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《ma對(duì)fecu系金屬結(jié)合劑結(jié)構(gòu)和燒結(jié)性能的影響》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、摘要本文主要研究了Fe．Cu復(fù)合粉體在高能球磨過(guò)程中能量的儲(chǔ)存以及變化情況對(duì)金屬結(jié)合劑燒緡陛能的影響。通過(guò)對(duì)Fe—Cu復(fù)合粉體進(jìn)行XRD、DSC、掃描電鏡、面分布和燒結(jié)性能的分析來(lái)了解在球磨過(guò)程中的能量?jī)?chǔ)存方式和變化情況，從而證明了這種儲(chǔ)能對(duì)金屬結(jié)合劑的燒結(jié)溫度和性能的影響。實(shí)驗(yàn)結(jié)果表明，隨著球磨加工的進(jìn)行，粉體的顆粒和晶粒尺寸減小，晶格常數(shù)變大。由于晶粒尺寸的減小和品格常數(shù)的變大，使得表面能和界面能增加并產(chǎn)生了大量的缺陷和位錯(cuò)。DSC和掃描電鏡以及面分布分析的結(jié)果表明上述變化是其儲(chǔ)存能量的主要來(lái)源。這些儲(chǔ)存的能量在燒結(jié)過(guò)程中使燒結(jié)溫度大幅度下降。在Fe—Cu二元系中加入金屬sn
2、及663青銅和SiC球磨后，試樣的燒結(jié)性能隨球磨時(shí)間的延長(zhǎng)而提高，其抗折強(qiáng)度在球磨過(guò)程中有一個(gè)最小值；將球磨一定時(shí)間的663青銅和SiC添加劑加入到球磨后的Fe45Cu45Snl0中，其加入量應(yīng)當(dāng)適宜，此時(shí)燒結(jié)體的各項(xiàng)性能(如抗折強(qiáng)度、燒結(jié)密度、硬度)都達(dá)到最高值。這對(duì)金屬基余剛石丁具的生產(chǎn)有著實(shí)際的指導(dǎo)意義。實(shí)驗(yàn)證明，粉末經(jīng)球磨后可以在達(dá)到金剛石工具所要求的性能的條件下大大降低燒結(jié)溫度，從而減少會(huì)剛石的損壞，進(jìn)而提高金剛石工具的質(zhì)量和加工效率，延長(zhǎng)金剛石工具的使用壽命和效率。關(guān)鍵詞機(jī)械合金化復(fù)合粉體Fe—Cu金屬結(jié)合劑儲(chǔ)能高能球磨燒結(jié)體金剛石工具苧當(dāng)盔!!!：蘭竺圭篁蘭Abst
3、ractTheenergieshowtobestoredandchangedofFe-Cucompotmdpowdersduringhigh—energyball·rmillingeffectonsintercapabilitiesofmetalbondweremailflydiscussedinthisarticle．Inordertofindoutwaysofstoredandchangeofenergyduringmilling，XRD，DSC，SEM，EDSandsintercapabilitieswereusedtOanalyzethemilledFe—Cucompou
4、ndpowders，whichaffectedthesintertemperatureofmetalbondandcapabilityofproducts．Theresultsofexperimentshowedthatcrystallineandgrainsizesofthecompoundpowderswerediminishedgraduallyandcrystallinelatticeparameterswereincreasedgraduallywithmilling．Agreatdealofimperfectionsanddefectswereproducedandd
5、iminishingcrystallinesizesandincreasingcrystallinelatticeparameterincreasedsurfaceenergiesandinterfaceenergies，TheresultsofDSC、SEMandEDSshowedthatthemainresourcesofstoredenergieswerefromthischanges．ThesintertemperatureWaSgreatlydecreasedcourseofsinterbythesestoredenergies+ThemetalSn，663bronze
6、andSiCaftermillingwereaddedtoFe—Cusystem．Thesintercapabilitiesofsamplewerepromotedwithcontinuemillingtime．The663bronzeandSiCadditivewereaddedtoFe45Cu45Snl0thatwasmilled，theadditiveshouldhemilledsometimeanditsquantityshouldbeappropriated．Inthistime．thekindsofthecapabilitieswereallreachedmaxima
7、l．itwasinstructionalsignificancetoproducemetalintegrateagentdiamondtools．Theexperimentshowedthatthesintertemperatureandthedamnificationofdiamondweregreatlycomedownanddiminishedinconditionofsatisfyingcapabilitiesofdiamondtoolsbymilling．Thequal
