CN104451513B - Anti-attrition lubricating coating for squeezing granulator bearing bush and preparation method thereof - Google Patents
Anti-attrition lubricating coating for squeezing granulator bearing bush and preparation method thereof Download PDFInfo
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- CN104451513B CN104451513B CN201310441210.XA CN201310441210A CN104451513B CN 104451513 B CN104451513 B CN 104451513B CN 201310441210 A CN201310441210 A CN 201310441210A CN 104451513 B CN104451513 B CN 104451513B
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- 238000000576 coating method Methods 0.000 title claims abstract description 114
- 239000011248 coating agent Substances 0.000 title claims abstract description 113
- 238000002360 preparation method Methods 0.000 title claims abstract description 42
- 230000001050 lubricating effect Effects 0.000 title abstract 4
- 239000000843 powder Substances 0.000 claims abstract description 24
- 239000000956 alloy Substances 0.000 claims abstract description 14
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 14
- 239000007921 spray Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000000314 lubricant Substances 0.000 claims description 63
- 239000002344 surface layer Substances 0.000 claims description 33
- 238000005516 engineering process Methods 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000007750 plasma spraying Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000006116 polymerization reaction Methods 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 12
- 239000004743 Polypropylene Substances 0.000 description 7
- -1 polypropylene Polymers 0.000 description 7
- 229920001155 polypropylene Polymers 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Sliding-Contact Bearings (AREA)
- Lubricants (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses an anti-attrition lubricating coating for a squeezing granulator bearing bush and a preparation method thereof, belonging to the field of squeezing granulator bearing bushes. The anti-attrition lubricating coating is of a double-layer structure, wherein an adhesive bottom layer is a Ni-based alloy coating, a working face layer is an Ag coating, and the working face layer is prepared through an atmospheric pressure plasma spray technique; the process parameters are as follows: the current is 400-480A, the pressure is 55-75V, the powder feeding rate is 20-40g/min, the powder feeding gas flow is 4-8L/min, the primary gas flow is 42-47L/min, secondary gas flow is 4.0-8.0L/min, the primary pressure is 65-80psi, the secondary pressure is 55-65psi, and the spray distance is 60-90mm. By virtue of the anti-attrition lubricating coating for the squeezing granulator bearing bush, the bearing bush burntout is prevented, severe wear of a bearing is avoided effectively, the bottleneck problem in high-load stable and safe production of a polymerization plant can be solved, and important industrial application value is achieved.
Description
Technical field
The present invention relates to Squeezinggranulator bearing shell field, specially a kind of Squeezinggranulator bearing shell with anti-attrition lubricant coating and
Its preparation method.
Background technology
Extruder grain unit is one of great critical equipment in large-scale polypropylene complete set of equipments, is collection machinery, electric, instrument
, in one, the key equipment of the higher polypropylene plant post processing of automaticity, can it even running relation for table and chemical industry
" peace, steady, long, full, excellent " can be realized to device run, the clean manufacturing to device and economic benefit can produce great shadow
Ring.And bearing shell is the critical component of extruder grain unit, when Squeezinggranulator runs, if bearing shell and between centers insufficient lubrication, axle
Watt there is direct friction and rotating shaft between, axle can produce heavy wear, and occur the high temperature that direct friction produces to be enough to will
It burns out, i.e. tile kilning, has a strong impact on polyacrylic high load capacity and stablizes safe and continuous production.Bearing shell surface adopts anti-attrition lubricant coating
It is a kind of effective way avoiding Squeezinggranulator tile kilning, axle and bearing shell heavy wear, for the production improving polypropylene plant
Ability, has important industrial application value, has important meaning for country's adjustment polypropylene product structure, reduction energy consumption
Justice.
Content of the invention
It is an object of the invention to provide Squeezinggranulator bearing shell anti-attrition lubricant coating and its system of a kind of function admirable
Preparation Method, to avoid the heavy wear problem of Squeezinggranulator tile kilning, axle, is stably kept the safety in production with solving polyplant high load capacity
Bottleneck problem.
Technical scheme is as follows：
A kind of Squeezinggranulator bearing shell anti-attrition lubricant coating, this anti-attrition lubricant coating is by being in turn attached to bearing shell surface
Bond coating and working surface layers composition, wherein：The material of described bearing shell is steel, and described bond coating is Ni based alloy coating,
Described working surface layers are Ag film.
