I. Basic Properties ntawm TA18 Titanium Alloy
TA18 titanium alloy ua kom pom kev ruaj khov ntawm lub cev nyob rau hauv ob qho tib si tuab thiab nyias phaj scenarios, nrog ib tug modulus ntawm kwv yees li 110 GPa thiab ib tug ceev ntawm txog 4.4 g / cm³. Txawm li cas los xij, nws cov cua sov ua haujlwm thiab kev ua tau zoo yuav tsum tau tswj xyuas kom zoo los ntawm cov txheej txheem kho cua sov kom ua tau raws li qhov yuav tsum tau ua ntawm cov ntawv thov sib txawv.
II. Sib piv kev ntsuas cov ntaub ntawv ntsuas
Txhawm rau ntsuas qhov cuam tshuam ntawm cov txheej txheem sib txawv ntawm kev ua tau zoo ntawm TA18 titanium alloy, daim ntawv no xaiv peb tus neeg sawv cev cov txheej txheem rau kev sib piv. Cov kev sim ua raws li ASTM E8 / E8M-21 tensile xeem txoj kev thiab GB / T 228.1-2010 hlau cov ntaub ntawv tensile cuab yeej xeem txoj kev los xyuas kom meej qhov sib xws thiab repeatability ntawm cov ntaub ntawv.
1. Qauv A: Tom qab kev daws teeb meem + kev laus (T6 txheej txheem), UTS (qhov kawg tensile lub zog) yog kwv yees li 980 MPa, lub zog shear yog 620 MPa, thiab elongation yog 9%. Nyob rau hauv txoj kev no, TA18 titanium alloy qhia tau hais tias muaj zog thiab tej yam yas.
2. Qauv B: Siv cov txheej txheem ntawm kev ua thermomechanical ua raws li kev kho mob + kev laus, UTS nce mus txog kwv yees li 1050 MPa, lub zog shear yog 660 MPa, thiab elongation me ntsis txo mus rau 7%. Txoj kev no qhia txog cov nplej ua kom zoo dua qub thiab cov khoom tawg yooj yim los ntawm kev ua cov thermomechanical, ua kom cov khoom muaj zog.
3. Qauv C: Ntxiv kev ua kom zoo dua cov thermal tsis, tom qab isothermal annealing thiab re- kev laus kev kho mob, UTS ncav cuag li 1100 MPa, lub zog shear yog 710 MPa, thiab elongation poob mus rau 5%. Qauv C ua tiav theem metastable ntxiv dag zog rau thiab rov- laus, nrog rau qhov tseem ceeb ntawm cov ciam teb ntxiv dag zog thiab txhim kho phab ntsa dislocation, tab sis cov pob txha tawg yog nkig. Cov ntaub ntawv ntsuas qhia tau hais tias kev sib xyaw ua ke ntawm cov tshuaj muaj zog ntxiv dag zog thiab nag lossis daus ua kom muaj zog ua kom lub zog ntawm TA18 titanium alloy, tab sis cov nplej ua kom zoo dua qub thiab nce qhov sib txawv ntawm qhov ntom ntom kuj ua rau muaj kev lag luam tawm ntawm lub zog thiab tawv thiab cov pob txha tawg.
III. Microstructure Analysis
Lub microstructures ntawm peb pawg ntawm cov qauv qhia qhov sib txawv tseem ceeb: Txoj Kev A: Dominated los ntawm + qauv, nrog cov nplej loj loj thiab qis qis ntawm cov theem precipitated, cov pob txha pob txha feem ntau yog cov kab nrib pleb, uas qhia cov yas zoo. Txoj Kev B: Los ntawm kev ua cov thermomechanical, grain refinement thiab dislocation accumululation yog qhia, qhov loj thiab kev faib ntawm precipitated theem yuav zoo ib yam, lub tawg nto qhia ib tug sib tov ductile - brittle feature, ua kom tiav qhov sib npaug ntawm lub zog thiab plasticity. Txoj Kev C: Ua tiav cov theem metastable ntxiv dag zog thiab rov ua dua - laus, nrog rau qhov tseem ceeb ntawm cov ciam teb ntxiv dag zog thiab txhim kho cov phab ntsa dislocation, cov pob txha tawg nthuav tawm ntau txheej txheej txheej microstructure, nrog lub zog siab tshaj plaws tab sis kuj qis dua toughness. Kev tsom xam Microstructure qhia cov txheej txheem sab hauv ntawm kev ua tau zoo sib txawv hauv TA18 titanium alloy nyob rau hauv cov txheej txheem sib txawv, muab lub hauv paus theoretical rau cov txheej txheem optimization.
IV. Kev txiav txim ntoo thiab txheej txheem xaiv
Raws li kev ntsuas cov ntaub ntawv thiab kev tsom xam microstructure, daim ntawv no tsim ib tsob ntoo txiav txim siab nrog lub hom phiaj ntawm kev sib npaug siab shear zog thiab weldability: hauv paus node: Lub hom phiaj yog kom sib npaug siab shear zog thiab weldability. Thawj ceg: Yog tias lub zog siab yog qhov tseem ceeb, Txoj Kev A (kev kho mob + kev laus) lossis Txoj Kev C (isothermal annealing + re- laus) tuaj yeem xaiv. Ntawm lawv, Txoj Kev C muaj lub zog siab tshaj plaws, tab sis qhov kev pheej hmoo ntawm cov pob txha tawg yuav tsum raug sau tseg; Txoj Kev A muaj zog me ntsis tab sis zoo dua plasticity. Ob ceg: Yog tias yuav tsum muaj kev ua tau zoo, Txoj Kev B (thermomechanical ua raws li kev kho mob + kev laus) yuav tsum tau xaiv, uas ua tiav qhov sib npaug zoo ntawm lub zog thiab cov yas. Cov ntoo txiav txim siab kawg tso tawm cov txheej txheem sib xyaw ua ke (ib qho ntawm A, B, C), thiab ntsuas lub voj voog, nqi, thiab rov ua dua, muab cov lus qhia yooj yim rau kev xaiv cov txheej txheem.
