CN107379670A - 三层复合厚膜自润滑轴承材料 - Google Patents
三层复合厚膜自润滑轴承材料 Download PDFInfo
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- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
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- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
- B22F7/04—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- 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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/20—Sliding surface consisting mainly of plastics
- F16C33/203—Multilayer structures, e.g. sleeves comprising a plastic lining
- F16C33/206—Multilayer structures, e.g. sleeves comprising a plastic lining with three layers
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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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/20—Sliding surface consisting mainly of plastics
- F16C33/208—Methods of manufacture, e.g. shaping, applying coatings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/554—Wear resistance
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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
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
- F16C2208/20—Thermoplastic resins
- F16C2208/30—Fluoropolymers
- F16C2208/32—Polytetrafluorethylene [PTFE]
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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
- F16C2220/00—Shaping
- F16C2220/40—Shaping by deformation without removing material
- F16C2220/44—Shaping by deformation without removing material by rolling
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- General Engineering & Computer Science (AREA)
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Abstract
本发明提供了三层复合厚膜自润滑轴承材料,其材料的表面的PTFE层可达到0.2mm~0.3mm,使得其能在高温工况下使用,且在不稳定的变载荷工况条件下材料性能稳定,保证润滑轴承的稳定性能。其包括厚度为0.25mm~3mm的金属背衬层、厚度为0.2mm~0.3mm的中间烧结层、厚度为0.2mm~0.3mm的改性PTFE混合物涂层,改性PTFE混合物涂层的材质具体为如下方法获得,30%~40%PFA粉、PTFE粉进行干粉混合,然后混合好的干粉与30%~50%分散PTFE乳液进行湿法混合、得到泥膏状PTFE混合物,其中百分比所对应的数值为质量百分比。
Description
技术领域
本发明涉及轴承材料的技术领域,具体为三层复合厚膜自润滑轴承材料,本发明还提供了三层复合厚膜自润滑轴承材料的制备方法。
背景技术
目前市场上应用的三层复合自润滑轴承材料采用金属背衬烧结一层锡青铜粉表面轧制改性PTFE混合物,其表面轧制的PTFE厚度只有0.01-0.03mm,其制成的滑动轴套在装配后,因其表面PTFE层厚度太薄,其一内孔表面不能加工,无法满足部分工业场合对高精度配合的要求;其二表面涂层磨损厚摩擦系数产生变化,无法满足部分需要长时间稳定摩擦的工业工况要求。目前市场上还有一种二层复合自润滑轴承材料采用金属背衬与PTFE混合物制成的带通过粘接复合而成,其表面的PTFE层可达到0.2-0.3mm,其制成的滑动轴套能满足上述两种工况的安装及摩擦的要求,但其因为是粘接复合而成,受粘接剂及粘接复合工艺条件的限制,其在部分高温使用工况下达不到使用要求,在不稳定的变载荷的工况条件下会产生剥离失效情况。
发明内容
针对上述问题,本发明提供了三层复合厚膜自润滑轴承材料,其材料的表面的PTFE层可达到0.2mm~0.3mm,使得其能在高温工况下使用,且在不稳定的变载荷工况条件下材料性能稳定,保证润滑轴承的稳定性能。