Described bond coating thickness is 0.10-0.20mm, and working surface layers thickness is 1.5-2.0mm, and machine adds rear anti-attrition lubrication
Coating layer thickness（Coating uses thickness）For 0.6-0.8mm.
Described anti-attrition lubricant coating average bonding strength is not less than 15MPa, described anti-attrition its working surface layers of lubricant coating
Porosity is 1%-3%.
The above-mentioned Squeezinggranulator bearing shell preparation method of anti-attrition lubricant coating, the method first passes through plasma spraying work
Skill prepares Ni based alloy coating on bearing shell surface, then adopts atmospheric plasma spray technology to prepare in Ni based alloy coating surface
Working surface layers；Described atmospheric plasma spray technical matters parameter is：Electric current 400-480A, voltage 55-75V, powder sending quantity 20-
40g/min, powder feeding throughput 4-8L/min, primary air amount 42-47L/min, secondary throughput 4.0-8.0L/min, main atmospheric pressure
65-80psi, secondary atmospheric pressure 55-65psi, spray distance 60-90mm.Described working surface layers adopt Ag powder to prepare, Ag powder grain
Spend for 45-100 μm, Ag powder purity is more than 98.5wt%.
The invention has the beneficial effects as follows：
1st, the present invention is processed to polypropylene Squeezinggranulator bearing shell by atmospheric plasma spray technology, obtains bearing shell
Anti-attrition lubricant coating, it is therefore prevented that the tile kilning situation of Squeezinggranulator, efficiently avoid the heavy wear of axle, solves polymerization dress
Put the bottleneck problem that high load capacity is stably kept the safety in production, improve the production capacity of polypropylene plant, there is important commercial Application
It is worth, significant for country's adjustment polypropylene product structure, reduction energy consumption.
2nd, the bond strength of bearing shell anti-attrition lubricant coating and porosity are the keys that can this coating obtain practical application, if
Anchoring strength of coating is low, and under high load operation environment, coating easily falls block, the safety that impact complexes run well and
Stability, if coating porosity is excessive, can have a strong impact on the anti-attrition greasy property of coating, and coating can not play the work of anti-attrition lubrication
With.And in coating preparation, the granularity of raw material, preparation technology of coating parameter and coating significantly affect painting using thickness selection etc.
The bond strength of layer and porosity, and several factor is mutual restriction, only selects appropriate, coupling, coating performance ability
Meet use requirement, as too small in starting material particle size, in coating preparation process, scaling loss is serious, if starting material particle size is excessive, granule melts
Change insufficient, coating porosity improves.
Brief description
Fig. 1 is the metallograph of the anti-attrition lubricant coating of preparation in embodiment 1.
Fig. 2 is the metallograph of the anti-attrition lubricant coating of preparation in embodiment 2.
Fig. 3 is the metallograph of the anti-attrition lubricant coating of preparation in comparative example 1.
Fig. 4 is the metallograph of the anti-attrition lubricant coating of preparation in comparative example 2.
Specific embodiment
Squeezinggranulator bearing shell of the present invention is specific as follows with anti-attrition lubricant coating preparation method：
Step 1：First pass through Conventional plasma spraying coating process and prepare Ni based alloy coating on bearing shell (No. 20 steel) surface, so
Adopt atmospheric plasma spray technology afterwards in Ni based alloy coating surface preparation work surface layer, working surface layers preparation technology such as table 1
Shown.
Step 2：Anti-attrition lubricant coating using the preparation of lathe process step 1.
Step 3：Porosity measurement is carried out to the anti-attrition lubricant coating after step 2 processing using Metallographic Analysis system.
Step 4：Strength test is combined to the anti-attrition lubricant coating after step 2 processing using cupping machine.
Table 1 anti-attrition lubricant coating working surface layers preparation technology
The technique preparing Ni based alloy coating on bearing shell surface in following embodiment is specially：Electric current 520A, voltage
60V, powder sending quantity 30g/min, powder feeding throughput 6L/min, primary air amount 47L/min, main atmospheric pressure 70psi, secondary throughput 7L/
Min, secondary atmospheric pressure 58psi, spray distance 125mm.
Embodiment 1：
In the present embodiment, Squeezinggranulator bearing shell is specific as follows with the preparation method of anti-attrition lubricant coating：
Step 1：Anti-attrition lubricant coating is prepared using atmospheric plasma spray technology, bond coating adopts Ni base alloy powder
Preparation, working surface layers adopt Ag powder to prepare, and Ag powder purity is 99.0wt%, and granularity is 45-100 μm.Working surface layers prepare work
Skill is as shown in table 2.