V. Sib piv Dimensions thiab Competitor Analysis
(1) Sib piv Dimensions
1. Kev sib piv cov cuab yeej cuab tam: UTS, shear zog, thiab elongation ntawm TA18 titanium alloy nyob rau hauv cov kev kho cua sov sib txawv yog muab piv nrog cov Ti-6Al-4V thiab lwm yam Ti alloys. Cov txiaj ntsig tau pom tias TA18 muaj kev txwv ntau dua nyob rau hauv qee qhov kev xav tau siab dua - siv cov xwm txheej, tab sis qhov sib npaug ntawm qhov hnyav thiab cov khoom siv tau zoo yuav tsum tau ua kom zoo dua los ntawm cov txheej txheem qhov rais . 2. Cov txheej txheem thiab cov nqi sib piv: Nws suav nrog kev siv hluav taws xob siv hluav taws xob, kev siv hluav taws xob, lub voj voog, machinability, weldability thiab cov ntaub ntawv traceability. Tus nqi txheej txheem ntawm TA18 titanium alloy yuav tsum tau muab xam rau hauv cov nqe lus ntawm kev kho cua sov, cov khoom siv depreciation thiab cov nqi zog. (2) Kev txheeb xyuas cov neeg sib tw: Ti-6Al-4V tuaj yeem muaj qhov zoo hauv kev weldability thiab qis-kub toughness, tab sis tus nqi thiab kev ua haujlwm nyuaj yuav tsum sib npaug. Hauv qhov sib piv, TA18 titanium alloy tuaj yeem ua tiav lub zog ntau dua thiab tswj tau qhov sib npaug ntawm cov xwm txheej tshwj xeeb los ntawm kev ua kom zoo dua, thiab muaj qhov tshwj xeeb ntawm daim ntawv thov. VI. Kev xaiv cov khoom tsis nkag siab thiab kev ceev faj Hauv cov txheej txheem xaiv cov khoom, yuav tsum zam cov kev nkag siab tsis zoo hauv qab no: 1. Tsav los ntawm ib qho kev ntsuas lub zog: Tsis quav ntsej plasticity, toughness thiab cuam tshuam kev ua tau zoo tuaj yeem ua rau nkig tawg thiab lwm yam tsis ua haujlwm thaum siv cov khoom siv . 2. Tsav tsuas yog los ntawm tus nqi thiab tsis quav ntsej txog kev cia siab rau lub sijhawm ntev: Kev xaiv cov khoom siv roj ntsha, kev sib npaug thiab kev ua haujlwm tseem ceeb hauv lub neej. nruab nrab ntawm tus nqi thiab kev ua tau zoo yuav tsum tau ua kom tiav kev txiav txim siab . 3. Tsis quav ntsej txog qhov cuam tshuam ntawm kev ua haujlwm thiab weldability ntawm tus nqi tawm los thiab kev tswj kom zoo: Kev ua tau zoo thiab weldability ncaj qha cuam tshuam rau tus nqi tawm los thiab kev tswj kom zoo, thiab yuav tsum tau txiav txim siab tag nrho hauv cov txheej txheem xaiv.
Xya. Xaus thiab Outlook
Raws li cov txheej txheem tshwj xeeb, TA18 titanium alloy tuaj yeem ua tiav qhov sib npaug ntawm lub zog siab thiab tswj tau qhov ductility, thiab cov qauv tsim yuav tsum tau ua nyob ib ncig ntawm lub qhov rais txheej txheem. Cov txheej txheem xeem ntawm ASTM E8/E8M-21 nyob rau hauv American standard system thiab GB/T 228.1-2010 nyob rau hauv Suav tus qauv system muab kev txhawb zog rau kev sib piv ntawm cov ntaub ntawv. Hais txog kev lag luam cov ntaub ntawv, LME qhia tau hais tias tus nqi ntau ntawm titanium ingots yog kwv yees li 9,000-12,000 USD / ton, thiab cov chaw hais lus ntawm titanium alloy daim hlau ntawm Shanghai Metals Market fluctuate nyob rau hauv thaj tsam ntawm 120,000-200,000 RMB / ton, uas yog pab tau rau kev tsim cov nqi. Nyob rau hauv lub neej yav tom ntej, nrog kev nce qib ntawm cov ntaub ntawv tshawb fawb thiab cov txheej txheem thev naus laus zis, kev ua tau zoo thiab cov txheej txheem tshiab ntawm TA18 titanium alloy yuav txuas ntxiv mus. Los ntawm kev tshawb nrhiav ntxiv ntawm cov txheej txheem kho cua sov tshiab, cov txheej txheem tswj microstructure, thiab cov tswv yim ua kom zoo dua tus nqi, TA18 titanium alloy yuav tsum ua kom muaj txiaj ntsig ntau dua hauv kev siv dav hlau, marine engineering thiab lwm yam haujlwm.