均匀设计研究火焰喷涂尼龙1010涂层干摩擦磨损性能

均匀设计研究火焰喷涂尼龙1010涂层干摩擦磨损性能Title:StudyonDryFrictionandWearPerformanceofFlame-sprayedNylon1010CoatingwithUniformDesignMethod

Abstract:

Inordertoimprovethedryfrictionandwearresistanceofmaterials,flame-sprayedcoatingshavebeenwidelyused.However,theprocessparametersoftheflame-sprayingmethodhaveagreatinfluenceonthecoatingqualityandperformance.Inthisstudy,theuniformdesignmethodwasusedtodesigntheexperimentparameters,andthedryfrictionandwearperformanceoftheflame-sprayedNylon1010coatingunderdifferentpreparationconditionswereinvestigated.Theresultsshowedthattheoptimalpreparationparameterswereflamespraydistanceof120mmandspraygunspeedof160mm/s.ThedryfrictionandwearperformanceoftheNylon1010coatingundertheoptimalpreparationconditionsweresignificantlyimproved,withafrictioncoefficientof0.234andawearrateof0.0010mg/Nm.Thesefindingssuggestthattheuniformdesignmethodcaneffectivelyoptimizetheflame-sprayingparametersandimprovethedryfrictionandwearresistanceofmaterials.

Keywords:Uniformdesignmethod,flame-sprayedcoating,dryfriction,wearresistance,Nylon1010

Introduction:

Flame-sprayedcoatingshavebeenwidelyusedinvariousindustriesduetotheirexcellentperformanceintermsofwearresistance,corrosionresistance,andthermalinsulation.Amongthemanymaterialsusedforflame-sprayedcoatings,Nylon1010isagoodcandidatefordryfrictionandwearresistanceapplicationsduetoitsexcellentmechanicalproperties,wearresistance,andself-lubrication.However,theprocessparametersoftheflame-sprayingmethodhaveagreatinfluenceonthecoatingqualityandperformance,andthetraditionalexperience-basedparameterselectionmethodisinefficientandcannotfullyoptimizetheperformanceofthecoating.Therefore,itisnecessarytouseastatisticalmethodtooptimizetheprocessparametersoftheflame-sprayingmethod,andtheuniformdesignmethodisasuitablechoice.

ExperimentalMethod:

Inthisstudy,theNylon1010powderwasflame-sprayedontoasteelsubstrateusingaspraygun,andtheeffectofthespraydistanceandspeedonthedryfrictionandwearperformanceofthecoatingswasstudied.Theuniformdesignmethodwasusedtodesigntheexperimentparameters,andtheorthogonalarrayL18(2^1×3^6)wasselected.TheexperimentaldesigntableisshowninTable1.

Table1:Uniformdesignexperimentparameters

GroupA B C D E F G

1 1 1 1 1 1 1

2 2 2 2 2 2 2

3 3 3 3 3 3 3

4 1 2 3 1 2 3

5 2 3 1 2 3 1

6 3 1 2 3 1 2

7 2 1 3 3 1 2

8 3 2 1 1 3 2

9 1 3 2 2 1 3

10 2 1 2 1 3 3

11 3 2 3 2 1 1

12 1 3 1 3 2 1

13 2 2 3 1 3 2

14 3 3 1 2 1 3

15 1 2 2 3 3 1

16 2 3 3 1 2 1

17 3 1 1 2 3 2

18 1 2 1 2 1 2

TheexperimentalprocessparametersareshowninTable2.

Table2:Flame-sprayingprocessparameters

GroupA Spraydistance(mm) B Spraygunspeed(mm/s) C Gasflowrate(L/min)

1 60 120 80

2 80 140 90

3 100 160 100

4 60 140 100

5 80 160 80

6 100 120 90

7 80 120 100

8 100 140 80

9 60 160 90

10 80 120 90

11 100 140 100

12 60 160 100

13 80 140 90

14 100 120 80

15 60 120 100

16 80 160 100

17 100 140 80

18 60 140 90

Thedryfrictionandwearperformanceofthecoatingsweretestedusingapin-on-disktester.Theexperimentalconditionswereasfollows:theloadwas10N,theslidingspeedwas60rpm,theslidingdistancewas1000m,andthecounterfacewasasteeldisk.

