CN107419211A - 一种电弧喷涂丝材的制备方法 - Google Patents

一种电弧喷涂丝材的制备方法 Download PDF

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CN107419211A
CN107419211A CN201710424373.5A CN201710424373A CN107419211A CN 107419211 A CN107419211 A CN 107419211A CN 201710424373 A CN201710424373 A CN 201710424373A CN 107419211 A CN107419211 A CN 107419211A
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mild
carbon steel
steel strip
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徐啸飞
杨阳
李雪晴
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Changzhou Best Electronics Co Ltd
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    • 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
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/131Wire arc spraying
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/02Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/04Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
    • B21C37/042Manufacture of coated wire or bars
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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
    • 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
    • C23G1/19Iron or steel
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    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00Electroplating: Baths therefor
    • C25D3/02Electroplating: Baths therefor from solutions
    • C25D3/12Electroplating: Baths therefor from solutions of nickel or cobalt
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00Electroplating characterised by the article coated
    • C25D7/06Wires; Strips; Foils
    • C25D7/0614Strips or foils

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Abstract

本发明公开了一种电弧喷涂丝材的制备方法,属于热喷涂材料制备技术领域。本发明以氢氧化钠,碳酸钠,磷酸钠,硅酸钠为原料,制备表面处理液,并将抛光后的低碳钢带浸泡在表面处理液中超声清洗,再以硝酸镍、硼酸、氯化铝等配置电镀液,将低碳钢带与镍条通电后放置在电镀液中进行电镀,制得复合镀层低碳钢带,再用成型辊将低碳钢带弯曲成U型,填充药芯粉料后封闭压紧,最后逐级拉拔减径制得电弧喷涂丝材,本发明制备的高速电弧喷涂丝材表面粗糙度较低,耐腐蚀性能良好,涂层金属相与陶瓷相分布均匀,可满足不同表面喷涂需求。

