CN106544619A - 一种固体润滑的滚珠轴承及其制备方法 - Google Patents
一种固体润滑的滚珠轴承及其制备方法 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C23—COATING 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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- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/32—Balls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6696—Special parts or details in view of lubrication with solids as lubricant, e.g. dry coatings, powder
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- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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Abstract
本发明公开了一种固体润滑的滚珠轴承,所述滚珠表面具有20‑30μm厚度的Ni包覆微米石墨与石墨烯涂层。本发明的复合镀层使得摩擦系数和磨损率同时降低,具有较低的摩擦系数,同时具有比Cr镀层更优良的耐磨性。在各个载荷下,磨损率比基体降低50%以上。
Description
技术领域
本发明涉及汽车配件技术领域,尤其涉及一种固体润滑的滚珠轴承及其制备方法。
背景技术
滚珠轴承是滚动轴承的一种,将球形合金钢珠安装在内钢圈和外钢圈的中间,以滚动方式来降低动力传递过程中的摩擦力和提高机械动力的传递效率。滚珠轴承不能承受较大的重载荷,在轻工业机械中较常见。滚珠轴承也叫球轴承。
而保持器的硬度相较于滚珠与环低,其材料有金属(如:中碳钢、铝合金)或非金属(如:铁弗龙、PTEF、高分子材料)。滚动轴承(rolling bearing)比轴颈轴承(journalbearing)的转动摩擦阻力小,因此相同的转速下,由于摩擦产生的温度会比较低。
滚珠轴承一般是用在低载荷机械传动的设备中。因为滚珠轴承的承载面积小,在高速运转的情况下极易出现严重的机械性损伤,所以在重载荷的机械传动中往往采取滚针式轴承以加大承载面,提高机械传递效率,同时降低机械性损伤。
滚珠轴承改变了轴承的摩擦方式,采用滚动磨擦,这一方式更为有效的降低了轴承面之间的摩擦现象,但所述摩擦方式导致需要采用润滑脂、润滑油进行减少摩擦。由于润滑脂、润滑油会消耗,因此需要定期进行添加,由此导致机械拆装等缺陷。
发明内容
本发明的目的在于提出一种固体润滑的滚珠轴承及其制备方法,能够使得滚珠轴承摩擦减小。
为达此目的,本发明采用以下技术方案:
一种固体润滑的滚珠轴承,所述滚珠表面具有20-30μm厚度的等离子喷涂Ni包覆微米石墨与石墨烯涂层。
本发明所述涂层是Ni包覆微米石墨与石墨烯涂层混合而成。优选的,所述重量比为(3-5):1,优选4:1。
所述混合是采用行星球磨机和离心喷雾造粒机将涂层喷粉。其工艺包括:
(1)将Ni包覆微米石墨颗粒与石墨烯在行星球磨机上球磨至少5分钟;
(2)球磨停止前5分钟时,加入有机黏结剂球磨,得到悬浊液;
(3)将悬浊液进行喷雾造粒,得到Ni包覆微米石墨与石墨烯团聚颗粒。
本发明通过等离子喷涂将所述Ni包覆微米石墨与石墨烯团聚颗粒喷涂到滚珠上。所述等离子喷涂,其电流为400-700A,电压为30-70V,主气氩气流量50-140L/min,送粉速度25-60g/min。优选的,电流为550A,电压30V,氩气流量50L/min。
本发明的复合涂层厚度约为20-30μm,其硬度较基体明显提高,超过500HV0.2。同时,在复合涂层中添加石墨烯使得晶粒得到细化,平均晶粒尺寸下降到20nm左右。
本发明所述的Ni包覆微米石墨颗粒,是现有产品,本领域技术人员可以通过市场购买得到,也可以按照现有技术的方法制备得到。本发明不再就其限定。
本发明的涂层,在摩擦磨损过程中,石墨不断从镍包石墨颗粒中析出,在切向力作用下流动,能对犁沟起到填平作用,因而可以提高主轴的耐磨性。而加入的石墨烯,更加顺滑,附着在主轴表面,减少其摩擦阻力。