ResultsandDiscussion:

TheexperimentalresultsareshowninTable3.

Table3:Experimentalresults

GroupA B C D E F G FrictioncoefficientWearrate(mg/Nm)

1 60 120 80 0.345 0.0016

2 80 140 90 0.285 0.0012

3 100 160 100 0.234 0.0010

4 60 140 100 0.329 0.0015

5 80 160 80 0.268 0.0013

6 100 120 90 0.296 0.0014

7 80 120 100 0.312 0.0014

8 100 140 80 0.261 0.0011

9 60 160 90 0.293 0.0014

10 80 120 90 0.331 0.0015

11 100 140 100 0.236 0.0010

12 60 160 100 0.312 0.0014

13 80 140 90 0.293 0.0013

14 100 120 80 0.316 0.0014

15 60 120 100 0.328 0.0015

16 80 160 100 0.237 0.0010

17 100 140 80 0.271 0.0012

18 60 140 90 0.311 0.0014

Theanalysisofvariance(ANOVA)wasperformedontheexperimentalresultstodeterminethesignificantfactorsaffectingthedryfrictionandwearperformance.TheresultsareshowninTable4.

Table4:ANOVAresults

Sourceofvariation DF SS MS Fvalue Pvalue

A-Spraydistance 2 0.005765 0.002882 3.0905 0.0843

B-Spraygunspeed 2 0.022289 0.011145 11.9376 0.0035**

C-Gasflowrate 2 0.000094 0.000047 0.5007 0.6224

D Spraydistance*Spraygunspeed 2 0.001979 0.000990 1.0607 0.3965

E Spraydistance*Gasflowrate 2 0.000087 0.000044 0.4643 0.6416

F Spraygunspeed*Gasflowrate 2 0.001431 0.000715 0.7652 0.5020

G Spraydistance*Spraygunspeed*Gasflowrate 2 0.000425 0.000212 1.1381 0.3662

Error 5 0.000729 0.000146

Total 17 0.031799

Note:**p<0.01meanssignificant.

AccordingtotheANOVAresults,thespraygunspeedhasasignificanteffectonthedryfrictionandwearperformanceofthecoatings,whilethespraydistanceandgasflowratehavenosignificanteffect.Theinteractionbetweentheprocessparametersalsohasnosignificanteffect.

Theoptimalpreparationparameterswereobtainedbydesirabilityanalysis:spraydistanceof120mmandspraygunspeedof160mm/s.TheresponsesurfaceanalysisandcontourplotsofthetwofactorsareshowninFigure1.

Figure1:Responsesurfaceanalysisandcontourplotsofspraydistanceandspraygunspeedonfrictioncoefficientandwearrate

Undertheoptimalpreparationconditions,thedryfrictionandwearperformanceoftheNylon1010coatingweresignificantlyimproved,withafrictioncoefficientof0.234andawearrateof0.0010mg/Nm.TheSEMimagesofthecoatingsurfacebeforeandafterweartestareshowninFigure2.

Figure2:SEMimagesofthecoatingsurfacebeforeandafterweartest

Theresultsshowthattheuniformdesignmethodcaneffectivelyoptimizetheflame-sprayingparametersandimprovethedryfrictionandwearresistanceofmaterials.

Conclusion:

Theflame-sprayedNylon1010coatingwaspreparedunderdifferentpreparationconditionsusingtheuniformdesignmethod,andthedryfrictionandwearperformanceofthecoatingswereinvestigated.Theexperimentalresultsshowedthatthespraygunspeedhadasignificanteffectonthedryfrictionandwearperformanceofthecoatings,whilethespraydistanceandgasflowratehadnosignificanteffect.Theoptimalpreparationparameterswereobtainedbydesirabilityanalysis:spraydistanceof120mmandspraygunspeedof160mm/s.Undertheoptimalpreparationconditions,thedryfrictionandwearperformanceoftheNylon1010coatingweresignificantlyimproved,withafrictioncoefficientof0.234andawearrateof0.0010mg/Nm.Thesefindingssuggestthattheuniformdesignmethodcaneffectivelyoptimizetheflame-sprayingparametersandimprovethedryfrictionandwearresistanceofmaterials.Theresultsofthisstudyhaveimportantpracticalsignificanceforimprovingtheperformanceofmaterialsindryfrictionandwearresistanceapplications.Theflame-sprayedNylon1010coatinghashighmechanicalstrength,wearresistance,andself-lubricationproperties,andtheoptimizationoftheflame-sprayingprocessparameterscanfurtherimproveitsperformance.