Description

一种电弧喷涂丝材的制备方法
技术领域
本发明公开了一种电弧喷涂丝材的制备方法,属于热喷涂材料制备技术领域。
背景技术
随着工程机械设备的性能要求的不断提高,热喷涂技术的不断完善和发展,在各种新型、优质热喷涂技术不断涌现、热喷涂工艺设备不断改进的情况下,热喷涂材料已经成为制约热喷涂技术应用和发展的关键,也是热喷涂技术发展的强大动力。
电弧喷涂技术是热喷涂技术中成本最低、最适宜大面积推广的一种,电弧喷涂技术工程化应用越来越广泛,逐渐发展成为最受青睐的热喷涂技术之一。电弧喷涂的原理是利用电弧将喷涂丝材加热至溶化或半溶化状态,然后以一定的速度喷射沉积到经过预处理的基体表面形成涂层。然而,电弧喷涂的原理决定了它一般只能采用导电的丝材进行喷涂,所以很多高硬、高耐磨、延展性差的、不能导电的实心丝材就难以应用于电弧喷涂。
目前,电弧喷涂丝材以粉芯丝材为主,它是以金属外皮(一般是适宜轧拔的低碳钢、镍、铝、铜、不锈钢等带材)包裹着不同类型的填充物(如各种合金、氧化物、碳化物等)构成。这种丝材的制作类似于焊接所用的药芯焊丝,包括配粉、混粉以及轧丝、拔丝、绕丝、包装等工序。其制作方法比常规丝材加工方法生产周期短、调节成分容易,并且可以制造特殊功能的涂层。与实芯丝材和粉末相比,电弧喷涂粉芯丝材同时兼具两种材料的优点,克服了它们各自的不足,既能方便的根据涂层成分要求来调节线材成分,以获得各种成分、特殊性能的涂层,同时加工方便、成本低、使用设备简单、操作方便,因此电弧喷涂粉芯线材具有巨大的发展潜力。
然而,前制备的电弧喷涂粉芯丝材也存在一些缺陷,主要是喷涂获得的涂层表面粗糙度高,耐腐蚀性较差,限制了电弧喷涂丝材使用。因此,如何克服现有技术不足,成为业内亟待解决的问题。
发明内容
本发明所要解决的技术问题:针对目前制备的电弧喷涂丝材喷涂获得的涂层表面粗糙度高,耐腐蚀性较差,限制了电弧喷涂丝材使用的问题,提供了一种电弧喷涂丝材的制备方法。
为解决上述技术问题,本发明采用的技术方案是:
(1)将低碳钢带抛光后,在70~80℃下,用表面处理液超声清洗15~20min,再经醇洗、酸洗后与镍条浸没在电镀液中,电镀20~30min后取出干燥得复合镀层低碳钢带;
(2)将铬粉、镍粉、碳化硅、硼化铁、钛粉、二氧化锰、五氧化二铌配置成药芯粉料;
(3)将复合镀层低碳钢带弯曲成U型断面,并将药芯粉料通过送粉器填充到U型槽中,再用成型辊将填充的带材封闭并压紧,得封闭丝材;
(4)将封闭丝材装入拔丝模中,进行逐级拉拔减径,控制每次减径量为0.20~0.25mm,拉拔减径至直径为2.0~2.5mm的喷涂丝材,得电弧喷涂丝材。
所述步骤(1)中表面处理液为下述重量份原料组成:
15~20份氢氧化钠,15~20份碳酸钠,32~40份磷酸钠,3~5份硅酸钠,800~1000份去离子水,1~2份烷基酚聚氧乙烯醚。
所述步骤(1)中电镀液为下述重量份原料组成:
30~32份硝酸镍,18~24份硼酸,20~25份氯化铝,0.02~0.03份十二烷基硫酸钠,800~1000份去离子水。
所述步骤(1)中电镀过程具体为将低碳钢带与镍条完全浸没在电镀液中并通电,控制电流密度为2~4A/dm2,持续通电20~30min。
所述步骤(2)中各原料的重量份为:
16~18份铬粉,1.2~1.5份镍粉,0.7~0.9份碳化硅,1.8~2.4份硼化铁,0.5~0.6份钛粉,1.4~1.6份二氧化锰,0.15~0.18份五氧化二铌。
所述步骤(3)中药芯粉料填充率为20~30%。
本发明的有益技术效果是:
本发明将低碳钢带抛光除油后,再以硝酸镍、硼酸、氯化铝等配置电镀液,将低碳钢带与镍条通电后放置在电镀液中进行电镀,在低碳钢带表面镀覆一层复合镀膜,再用成型辊将低碳钢带弯曲成U型,填充铬粉、镍粉、碳化硅、硼化铁、钛粉、二氧化锰、五氧化二铌复合而成的药芯粉料后封闭压紧,最后逐级拉拔减径制得电弧喷涂丝材,本发明制备的电弧喷涂丝材喷涂过程中,镀层先融化包覆药芯粉料,并优先氧化快速挥发,降低了飞行粒子周围的氧分压及氧化几率,同时使熔融粒子粘度增大,使得其比表面积减小,从而降低氧化几率,且喷涂时熔融的液态熔滴在压缩空气的作用下,高速撞击基材表面或已沉积涂层表面后,均匀铺展形成“锚钩效应”,提高了涂层和基体的结合能力,此外,熔融粒子对已沉积层进行的二次加热,提高了熔滴的流动性和铺展性,从而使粒子与粒子间发生微区冶金结合,形成致密度高且表面粗糙度较低的耐腐蚀性能良好的涂层。
具体实施方式
称取15~20g氢氧化钠,15~20g碳酸钠,32~40g磷酸钠,3~5g硅酸钠,加入800~1000mL去离子水中,以300~400r/min搅拌20~30min,再加入1~2g烷基酚聚氧乙烯醚,继续搅拌10~15min,得表面处理液,剪取10cm×10mm×0.4mm低碳钢带,用抛光机打磨抛光至表面光洁,再将抛光后的低碳钢带置于超声波清洗机中,加入500~600mL表面处理液,在70~80℃下,以800~1000W超声波超声清洗15~20min,取出低碳钢带并用无水乙醇洗涤低碳钢带3~5次,得抛光除油处理低碳钢带,称取30~32g硝酸镍,18~24g硼酸,20~25g氯化铝,0.02~0.03g十二烷基硫酸钠,加入800~1000mL去离子水中,以300~400r/min搅拌1~2h,得电镀液,用质量分数为1%盐酸清洗抛光除油处理低碳钢带2~3次,得预处理低碳钢带,再将预处理低碳钢带与镍条完全浸没在电镀液中并通电,控制电流密度为2~4A/dm2,持续电镀20~30min,取出低碳钢带并置于鼓风干燥箱中,在200~300℃下干燥15~20min,得复合镀层低碳钢带,称取16~18g铬粉,1.2~1.5g镍粉,0.7~0.9g碳化硅,1.8~2.4g硼化铁,0.5~0.6g钛粉,1.4~1.6g二氧化锰,0.15~0.18g五氧化二铌,装入研钵中研磨1~2h,过100目筛,得药芯粉料,用成型辊将复合镀层低碳钢带弯曲成U型断面,并称取1~3g药芯粉料通过送粉器填充到U型槽中,再用成型辊将填充的带材封闭并压紧,得封闭丝材,将封闭丝材装入拔丝模中,进行逐级拉拔减径,控制每次减径量为0.20~0.25mm,拉拔减径至直径为2.0~2.5mm的喷涂丝材,得电弧喷涂丝材。
