Disadvantages thiab kev tiv thaiv txoj kev ntawm titanium alloy forging txheej txheem
Raws li qhov kev thov rau titanium alloy forgings tseem nce ntxiv hauv aerospace, kev kho mob thiab lwm yam lag luam, titanium alloy forgings yuav raug kev txom nyem los ntawm qee qhov tsis xws luag thaum lub sijhawm tsim khoom, thiab cov teeb meem no yuav cuam tshuam rau lawv cov kev ua tau zoo thiab kev ntseeg tau. Txawm li cas los xij, nws yog ib qho tseem ceeb kom nkag siab thiab daws cov teeb meem uas yuav tshwm sim thaum lub sij hawm tsim khoom. Cov hauv qab no yog qee qhov tsis xws luag ntawm titanium alloy forgings thiab lawv txoj kev tiv thaiv:
1. brittle tsis xws luag
Beta brittleness yog hais txog qhov kub thiab txias rhiab heev uas muaj nyob rau hauv qee cov titanium alloys, ua rau tawg tawg ntawm qhov kub thiab txias. -brittle defect yog ib qho tsis xws luag uas cov ntaub ntawv poob toughness nyob rau hauv qis kub ib puag ncig thiab muaj nkig tawg. Qhov no tshwm sim hauv qee qhov tshwj xeeb titanium alloys, tshwj xeeb tshaj yog cov titanium alloys dominated los ntawm beta theem.
Ua rau ntawm beta brittleness tsis xws luag:
Phase transformation kub siab dhau lawm:Thaum lub sij hawm hloov pauv kub hauv titanium alloy siab dhau lawm, theem yuav yooj yim precipitate ntawm qhov kub thiab txias, uas ua rau muaj kev nce hauv brittleness ntawm cov khoom.
Cov ntsiab lus tsis raug ntawm cov ntsiab lus alloying:Cov ntsiab lus tsis raug thiab kev faib ua feem ntawm cov ntsiab lus alloying, tshwj xeeb tshaj yog cov ntsiab lus beta ntau dhau hauv cov hlau, tuaj yeem ua rau beta brittleness.
Kev kho cua sov tsis raug:Cov txheej txheem kev kho cua sov tsis zoo yuav ua rau cov tiam thiab tsis sib luag ntawm theem, ua rau cov khoom siv brittleness.
Txoj kev tiv thaiv thiab tswj - brittle defects:
Kho cov alloy muaj pes tsawg leeg: Los ntawm rationally tsim cov alloy muaj pes tsawg leeg, tshwj xeeb tshaj yog kho cov ntsiab lus thiab kev faib ua feem ntawm theem thiab theem, tsis tshua muaj kub toughness ntawm titanium alloy tuaj yeem txhim kho.
Tswj cov txheej txheem kho cua sov: Siv cov txheej txheem kev kho cua sov kom tsim nyog, suav nrog kev daws teeb meem, kev kho kev laus, thiab lwm yam, txhawm rau txhim kho qhov sib xws thiab ruaj khov ntawm cov hlau thiab txo cov nag lossis daus ntawm theem.
Txo cov ntsiab lus impurity hauv cov hlau: Los ntawm kev ua kom zoo rau kev xaiv cov khoom siv raw thiab ntxiv dag zog rau cov txheej txheem smelting, txo cov impurities tsis zoo hauv cov hlau yuav pab txo qis beta brittleness.
Tswj tus nqi cua txias:Thaum lub sij hawm ua cov alloys, tswj cov cua txias kom tsis txhob txias ntau dhau yuav pab ua kom qeeb ntawm cov txheej txheem hloov pauv thiab txhim kho kev ruaj ntseg ntawm cov hlau.
2. Stomata thiab npuas:
Kev tiv thaiv thiab tswj txoj kev: Siv lub tshuab nqus tsev smelting, lub tshuab nqus tsev forging thiab lwm yam txheej txheem los txo cov roj solubility. Thaum lub sij hawm forging txheej txheem, qhov kub thiab cua ntawm cov hlau yog tswj los tiv thaiv kev nqus pa. Tsim nyog tsim cov qauv pwm kom txo tau cov roj cov khoom solubility.
3. Slag suav nrog:
Kev tiv thaiv thiab kev tswj cov txheej txheem: Txo cov tiam ntawm inclusions los ntawm kev nce qhov kub ntawm forging, txhim kho cov txheej txheem forging, nce lub forging siab, thiab lwm yam. Cov txheej txheem refining thiab nruj tswj ntawm raw khoom zoo yog saws los xyuas kom meej tias cov ntsiab lus ntawm inclusions nyob rau hauv raw cov ntaub ntawv raws li cov qauv.
4. Kev tawg:
Kev tiv thaiv thiab kev kho mob: Tswj qhov kub thiab txias thaum lub sij hawm forging txheej txheem kom tsis txhob txias txias ceev. Siv cov txheej txheem preheating tsim nyog los txhim kho cov khoom siv plasticity. Txhim kho cov txheej txheem forging thiab txo cov kev ntxhov siab deformation. Siv cov txheej txheem kho cua sov, xws li kev laus kev kho mob, txhawm rau txhim kho cov khoom tawg ua haujlwm.
