO4·6H2O,25g/L;NaH2PO2·H2O,25g/L;PTFE颗粒,8g/L;WC颗粒,3g/L;醋酸钠,15g/L;柠檬酸,15g/L;乳酸,20g/L;氟碳型阳离子表面活性剂(型号为:FC-4),0.3g/L;氟化钠,0.3g/L。其中,PTFE颗粒与WC颗粒是以悬浮颗粒的形式均匀分散在镀液中,PTFE颗粒的粒径大约为30nm-100nm,WC颗粒的粒径大约为50nm-100nm;镀液的pH值为4.0,温度为92℃,沉积时间为90min。镀得耐磨层13的摩擦系数为0.18,硬度为910HV(25gf)。

Claims (10)

1.一种镀膜件,包括金属基体及形成于该金属基体表面的耐磨层,其特征在于:该耐磨层是分散有聚四氟乙烯颗粒及碳化钨颗粒的非晶态磷-镍合金层。
2.如权利要求1所述的镀膜件,其特征在于:所述聚四氟乙烯颗粒的粒径为30nm-100nm。
3.如权利要求1所述的镀膜件,其特征在于:该耐磨层中聚四氟乙烯颗粒的质量百分含量为6%-20%。
4.如权利要求1所述的镀膜件,其特征在于:所述碳化钨颗粒的粒径为50nm-100nm。
5.如权利要求1所述的镀膜件,其特征在于:该耐磨层中碳化钨颗粒的质量百分含量为3%-10%。
6.如权利要求1所述的镀膜件,其特征在于:该金属基体为铁基合金。
7.如权利要求1所述的镀膜件,其特征在于:该金属基体为铝合金、镁合金及钛合金中的一种。
8.一种镀膜件的制备方法,包括在金属基材上化学镀一耐磨层,化学镀该耐磨层的镀液为含以下组分的水溶液:NiSO4·6H2O,20g/L-25g/L;NaH2PO2·H2O,20g/L-25g/L;聚四氟乙烯颗粒,4g/L-8g/L;碳化钨颗粒,1g/L-3g/L;醋酸钠,10g/L-15g/L;柠檬酸,10g/L-15g/L;乳酸,15g/L-20g/L;氟碳型阳离子表面活性剂,0.05g/L-0.3g/L;氟化钠,0.05g/L-0.3g/L;该镀液的pH值范围为4.0-5.0,温度为88℃-92℃。
9.如权利要求8所述的镀膜件的制备方法,其特征在于:所述聚四氟乙烯颗粒的粒径为30nm-100nm。
10.如权利要求8所述的镀膜件的制备方法,其特征在于:所述碳化钨颗粒的粒径为50nm-100nm。
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