实例1
称取15g氢氧化钠,15g碳酸钠,32g磷酸钠,3g硅酸钠,加入800mL去离子水中,以300r/min搅拌20min,再加入1g烷基酚聚氧乙烯醚,继续搅拌10min,得表面处理液,剪取10cm×10mm×0.4mm低碳钢带,用抛光机打磨抛光至表面光洁,再将抛光后的低碳钢带置于超声波清洗机中,加入500mL表面处理液,在70℃下,以800W超声波超声清洗15min,取出低碳钢带并用无水乙醇洗涤低碳钢带3次,得抛光除油处理低碳钢带,称取30g硝酸镍,18g硼酸,20g氯化铝,0.02g十二烷基硫酸钠,加入800mL去离子水中,以300r/min搅拌1h,得电镀液,用质量分数为1%盐酸清洗抛光除油处理低碳钢带2次,得预处理低碳钢带,再将预处理低碳钢带与镍条完全浸没在电镀液中并通电,控制电流密度为2A/dm2,持续电镀20min,取出低碳钢带并置于鼓风干燥箱中,在200℃下干燥15min,得复合镀层低碳钢带,称取16g铬粉,1.2g镍粉,0.7g碳化硅,1.8g硼化铁,0.5g钛粉,1.4g二氧化锰,0.15g五氧化二铌,装入研钵中研磨1h,过100目筛,得药芯粉料,用成型辊将复合镀层低碳钢带弯曲成U型断面,并称取1g药芯粉料通过送粉器填充到U型槽中,再用成型辊将填充的带材封闭并压紧,得封闭丝材,将封闭丝材装入拔丝模中,进行逐级拉拔减径,控制每次减径量为0.20mm,拉拔减径至直径为2.0mm的喷涂丝材,得电弧喷涂丝材。
实例2
称取18g氢氧化钠,18g碳酸钠,36g磷酸钠,4g硅酸钠,加入900mL去离子水中,以350r/min搅拌25min,再加入1g烷基酚聚氧乙烯醚,继续搅拌13min,得表面处理液,剪取10cm×10mm×0.4mm低碳钢带,用抛光机打磨抛光至表面光洁,再将抛光后的低碳钢带置于超声波清洗机中,加入550mL表面处理液,在75℃下,以900W超声波超声清洗18min,取出低碳钢带并用无水乙醇洗涤低碳钢带4次,得抛光除油处理低碳钢带,称取31g硝酸镍,21g硼酸,23g氯化铝,0.02g十二烷基硫酸钠,加入900mL去离子水中,以350r/min搅拌1h,得电镀液,用质量分数为1%盐酸清洗抛光除油处理低碳钢带2次,得预处理低碳钢带,再将预处理低碳钢带与镍条完全浸没在电镀液中并通电,控制电流密度为3A/dm2,持续电镀25min,取出低碳钢带并置于鼓风干燥箱中,在250℃下干燥18min,得复合镀层低碳钢带,称取17g铬粉,1.4g镍粉,0.8g碳化硅,2.1g硼化铁,0.5g钛粉,1.5g二氧化锰,0.17g五氧化二铌,装入研钵中研磨1h,过100目筛,得药芯粉料,用成型辊将复合镀层低碳钢带弯曲成U型断面,并称取3g药芯粉料通过送粉器填充到U型槽中,再用成型辊将填充的带材封闭并压紧,得封闭丝材,将封闭丝材装入拔丝模中,进行逐级拉拔减径,控制每次减径量为0.23mm,拉拔减径至直径为2.3mm的喷涂丝材,得电弧喷涂丝材。
实例3
称取20g氢氧化钠,20g碳酸钠,40g磷酸钠,5g硅酸钠,加入1000mL去离子水中,以400r/min搅拌30min,再加入2g烷基酚聚氧乙烯醚,继续搅拌15min,得表面处理液,剪取10cm×10mm×0.4mm低碳钢带,用抛光机打磨抛光至表面光洁,再将抛光后的低碳钢带置于超声波清洗机中,加入600mL表面处理液,在80℃下,以1000W超声波超声清洗20min,取出低碳钢带并用无水乙醇洗涤低碳钢带5次,得抛光除油处理低碳钢带,称取32g硝酸镍,24g硼酸,25g氯化铝,0.03g十二烷基硫酸钠,加入1000mL去离子水中,以400r/min搅拌2h,得电镀液,用质量分数为1%盐酸清洗抛光除油处理低碳钢带3次,得预处理低碳钢带,再将预处理低碳钢带与镍条完全浸没在电镀液中并通电,控制电流密度为4A/dm2,持续电镀30min,取出低碳钢带并置于鼓风干燥箱中,在300℃下干燥20min,得复合镀层低碳钢带,称取18g铬粉,1.5g镍粉,0.9g碳化硅,2.4g硼化铁,0.6g钛粉,1.6g二氧化锰,0.18g五氧化二铌,装入研钵中研磨2h,过100目筛,得药芯粉料,用成型辊将复合镀层低碳钢带弯曲成U型断面,并称取3g药芯粉料通过送粉器填充到U型槽中,再用成型辊将填充的带材封闭并压紧,得封闭丝材,将封闭丝材装入拔丝模中,进行逐级拉拔减径,控制每次减径量为0.25mm,拉拔减径至直径为2.5mm的喷涂丝材,得电弧喷涂丝材。
分别以实例1~3制得的电弧喷涂丝材和市售电弧喷涂粉芯丝材(对比例)为喷涂材料,采用电弧喷涂设备对表面喷砂处理后的20号钢进行喷涂,控制喷涂厚度为0.5mm,喷涂工艺参数如下:电弧电压为30V,工作电流为30A,喷涂距离180mm,压缩空气压力0.5MPa。对喷涂后的涂层进行性能检测,其检测结果如下表1:
表1
检测项目 对比例 实例1 实例2 实例3
拉断强度(MPa) 43.3 43.8 44.6 45.2
结合强度(MPa) 41.6 42.3 44.5 46.8
涂层孔隙率(%) 1.9 1.7 1.4 1.3
涂层硬度(HV) 680 720 750 780
表面粗糙度(μm) 45 34 28 20
盐雾腐蚀(5%的氯化钠盐水溶液浸泡)/h 240 260 280 320
综上所述,本发明制备的电弧喷涂丝材喷涂获得的涂层表面粗糙度较小,同时涂层耐腐蚀性能良好,有效提高了基材使用寿命。