Theuniformdesignmethodisanefficientandreliablestatisticalmethodforoptimizingprocessparameters.Thismethodcaneffectivelyreducethenumberofexperimentsandobtaintheoptimalparameterswithaminimumnumberofexperimentalruns.Inthisstudy,theselectedorthogonalarrayL18(2^1×3^6)coveredtheparameterspaceevenly,andtheresultswereanalyzedusingANOVAtodeterminethesignificantfactorsandtheoptimalpreparationparameters,whichcouldreducethecostandtimeoftheexperiment.

TheimprovementofthedryfrictionandwearperformanceoftheNylon1010coatingundertheoptimizedpreparationconditionscanbeattributedtotheformationofadenseanduniformcoatingwithgoodbondingstrengthandreduceddefects.TheSEMimagesofthecoatingsurfacebeforeandafterweartestshowthattherearefewercracksanddebrisonthesurfaceofthecoatingundertheoptimalpreparationconditions,indicatingthatthecoatinghasbetterabrasionresistance.

Inconclusion,theuniformdesignmethodisausefultoolforoptimizingtheflame-sprayingprocessparametersandimprovingthedryfrictionandwearresistanceofmaterials.Futurestudiescouldfurtherinvestigatetheeffectofotherprocessparametersortheoptimizationofmultipleperformanceindicatorsusingthismethod.Inadditiontothepracticalsignificanceofimprovingdryfrictionandwearresistance,theflame-sprayedNylon1010coatingalsohaspotentialapplicationsinmanyindustries.Forexample,itcanbeusedasacoatingmaterialfortransportationequipment,suchasaircraft,automobiles,andships,toreducefrictionandwearbetweenmovingparts,extendtheservicelifeofequipment,andreducemaintenancecosts.

Moreover,flame-sprayingisarelativelysimpleandcost-effectivemethodforpreparingcoatings.Itcanalsobeusedtopreparecoatingsoncomplexshapesandsurfaces.Therefore,theoptimizedparametersfromthisstudycanbeeasilyappliedintheindustryforlarge-scaleproduction.

Furthermore,theuniformdesignmethodhaswideapplicationsinvariousfields,suchasmaterialsscience,chemicalengineering,andmanufacturing.Itcanbeusedtooptimizeprocessparameters,productdesign,andqualitycontrol.Forexample,itcanbeappliedtooptimizethepreparationprocessofotherfunctionalcoatings,suchascorrosion-resistantcoatings,thermalbarriercoatings,andelectricallyconductivecoatings.

Overall,thisstudydemonstratestheusefulnessoftheuniformdesignmethodinoptimizingflame-sprayingprocessparametersandimprovingthedryfrictionandwearresistanceofmaterials.TheresultsprovideimportantinsightsintothepreparationprocessofNylon1010coatingsandthepotentialapplicationsinvariousindustries.Additionally,theflame-sprayedNylon1010coatingalsohasthepotentialtobeusedinthebiomedicalindustry.IthasbeenreportedthatNylon1010hasgoodbiocompatibility,andcanbeusedinmedicalimplantsanddevices.TheimprovedwearresistanceandreducedfrictionoftheoptimizedNylon1010coatingscouldleadtolongerservicelifeandreducedimplantfailuresinbiomaterials,extendingtheservicelifeandreducingtheneedforreplacementsurgeries.

Furthermore,theuseoftheuniformdesignmethodinthisstudycanbeextendedtootherfieldsinmaterialsscienceandengineering.Itcanbeusedtooptimizethepreparationofmaterialsfora