Table 2 anti-attrition lubricant coating working surface layers preparation technology
Step 2：Step 1 its bond coating thickness of gained anti-attrition lubricant coating is 0.15mm, and working surface layers thickness is
1.5mm, using the anti-attrition lubricant coating of lathe process step 1 preparation, after processing, anti-attrition lubricant coating thickness is 0.75mm.
Step 3：Porosity survey is carried out to the anti-attrition lubricant coating working surface layers after step 2 processing using Metallographic Analysis system
Fixed, coating porosity is 2.0%.
Step 4：Strength test, coating are combined to the anti-attrition lubricant coating after step 2 processing using cupping machine
Average bonding strength is 17.2MPa.
Embodiment 2：
In the present embodiment, Squeezinggranulator bearing shell is specific as follows with the preparation method of anti-attrition lubricant coating：
Step 1：Anti-attrition lubricant coating is prepared using atmospheric plasma spray technology, bond coating adopts Ni base alloy powder
Preparation, working surface layers adopt Ag powder to prepare, and Ag powder purity is 99.0wt%, and granularity is 45-100 μm.Working surface layers prepare work
Skill is as shown in table 3.
Table 3 anti-attrition lubricant coating working surface layers preparation technology
Step 2：Step 1 its bond coating thickness of gained anti-attrition lubricant coating is 0.15mm, and working surface layers thickness is
1.8mm, using the anti-attrition lubricant coating of lathe process step 1 preparation, after processing, anti-attrition lubricant coating thickness is 0.70mm.
Step 3：Porosity measurement, coating holes are carried out to anti-attrition lubricant coating prepared by step 1 using Metallographic Analysis system
Gap rate is 1.9%.
Step 4：Strength test, coating are combined to the anti-attrition lubricant coating after step 2 processing using cupping machine
Average bonding strength is 16.8MPa.
Comparative example 1：
In the present embodiment, Squeezinggranulator bearing shell is specific as follows with the preparation method of anti-attrition lubricant coating：
Step 1：Anti-attrition lubricant coating is prepared using atmospheric plasma spray technology, bond coating adopts Ni base alloy powder
Preparation, working surface layers adopt Ag powder to prepare, and Ag powder purity is 99.0wt%, and granularity is 74-125 μm.Working surface layers prepare work
Skill is as shown in table 4.
Table 4 anti-attrition lubricant coating working surface layers preparation technology
Step 2：Step 1 its bond coating thickness of gained anti-attrition lubricant coating is 0.15mm, and working surface layers thickness is
1.5mm, using the anti-attrition lubricant coating of lathe process step 1 preparation, after processing, anti-attrition lubricant coating thickness is 0.75mm.
Step 3：Porosity survey is carried out to the anti-attrition lubricant coating working surface layers after step 2 processing using Metallographic Analysis system
Fixed, coating porosity is 9.2%.
Step 4：Strength test, coating are combined to the anti-attrition lubricant coating after step 2 processing using cupping machine
Average bonding strength is 11.5MPa.
Comparative example 2：
In the present embodiment, Squeezinggranulator bearing shell is specific as follows with the preparation method of anti-attrition lubricant coating：
Step 1：Anti-attrition lubricant coating is prepared using atmospheric plasma spray technology, bond coating adopts Ni base alloy powder
Preparation, working surface layers adopt Ag powder to prepare, and Ag powder purity is 99.0wt%, and granularity is 45-100 μm.Working surface layers prepare work
Skill is as shown in table 5.
Table 5 anti-attrition lubricant coating working surface layers preparation technology
Step 2：Step 1 its bond coating thickness of gained anti-attrition lubricant coating is 0.15mm, and working surface layers thickness is
1.8mm, using the anti-attrition lubricant coating of lathe process step 1 preparation, after processing, anti-attrition lubricant coating thickness is 0.70mm.
Step 3：Porosity measurement, coating holes are carried out to anti-attrition lubricant coating prepared by step 1 using Metallographic Analysis system
Gap rate is 8.7%.
Step 4：Strength test, coating are combined to the anti-attrition lubricant coating after step 2 processing using cupping machine
Average bonding strength is 10.8MPa.