三层复合厚膜自润滑轴承材料,其特征在于:其包括厚度为0.25mm~3mm的金属背衬层、厚度为0.2mm~0.3mm的中间烧结层、厚度为0.2mm~0.3mm的改性PTFE混合物涂层,改性PTFE混合物涂层的材质具体为如下方法获得,30%~40%PFA粉、PTFE粉进行干粉混合,然后混合好的干粉与30%~50%分散PTFE乳液进行湿法混合、得到泥膏状PTFE混合物,其中百分比所对应的数值为质量百分比。
其进一步特征在于:
所述金属背衬层具体为金属板材;
所述中间烧结层具体为锡青铜球形粉。
三层复合厚膜自润滑轴承材料的制备方法,其特征在于:预先制备改性PTFE混合物涂层的原材料,其制作方法如下,30%~40%PFA粉、PTFE粉进行干粉混合,然后混合好的干粉与30%~50%分散PTFE乳液进行湿法混合、得到泥膏状PTFE混合物;之后将0.25mm~3mm厚的金属板材为背衬,在金属背衬烧结厚度为0.2mm~0.3mm的锡青铜球形粉,之后在中间烧结层的外层表面轧制厚度为0.2mm~0.3mm的改性PTFE混合物涂层,其中百分比所对应的数值为质量百分比。
其进一步特征在于:所述轧制工艺中的轧制温度为380℃,其连续轧制速度为0.5米/分钟。
采用本发明后,PFA与PTFE有相同的摩擦磨损特性,在摩擦磨损特性上与普通三层复合材料一致,这样制备的三层复合厚膜自润滑轴承材料,具有普通三层复合自润滑材料耐高温、适合变载荷工况和具备二层粘接复合材料涂层厚适合装配后精加工的优点,满足了特殊工况的使用要求;其材料的表面的PTFE层可达到0.2~0.3mm,使得其能在高温工况下使用,且在不稳定的变载荷工况条件下材料性能稳定,保证润滑轴承的稳定性能。
具体实施方式
三层复合厚膜自润滑轴承材料:其包括厚度为0.25mm~3mm的金属背衬层、厚度为0.2mm~0.3mm的中间烧结层、厚度为0.2mm~0.3mm的改性PTFE混合物涂层,改性PTFE混合物涂层的材质具体为如下方法获得,30%~40%PFA粉、PTFE粉进行干粉混合,然后混合好的干粉与30%~50%分散PTFE乳液进行湿法混合、得到泥膏状PTFE混合物,其中百分比所对应的数值为质量百分比。
金属背衬层具体为金属板材;
中间烧结层具体为锡青铜球形粉;
PFA所对应的中文名称如下少量全氟丙基全氟乙烯基醚与聚四氟乙烯的共聚物;
PTFE为Polytetrafluoroethylene的简写,其所对应的中文名称为聚四氟乙烯。
具体实施例一:厚度为0.25mm的金属板材作为金属背衬层、厚度为0.2mm的中间烧结锡青铜球形粉层、厚度为0.2mm的改性PTFE混合物涂层。
具体实施例二:厚度为3mm的金属板材作为金属背衬层、厚度为0.3mm的中间烧结锡青铜球形粉层、厚度为0.3mm的改性PTFE混合物涂层。
具体实施例三:厚度为1.6mm的金属板材作为金属背衬层、厚度为0.25mm的中间烧结锡青铜球形粉层、厚度为0.25mm的改性PTFE混合物涂层。
三层复合厚膜自润滑轴承材料的制备方法,其特征在于:预先制备改性PTFE混合物涂层的原材料,其制作方法如下,30%~40%PFA粉、PTFE粉进行干粉混合,然后混合好的干粉与30%~50%分散PTFE乳液进行湿法混合、得到泥膏状PTFE混合物;之后将0.25mm~3mm厚的金属板材为背衬,在金属背衬烧结厚度为0.2mm~0.3mm的锡青铜球形粉,之后在中间烧结层的外层表面轧制厚度为0.2mm~0.3mm的改性PTFE混合物涂层,,其中百分比所对应的数值为质量百分比。
轧制工艺中的轧制温度为380℃,其连续轧制速度为0.5米/分钟。
采用本发明后,30%~40%PFA粉添加20~30%PTFE粉进行干粉混合,然后混合好的干粉与30%~50%分散PTFE乳液进行湿法混合,得到泥膏状PTFE混合物,其PTFE混合物具有更好的特性,在轧制达到与烧结铜粉板一致的延伸,且PFA与PTFE有相同的摩擦磨损特性,在摩擦磨损特性上与普通三层复合材料一致,这样制备的三层复合厚膜自润滑轴承材料,具有普通三层复合自润滑材料耐高温、适合变载荷工况和具备二层粘接复合材料涂层厚适合装配后精加工的优点,满足了特殊工况的使用要求。
以上对本发明的具体实施例进行了详细说明,但内容仅为本发明创造的较佳实施例,不能被认为用于限定本发明创造的实施范围。凡依本发明创造申请范围所作的均等变化与改进等,均应仍归属于本专利涵盖范围之内。
Claims (5)
1.三层复合厚膜自润滑轴承材料,其特征在于:其包括厚度为0.25mm~3mm的金属背衬层、厚度为0.2mm~0.3mm的中间烧结层、厚度为0.2mm~0.3mm的改性PTFE混合物涂层,改性PTFE混合物涂层的材质具体为如下方法获得,30%~40%PFA粉、PTFE粉进行干粉混合,然后混合好的干粉与30%~50%分散PTFE乳液进行湿法混合、得到泥膏状PTFE混合物,其中百分比所对应的数值为质量百分比。
2.如权利要求1所述的三层复合厚膜自润滑轴承材料,其特征在于:所述金属背衬层具体为金属板材。
3.如权利要求1所述的三层复合厚膜自润滑轴承材料,其特征在于:所述中间烧结层具体为锡青铜球形粉。
4.三层复合厚膜自润滑轴承材料的制备方法,其特征在于:预先制备改性PTFE混合物涂层的原材料,其制作方法如下,30%~40%PFA粉、PTFE粉进行干粉混合,然后混合好的干粉与30%~50%分散PTFE乳液进行湿法混合、得到泥膏状PTFE混合物;之后将0.25mm~3mm厚的金属板材为背衬,在金属背衬烧结厚度为0.2mm~0.3mm的锡青铜球形粉,之后在中间烧结层的外层表面轧制厚度为0.2mm~0.3mm的改性PTFE混合物涂层,其中百分比所对应的数值为质量百分比。
5.如权利要求4所述的三层复合厚膜自润滑轴承材料的制备方法,其特征在于:所述轧制工艺中的轧制温度为380℃,其连续轧制速度为0.5米/分钟。
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