氮化釩制備過程的研究.pdf

1、武漢科技大學(xué)碩士學(xué)位論文氮化釩制備過程的研究姓名：徐先鋒申請學(xué)位級別：碩士專業(yè)：材料學(xué)指導(dǎo)教師：王璽堂20030501塞墨型絲占蘭型!蘭竺鯊蘭一一ABSTRACTFerrovanadium，vanadiumcompoundsandmetallicvanadiumarewidelyusedinmetallurgy’chemicalandelectronicalindustry，etcNitmVanbecomesoneofimponanta

2、lloyadditivesofhigh—strengthsteeIforitshighcapaeityofgrainrefjningandprecipitationstren舀hingThefunctionofprecipitationstrengthingandgminrefiningwefestrcngthenedbecausethecombinationofvanadiumandnitmgenismorestablyanddisp

3、ersiblethanthatofvaIladiumandcarbonIntheprcsenceofvanadi啪，nitrogenisconverted療omarIimpurityintoacost—e疏ctjveaIloyAsakindofe疏ctivea11deconomicalalloyaddmVe，Ni_lroVaIl(vN)isappliedbymoststeelenterprises柚dconsumers1110ugllt

4、hedevelopmentandapplicationofVNstanIateinchina，thereisabundantv齟adiumresourceandour∞untryisoneofn塢la_rgestcountriesofsteelpmductionandcons咖叩tion，soVN硒chiefmicmalloyedstceI8dditiveisimperativeunderthesituationWiththewidel

5、yusageofVN，morealldmorehi曲一strengthsteelcontainingvanadiuma11dn“mgenwillappearsothestudyanddeVelopmentofVNisveryimportantThethermodyn啪icanalysisshowsthattheorderofreductionofvanadiumoxideisV205。V204，V203aIldV0IntIlercalr

6、eactionprocess，thercductionofV203andV204isignored；onlythereductionofV205andVOistakenintoaccoumUndertheconditionofexperiment，bomcarbon粕dH2canreduceVanadiumoxide柚dthepressureofgasla唱elya矗ectsthetcmperatureofreductionV205ca

7、flbereducedintoV204underitsmeltjngpointVNcanbet舢slatedintoVCa圭hi曲ertempe豫lureIndi行brentamosphefe，thereductionp蚴∞scsofV吼adiumoxidearedi訊冊nt，andinn地d【mosphereofN2，也ereductionreactioniseasiefThetemperatu佗r螄gesofreductionand

8、nitrogenization、veremadccenainbythearIaiyzingofXRD柚dTGcurvejndi舵renttemperatu陀柚datmosphemAbout1450K，the4mreductionisquickest，whileaboutl420K，nitrogcnizationgainsthehi曲estvelocity111ekineticsanalysisshowsthattheIslreducti

9、onise船iest，the2耐and3rdreductionismoredi街cult，andthe4thI℃ductionismostdifficultThevalueofEafornitrogenizationis3646KJ，mOl，it’sbetweenthalofthe3一and4‰sInthes鋤pJes，withthecoefncientofmixedcarbon(L)increasing，thecarbonconten