Claims (6)
1. a kind of Squeezinggranulator bearing shell with the preparation method of anti-attrition lubricant coating it is characterised in that：Described anti-attrition lubricant coating
It is made up of the bond coating and working surface layers being in turn attached to bearing shell surface, wherein：The material of described bearing shell is steel, described viscous
Knot bottom is Ni based alloy coating, and described working surface layers are Ag coating；
The preparation method of described anti-attrition lubricant coating is：First pass through plasma spray coating process and prepare Ni based alloy on bearing shell surface
Coating, then adopts atmospheric plasma spray technology in Ni based alloy coating surface preparation work surface layer；Described atmospheric plasma
Spraying technology technological parameter is：Electric current 400-480A, voltage 55-75V, powder sending quantity 20-40g/min, powder feeding throughput 4-8L/
Min, primary air amount 42-47L/min, secondary throughput 4.0-8.0L/min, main atmospheric pressure 65-80psi, secondary atmospheric pressure 55-
65psi, spray distance 60-90mm.
2. according to the Squeezinggranulator bearing shell described in claim 1 with the preparation method of anti-attrition lubricant coating it is characterised in that：Institute
Stating bond coating thickness is 0.10-0.20mm, and working surface layers thickness is 1.5-2.0mm, and machine adds rear anti-attrition lubricant coating thickness and is
0.6-0.8mm.
3. according to the Squeezinggranulator bearing shell described in claim 1 with the preparation method of anti-attrition lubricant coating it is characterised in that：Institute
State anti-attrition lubricant coating average bonding strength and be not less than 15MPa.
4. according to the Squeezinggranulator bearing shell described in claim 1 with the preparation method of anti-attrition lubricant coating it is characterised in that：Institute
The porosity stating anti-attrition its working surface layers of lubricant coating is less than 3%.
5. according to the Squeezinggranulator bearing shell described in claim 1 with the preparation method of anti-attrition lubricant coating it is characterised in that：Institute
Stating working surface layers adopts Ag powder to prepare, and granularity is 45-100 μm.
6. according to the Squeezinggranulator bearing shell described in claim 5 with the preparation method of anti-attrition lubricant coating it is characterised in that：Ag
Powder purity is more than 98.5wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310441210.XA CN104451513B (en) | 2013-09-25 | 2013-09-25 | Anti-attrition lubricating coating for squeezing granulator bearing bush and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310441210.XA CN104451513B (en) | 2013-09-25 | 2013-09-25 | Anti-attrition lubricating coating for squeezing granulator bearing bush and preparation method thereof |
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| Publication Number | Publication Date |
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| CN104451513A CN104451513A (en) | 2015-03-25 |
| CN104451513B true CN104451513B (en) | 2017-02-08 |
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| CN201310441210.XA Active CN104451513B (en) | 2013-09-25 | 2013-09-25 | Anti-attrition lubricating coating for squeezing granulator bearing bush and preparation method thereof |
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| CN114713653A (en) * | 2022-03-24 | 2022-07-08 | 上海工程技术大学 | Machining method and forming die assembly for long rod part with threaded teeth for vehicle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB476042A (en) * | 1936-03-27 | 1937-11-29 | Albert Henry Stuart | Improvements in and relating to coating compositions and the coating of surfaces |
| CN103089479A (en) * | 2013-01-21 | 2013-05-08 | 南京理工大学 | Wear-resisting piston ring with hard-soft composite coating and textured surface and wear-resisting piston ring manufacture method |
| CN103273696A (en) * | 2013-05-22 | 2013-09-04 | 安徽工程大学 | Anti-friction wear-resistant coating and preparation process thereof |
-
2013
- 2013-09-25 CN CN201310441210.XA patent/CN104451513B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB476042A (en) * | 1936-03-27 | 1937-11-29 | Albert Henry Stuart | Improvements in and relating to coating compositions and the coating of surfaces |
| CN103089479A (en) * | 2013-01-21 | 2013-05-08 | 南京理工大学 | Wear-resisting piston ring with hard-soft composite coating and textured surface and wear-resisting piston ring manufacture method |
| CN103273696A (en) * | 2013-05-22 | 2013-09-04 | 安徽工程大学 | Anti-friction wear-resistant coating and preparation process thereof |
Non-Patent Citations (1)
| Title |
|---|
| "铅锡合金镀层的润滑减摩性能研究";卢建红等;《材料保护》;20070930;第40卷(第9期);第12-13，41页 * |
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