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《鑄造碳化鎢鎳基釬料合金復(fù)合釬涂材料制備與性能研究》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。
1、摘要近些年來,抗磨料磨損顆粒強(qiáng)化復(fù)合材料的研發(fā)是復(fù)合材料領(lǐng)域的一個(gè)重要方向。隨著現(xiàn)代工業(yè)不斷的進(jìn)步和發(fā)展,人們對(duì)抗磨料磨損材料的需求量越來越大,同時(shí)對(duì)耐磨材料的性能也提出了新的要求。因此,開發(fā)新型金屬基耐磨材料顯得尤為重要。本論文借助于釬涂原理,以鑄造碳化鎢顆粒為顆粒增強(qiáng)相材料,以鎳基釬料Ni82CrSiB合金為基體材料,用真空熔鑄法和真空熱壓法制備新型耐磨釬涂復(fù)合材料。試驗(yàn)結(jié)果表明:熔鑄試樣鑄造碳化鎢顆粒分布均勻、冶金結(jié)合良好,致密度高達(dá)93%。以不同磨粒的SiC為磨料,在不同載荷條件下利用銷一盤磨損試驗(yàn)機(jī)測(cè)試
2、了鑄造碳化鎢/Ni82CrSiB復(fù)合釬涂材料的二體磨料磨損性能。磨損試驗(yàn)結(jié)果表明:鑄造碳化鎢顆粒增強(qiáng)Ni82CrSiB合金復(fù)合材料具有優(yōu)良的抗磨料磨損能力,耐磨性可達(dá)到高鉻鑄鐵的6~10倍。此外,利用XRD、SEM、HRS一150數(shù)碼洛氏硬度計(jì)、71型顯微硬度儀等手段系統(tǒng)地研究了鑄造碳化鎢/Ni82CrSiB復(fù)合材料的形貌、組織、硬度等性能。對(duì)于熱壓試樣的不致密化現(xiàn)象,給予了分析和解釋。為深入研究鑄造碳化鎢/鎳基釬料合金復(fù)合材料,打下堅(jiān)實(shí)的理論基礎(chǔ)。關(guān)鍵詞:釬涂,耐磨復(fù)合材料,顆粒強(qiáng)化,鑄造碳化鎢,致密化Abst
3、ractOneofthemainresearchinganddevelopingaspectsofcompositematerialsinrecentyearsistheusingofcompositematerialsinabrasivewearconditions.Withthedevelopmentofindustry,thedemandofwear-resistingmetalsbecamemuchmorebigger.Atthesametimeitalsosetthenewrequesttothewea
4、r-resistingmetalsperformance.Therefore,itisofgreatimportancetoexploitnewmetalmatrixcompositestofrictionandwear.Inthisdissertation,thecastingtungstencarbidearechosenasthereinforcementphaseofthecompositewhiletheni-basefilleralloyNi82CrSiBasthematrixofthecomposi
5、te.Onthebasisofbrazecoating,wepreparenewcompositestofrictionandwearbycastingpenetrationandhot.presssinteringtechnologyonvacuum.TheresultsshowthatcastingpenetrationtechnologyCanmakeamuchcompact(93%)compositewithawellreinforcementparticledistributionandgoodinte
6、grationbymetallurgy.PinondisktwobodyabrasiontestsisperformedwithdifferentsizeofSiCabrasiveunderdifferentloads.Thetestshowthatthecast.WC/Ni82CrSiBcompositeshavebetterwearresistanceas“10timesasbodymaterialhighchromiumcastiron.Moreover,themorphology,microstructu
7、re,hardnessofcast-WC/Ni82CrSiBcompositesarecompletelyobservedanddeterminedbyusingX—raydiffraction(XRD),scanningelectronicmicroscope(SEM),HRS-150rockwellhardnesstester,opticalmicroscope,and71-microhardnesstester.Atthesametime,weanalysethereasonwhythehot—presss
8、interingcompositeshavemuchgapanddrawback.Thisbuildabettertheoreticalgroundforstudyingthenewcast.WC/Ni-basedfilleralloycompositeforbrazecoating.Keywords:brazecoating,abrasive-wearcomposite