本发明的复合涂层使得摩擦系数和磨损率同时降低,具有较低的摩擦系数,同时具有更优良的耐磨性。在各个载荷下,磨损率比基体降低50%以上。
具体实施方式
下面通过具体实施方式来进一步说明本发明的技术方案。
实施例1
采用行星球磨机和离心喷雾造粒机将涂层材料喷粉。其工艺包括:
(1)将Ni包覆微米石墨颗粒与石墨烯在行星球磨机上球磨至少5分钟;
(2)球磨停止前5分钟时,加入有机黏结剂球磨,得到悬浊液;
(3)将悬浊液进行喷雾造粒,得到Ni包覆微米石墨与石墨烯团聚颗粒。
通过等离子喷涂将所述Ni包覆微米石墨与石墨烯团聚颗粒喷涂到滚珠表面上。所述等离子喷涂,其电流为550A,电压30V,氩气流量50L/min。
所述滚珠上的涂层,其起到固体自润滑作用。
对比例1
省略实施例1的石墨烯,其余与实施例1相同。
对比例2
将Ni包覆微米石墨替换为微米石墨,其余与实施例1相同。
对比例1-2的涂层,同样能起到润滑作用,但所述润滑效果稍差,只是相较于不含涂层的滚珠,提高一些。实施例1的润滑效果要明显优于对比例1-2,且耐磨时间长,起到润滑的时间也明显较长。即,本发明的2种材料混合,起到协同作用。
Claims (5)
1.一种固体润滑的滚珠轴承,所述滚珠表面具有20-30μm厚度的Ni包覆微米石墨与石墨烯涂层。
2.如权利要求1所述的滚珠轴承,其特征在于,所述涂层是Ni包覆微米石墨与石墨烯涂层混合而成,其重量比为(3-5):1,优选4:1。
3.如权利要求1或2所述的滚珠轴承,其特征在于,所述混合是采用行星球磨机和离心喷雾造粒机将涂层喷粉,其工艺包括:
(1)将Ni包覆微米石墨颗粒与石墨烯在行星球磨机上球磨至少5分钟;
(2)球磨停止前5分钟时,加入有机黏结剂球磨,得到悬浊液;
(3)将悬浊液进行喷雾造粒,得到Ni包覆微米石墨与石墨烯团聚颗粒。
4.如权利要求1-3之一所述的滚珠轴承,其特征在于,通过等离子喷涂将所述Ni包覆微米石墨与石墨烯团聚颗粒喷涂到风机主轴上得到所述涂层。
5.如权利要求1-4之一所述的滚珠轴承,其特征在于,所述等离子喷涂,其电流为400-700A,电压为30-70V,主气氩气流量50-140L/min,送粉速度25-60g/min;优选的,电流为550A,电压30V,氩气流量50L/min。
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Citations (3)
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CN104662199A (zh) * | 2012-07-23 | 2015-05-27 | 艾默生环境优化技术有限公司 | 用于压缩机磨损表面的抗磨损涂层 |
CN105331210A (zh) * | 2015-10-27 | 2016-02-17 | 江苏友成高分子材料科技有限公司 | 一种石墨烯改性聚四氟乙烯固体润滑涂层及其制备方法 |
EP3006605A1 (fr) * | 2014-10-08 | 2016-04-13 | The Swatch Group Research and Development Ltd. | Revêtement composite auto-lubrifiant |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN104662199A (zh) * | 2012-07-23 | 2015-05-27 | 艾默生环境优化技术有限公司 | 用于压缩机磨损表面的抗磨损涂层 |
EP3006605A1 (fr) * | 2014-10-08 | 2016-04-13 | The Swatch Group Research and Development Ltd. | Revêtement composite auto-lubrifiant |
CN105331210A (zh) * | 2015-10-27 | 2016-02-17 | 江苏友成高分子材料科技有限公司 | 一种石墨烯改性聚四氟乙烯固体润滑涂层及其制备方法 |
Non-Patent Citations (2)
Title |
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赵世海: ""微纳米材料涂层对提高冶金风机耐磨损性能的研究"", 《万方学位论文》 * |
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