5. Cov khoom txawv teb chaws:
Kev tiv thaiv thiab kev kho mob: siv cov qauv tshuaj ntsuam xyuas nruj kom ntseeg tau tias cov khoom siv raw tsis muaj teeb meem txawv teb chaws. Txhim kho cov qauv kev khiav hauj lwm thaum lub sij hawm forging txheej txheem los tiv thaiv kev sib xyaw ntawm txawv teb chaws impurities. Ntxuav thiab tswj cov cuab yeej tsis tu ncua kom txo cov tiam ntawm cov khoom siv txawv teb chaws.
6. Cov qoob loo loj heev:
Kev tiv thaiv thiab kev kho mob: Tswj lub forging kub thiab ceev, thiab txais yuav ib tug tsim nyog forging piv los xyuas kom meej tias cov grain loj ntawm cov khoom nyob rau hauv ib tug tsim nyog ntau yam. Cov txheej txheem ua kom zoo, xws li isothermal forging, yog siv los txhim kho qhov sib xws ntawm cov nplej.
7. Alpha embrittlement txheejtsis xws luag:
alpha embrittlement txheej yog hais txog ib txheej ntawm alpha theem-enriched cheeb tsam tsim nyob rau saum npoo ntawm titanium alloy forgings los yog ze rau nws nto, ua rau cov khoom nyob rau hauv lub cheeb tsam no qhia muaj zog alpha theem brittleness ntawm tsawg kub. Alpha embrittlement txheej tsis xws luag yuav tshwm sim nyob rau hauv qee qhov xwm txheej tshwj xeeb, tshwj xeeb tshaj yog thaum kub kub thiab txias ceev.
Ua rau ntawm embrittlement txheej tsis xws luag:
Cov cua kub kub:Thaum kub kub, theem hauv titanium alloys yog yooj yim concentrated rau saum npoo, tsim ib txheej embrittlement.
Kev txias txias:Thaum lub sij hawm ceev ceev cov txheej txheem ntawm titanium alloys nyob rau hauv high kub, lub theem accumulates nyob rau hauv lub nto vim lub ceev ceev txias ntawm lub nto.
Cov txheej txheem los tiv thaiv thiab kho embrittlement txheej tsis xws luag:
Tswj cov cua kub thiab lub sijhawm: Thaum lub sij hawm kho cua sov txheej txheem, tswj cov cua kub thiab lub sij hawm kom tsis txhob kub siab heev thiab ntev cua sov lub sij hawm kom qeeb lub enrichment ntawm theem.
Tswj tus nqi cua txias:Tom qab kev kho cua sov, kev tswj cov cua txias kom tsis txhob muaj cua txias ntau dhau yuav pab ua kom lub zog ntawm cov theem ntawm qhov chaw.
Kev kho deg:Los ntawm cov txheej txheem kho saum npoo, xws li cov khoom siv hlau kos duab, tshuaj polishing, thiab lwm yam, alpha embrittlement txheej ntawm qhov chaw tuaj yeem raug txo lossis tshem tawm thiab cov khoom zoo tuaj yeem txhim kho.
Txais cov txheej txheem kho cua sov kom tsim nyog:Xaiv cov txheej txheem kho cua sov uas tsim nyog, xws li kev kho cov dej ntub dej, kev kho kev laus, thiab lwm yam, tuaj yeem txhim kho cov qauv ntawm cov hlau thiab ua kom qeeb ntawm qhov tshwm sim ntawm alpha embrittlement.
Optimize cov alloy muaj pes tsawg leeg:Los ntawm rationally tsim cov alloy muaj pes tsawg leeg, tswj cov ntsiab lus thiab kev faib ntawm theem, thiab txo qhov kev pheej hmoo ntawm kev tsim ib txheej embrittlement ntawm qhov chaw.
Kev tiv thaiv thiab tswj cov txheej txheem embrittlement tsis xws luag yuav tsum muaj kev xav zoo hauv kev xaiv cov khoom siv, kev ua thiab kev kho cua sov. Rau cov kev thov tshwj xeeb, kev ntsuas tsim nyog yuav tsum tau ua kom qeeb lossis zam qhov tshwm sim ntawm alpha embrittlement raws li cov yam ntxwv ntawm cov khoom siv thiab kev siv.
Cov txheej txheem saum toj no tsis yog ib qho kev daws teeb meem ib zaug thiab yuav tsum tau ua kom pom tseeb thiab ua kom zoo raws li qhov xwm txheej tshwj xeeb. Hauv kev tsim khoom tiag tiag, kev siv nruj ntawm cov qauv tswj kev ua haujlwm zoo, ntxiv dag zog rau cov neeg ua haujlwm kev cob qhia, thiab kev txhim kho kev ua haujlwm kuj tseem yog ib qho tseem ceeb rau kev tiv thaiv thiab kho qhov tsis xws luag.
