Ti-6Al-4V合金的陶瓷湿喷丸表面强化工艺.pdf

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1、Availableonlineat、『v、^n^，．sciencedirect．com一IYansactionsof姆ScienceDirectNonferrousMetaisSocietyofChinaELslⅣIERPressTrans．Nonfe~ousMet．Soc．China24(2014)690—696wwW．tnmsc．cnEffectofwetshotpeeningonTi一6A1—4ValloytreatedbyceramicbeadsGuo．qingCHEN，YanJIAO，Tang．yongTIAN，Xin．huaZHANG，Z

2、hi—qiangLI，Wen．1ongZHOU1．SchoolofMaterialsScienceandEngineering，DalianUniversityofTechnology,Dalian116085，China；2．BeijingAeronauticalManufacturingTechnologyResearchInstitute，Beijing100024，ChinaReceived5March2013；accepted5July2013Abstract：Ti-6A1-4Valloywasprocessedbywetshotpeeni

3、ngwithceramicbeads．Theeffectsoftheshotpeenedintensityonthemicrostructure．surfacemorphology,andresidualstresswereinvestigated．Atensile-tensilefatiguetestwasperformedandthefracturemechanismwasproposed．Theresultsdemonstratethatthesurfaceroughnessafterwetshotpeeningisobviouslylower

4、thanthatafterdryshotpeening．Withtheincreaseoftheshotpeenedintensithedepthoftheresidualstress1ayerincreasesto250gna．andthemaximumstressinthislayerincreasesto-895MPa．Thefatiguestrengthalsoincreasesbv12．4％becauseofthewetshotpeeningtreatment．Thedislocationdensityofthesurfacelayeris

5、significantlyenhancedafterthewetshotpeeningwithceramicbeads．Themicrostructureofthesurfacelayerisobviouslyrefinedintoultra．finegrains．Keywords：Ti-6A1-4Valloy；wetshotpeening；microstructure；residualstress；fatiguepropertyensurestheuseofceramicbeadsplacedinliquids1Introductioncontai

6、ningacertainamountofcorrosioninhibitors．Aliquidfilmisformedonthecomponentsurface，whichTitaniumandtitaniumalloysarewidelyusedintheefectivelyreducesfrictionandcoolsthesurface．aerospaceandmarineindustriesbecauseoftheirCeramicbeadsarewidelyconsideredtobeconducivetoexcellentproperti

7、es，suchashighspecificstrength，energyconservationandenvironmentalprotectionstabilityatmid—temperature，non—magnetism，andbecauseoftheirhighintensity,toughness，hardness，goodexcellentcorrosionresistance．However,thefiarthersurfacefinish，andhighproductivity．SAKODAanddevelopmentoftitan

8、iumalloysislimitedbytheirlowTOSHA[11]reportedthatthefa