1. Yuav ua li cas yog lub ntsiab deformation mechanism ntawm industrial ntshiab titanium nyob rau hauv qhov kev txiav txim ntawm static thiab tsov rog loads?
Lub ntsiab deformation mechanism yog plam. Raws li cov yas deformation tshwm sim, ntau cov hlua khi txuas ntxiv tshwm sim, thiab cov nplej thiab cov muaju yog ncab thiab distorted. Thaum cov yas deformation dhau ib qho kev txwv, kev tawg tshwm sim. Thaum nyob rau hauv ib qho kev nyuaj siab lub xeev, shear slip yog dominant, uas yog, lub plam feem ntau tshwm sim nyob rau hauv ob pawg ntawm cov dav hlau uas yog 45 degree rau lub tensile quab yuam. Raws li daim ntawv hla tebchaws ua ntu zus, cov kab nrib pleb txuas ntxiv txhim kho, thiab lawv qhov kawg tseem ntse thiab notched. Cov nplej ze rau qhov tawg kawg yog stretched vim yog deformation loj heev. Txhua lub lis piam zoo li ib qho siv lead ua txwv los ntawm ib puag ncig, thiab lawv raug txiav ib qho tom qab lwm vim kev poob.
2. Dab tsi yog qhov txawv ntawm cov yam ntxwv ntawm lub zog ntawm titanium nyob rau hauv static load thiab cov ntaub ntawv hlau uas nquag siv hauv cov hlab ntsha siab?
Lub zog cov yam ntxwv ntawm titanium nyob rau hauv static load yog txawv los ntawm cov hlau feem ntau siv nyob rau hauv siab hlab ntsha. Nws tsis muaj qhov pom tseeb ntawm lub cev tab sis tsim cov cwj pwm tshwj xeeb xws li pom zoo li yielding, acoustic emission phenomena, thermoplasticity, txias creep, pseudo-elasticity, thiab cov duab nco los.
3. Vim li cas kev lag luam ntshiab titanium tseem muaj siab toughness ntawm qhov kub ntawm 196 degree? Dab tsi yog yam uas cuam tshuam rau nws qhov kub thiab txias toughness?
Lub zog ntawm kev lag luam ntshiab titanium nce raws li qhov kub thiab txias, tab sis lub plasticity tsis txo qis ntau, thiab nws tseem muaj qhov zoo ductility thiab toughness, yog li nws tsim nyog siv los ua cov khoom siv rau cov hlab ntsha uas tsis tshua muaj siab. Yog vim li cas vim li cas titanium muaj siab plasticity ntawm qhov kub thiab txias yog tias nws txoj kev deformation tseem ceeb ntawm qhov kub thiab txias yog qhov tsim ntawm ntxaib. Nyob rau hauv tib lub degree ntawm deformation, raws li qhov kub thiab txias, qhov ceev thiab pes tsawg ntawm cov nplej tsim nyob rau hauv cov nplej nce, thiab nyob rau tib lub sij hawm, lub interlayer duab ntawm tus ntxaib hloov. Raws li qib ntawm deformation nce, cov polycrystalline aggregate yuav loj hlob mus rau hauv cov muaju, ua kom muaj zog ntawm cov nplej lawv tus kheej, thiab ces pib intergranular deformation.
Lub ntsiab tseem ceeb cuam tshuam rau kev ua haujlwm kub ntawm titanium yog cov ntsiab lus ntawm cov ntsiab lus interstitial. Kev lag luam ntshiab titanium nrog cov ntsiab lus tsis sib xws (N, 0, H, C) thiab cov ntsiab lus hlau tau zoo dua txias brittleness kuj. Thib ob, cov txheej txheem tsim khoom ntawm cov khoom siv titanium kuj muaj kev cuam tshuam rau kev ua haujlwm qis. Ntxiv nrog rau kev tswj tsis zoo ntawm cov txheej txheem cov txheej txheem thiab qhov cuam tshuam ntawm kev cuam tshuam cov pa roj impurities ntawm kev ua tau zoo, tus nqi txias deformation hauv stamping kuj cuam tshuam rau kev ua haujlwm kub. Thaum tus nqi txias deformation dhau ib qho kev txwv, qis-kub brittleness yuav tshwm sim.
