冷风切削对高速切削难加工材料刀具磨损的影响

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1、第30卷
第5期摩擦学学报Vo.l30
No.52010年9月TribologySept,2010冷风切削对高速切削难加工材料刀具磨损的影响1*22苏
宇,何
宁,李
亮(1.江苏科技大学机械工程学院,江苏镇江
212003;
2.南京航空航天大学机电学院,江苏南京
210016)摘
要:基于复合制冷技术研制1种低温冷风/低温最小量润滑供给装置,使用TiAlN涂层硬质合金刀具进行干切削、最小量润滑(MQL)、低温冷风及低温最小量润滑(低温MQL)条件下镍基高温合金Inconel718的高速车削试验和淬硬钢AISID2的高速铣削试验,

2、通过扫描电镜(SEM)和能谱分析(EDS)观察分析硬质合金刀具的磨损形态、磨损机理,研究低温冷风和低温MQL对高速切削难加工材料刀具磨损的影响.结果表明:高速切削Inconel718和AISID2时,刀具磨损机理主要为磨料磨损、黏结磨损和扩散磨损;低温冷风和低温MQL可有效降低高速切削时的切削温度,进而防止刀具软化,减小磨料磨损和与温度相关的黏结磨损、扩散磨损,因而可大幅度地提高刀具的使用寿命.关键词:低温冷风;低温最小量润滑;难加工材料;高速切削;磨损中图分类号:TG506文献标志码:A文章编号:1004-0595(2010)05

3、-0485-06EffectofRefrigeratedAirCuttingonToolwearinHigh-speedCuttingofDifficult-to-cutMaterials1*22SUYu,HENing,LILiang(1.CollegeofMechanicalEngineering,JiangsuUniversityofScienceandTechnology,Zhenjiang212003,China2.CollegeofMechanicalandElectricalEngineering,NanjingUniv

4、ersityofAeronauticsandAstronautics,Nanjing210016,China)Abstract:Arefrigeratedair/cryogenicminimumquantitylubricationgeneratorwasdevelopedbasedonacompositerefrigerationmethod.TiAlNcoatedcarbidetoolwasusedinhigh-speedturningofInconel718nickel-basesuperalloyandhigh-speedm

5、illingofAISID2hardenedstee.lExperimentswereconductedunderdifferentcooling/lubricationconditions,.ie.drycutting,minimumquantitylubrication(MQL),refrigeratedair,andcryogenicminimumquantitylubrication(cryogenicMQL).SEMandEDSwereusedtoanalyzewearmorphologiesandmechanismofc

6、ementedcarbidetools.ThuseffectofrefrigeratedairandcryogenicMQLontoolwearwasinvestigatedinhigh-speedcuttingofdifficult-to-cutmaterials.Theresultsshowedthatthemaintoolwearmechanismwasabrasivewear,adhesivewearanddiffusionwearinhigh-speedcuttingofdifficult-to-cutmaterials.

7、ApplicationofrefrigeratedairandcryogenicMQLinthehigh-speedcuttingofdifficult-to-cutmaterialsreducedthecuttingtemperatureeffectively,whichavoidedtheintenerateofcuttingtools,andreducedabrasivewearandthermallyrelatedwearsuchasadhesivewearanddiffusionwear.Therefore,refrige

8、ratedairandcryogenicMQLenhancedtoolliferemarkably.Keywords:refrigeratedair,cryogenicminimumquantitylubrication,diffic