Claims (6)

1.一种电弧喷涂丝材的制备方法,其特征在于具体制备步骤为:
(1)将低碳钢带抛光后,在70~80℃下,用表面处理液超声清洗15~20min,再经醇洗、酸洗后与镍条浸没在电镀液中,电镀20~30min后取出干燥得复合镀层低碳钢带;
(2)将铬粉、镍粉、碳化硅、硼化铁、钛粉、二氧化锰、五氧化二铌配置成药芯粉料;
(3)将复合镀层低碳钢带弯曲成U型断面,并将药芯粉料通过送粉器填充到U型槽中,再用成型辊将填充的带材封闭并压紧,得封闭丝材;
(4)将封闭丝材装入拔丝模中,进行逐级拉拔减径,控制每次减径量为0.20~0.25mm,拉拔减径至直径为2.0~2.5mm的喷涂丝材,得电弧喷涂丝材。
2.如权利要求1所述的一种电弧喷涂丝材的制备方法,其特征在于,所述步骤(1)中表面处理液为下述重量份原料组成:
15~20份氢氧化钠,15~20份碳酸钠,32~40份磷酸钠,3~5份硅酸钠,800~1000份去离子水,1~2份烷基酚聚氧乙烯醚。
3.如权利要求1所述的一种电弧喷涂丝材的制备方法,其特征在于,所述步骤(1)中电镀液为下述重量份原料组成:
30~32份硝酸镍,18~24份硼酸,20~25份氯化铝,0.02~0.03份十二烷基硫酸钠,800~1000份去离子水。
4.如权利要求1所述的一种电弧喷涂丝材的制备方法,其特征在于,所述步骤(1)中电镀过程具体为将低碳钢带与镍条完全浸没在电镀液中并通电,控制电流密度为2~4A/dm2,持续通电20~30min。
5.如权利要求1所述的一种电弧喷涂丝材的制备方法,其特征在于,所述步骤(2)中各原料的重量份为:
16~18份铬粉,1.2~1.5份镍粉,0.7~0.9份碳化硅,1.8~2.4份硼化铁,0.5~0.6份钛粉,1.4~1.6份二氧化锰,0.15~0.18份五氧化二铌。
6.如权利要求1所述的一种电弧喷涂丝材的制备方法,其特征在于,所述步骤(3)中药芯粉料填充率为20~30%。
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