4. Vim li cas nws thiaj li hais tias cov ntaub ntawv anisotropic titanium yuav ua rau cov khoom pov tseg ntau dua raws li cov qauv tsim ntawm isotropic steel siab hlab ntsha?
Muaj ntshiab titanium thiab a-homtitanium alloysyog hexagonal kaw-packed crystals nyob rau hauv chav tsev kub, thiab lawv cov hlau lattice muaj pom tseeb nyiam orientation phenomena, uas ua rau anisotropy ntawm titanium ib leeg muaju. Qhov no anisotropy yog ntxiv dag zog rau lub sij hawm dov txheej txheem ntawm titanium cov ntaub ntawv kom cov dov titanium cov ntaub ntawv muaj cuab kev anisotropy. Yog li ntawd, titanium siab hlab ntsha muaj cov txiaj ntsig zoo dua bidirectional ntxiv dag zog, uas yog, cov ntaub ntawv titanium nyob rau hauv qhov kev txiav txim ntawm kev ntxhov siab bidirectional. Lub zog nyob rau hauv kev ntxhov siab yog zoo heev piv rau ib-txoj kev lub zog, thiab nws muaj ib tug ntxiv dag zog rau nyob rau hauv ib tug ob-txoj kev kev nyuaj siab piv. Rau kev ntxiv dag zog ntawm cov hlab ntsha titanium siab, qhov kev xav thiab kev sim tau ncav cuag 50% thiab 40% feem. Rau ib puag ncig yooj yim titanium siab lub nkoj, thaum lub voj voog ncig ua ke nrog cov kev taw qhia dov ntawm lub phaj, tus nqi theoretical thiab kev sim tus nqi ntawm kev txhawb zog ncav cuag 4 2 % thiab 3 6 % feem; Thaum cov kev taw qhia ncig yog perpendicular mus rau dov kev taw qhia ntawm lub phaj, tus nqi theoretical thiab kev sim ntsuas tau nce mus txog 48% thiab 37% feem. Yog li ntawd, phab ntsa thickness xam txoj kev ntawm titanium siab hlab ntsha yog raws li cov kev cai ntawm GB 150-2011 "Pressure Vessels", uas yuav tsum tau 20% mus rau 40% ntau titanium khoom yuav tsum tau noj.
5. Vim li cas lub peev xwm ntawm lub voj voog ntawm cov titanium cov khoom siv hluav taws xob hloov pauv tau siab dua li qhov muaj peev xwm ntawm axial load-bearing?
Vim qhov nyiam kev taw qhia ntawm kev lag luam ntshiab titanium thiab "hom titanium alloy", anisotropy ntawm titanium ib leeg siv lead ua yog tshwm sim. Lub degree ntawm anisotropy no ntxiv txhim kho nrog cov txheej txheem dov. Tshwj xeeb, dov titanium raj feem ntau yog orthotropic, uas yog, axial, circumferential, thiab radial cov lus qhia yog peb anisotropic lub ntsiab axis cov lus qhia; thiab lawv yeej ib txwm dov rau hauv ib qho kev taw qhia, yog li cov dov titanium tshav kub txauv raj yog Qhov degree ntawm anisotropy yog siab tshaj ntawm cov phaj. Raws li cov axial thiab circumferential load-bearing xeem cov qhabnias ntawm titanium raj, lub circumferential yield txwv thiab lub zog txwv yog ob qho tib si siab tshaj qhov kev taw qhia axial, thiab qhov sib txawv ntawm yield txwv mus txog 33%. Yog li ntawd, lub circumferential load-bearing muaj peev xwm ntawm dov titanium raj yog ho ntau dua. Siab tshaj qhov kev taw qhia axial, lub zog tawm los thiab qhov kawg lub zog ntawm lub titanium raj nyob rau hauv biaxial kev nyuaj siab yog ho siab tshaj qhov nyob rau hauv uniaxial kev nyuaj siab.
