Kev Sib Sau thiab Qib Qib
Zr702, tsim UNS R60702, yog unalloyed zirconium muaj nyob ib ncig ntawm 99.2 feem pua zirconium nrog me me tswj ntxiv ntawm tin, hlau thiab chromium thiab cov ntsiab lus hafnium ib txwm txwv rau 4.5 feem pua. Zr705, tsim los ntawm UNS R60705, yog alloyed nrog txog 2.0 mus rau 3.0 feem pua niobium, uas ua rau nws muaj zog ntau dua li cov qib unalloyed yam tsis muaj qhov poob loj ntawm ductility lossis corrosion kuj. Ob leeg yog them los ntawm ASTM B550 rau phaj, ntawv thiab sawb thiab ASTM B551 rau bar, hlau thiab forgings, uas teem lub chemistry, mechanical zog thiab tolerances. Vim hais tias hafnium yog tshuaj zoo ib yam li zirconium thiab yog kim rau kev sib cais, qhov tso cai qib hafnium yog ib qho tseem ceeb ntawm cov lus qhia thiab nws cov nqi cuam tshuam.
Lub zog thiab mechanical cwj pwm
Qhov sib txawv tseem ceeb ntawm ob qib yog lub zog. Unalloyed Zr702 muaj lub zog tawm los ntawm kwv yees li 200 megapascals nyob rau hauv qhov mob annealed, thaum Zr705 nce mus txog 500 megapascals lossis ntau dua nyob ntawm cov khoom siv thiab kev kho cua sov. Qhov sib txawv ntawd tso cai rau Zr705 siv rau hauv cov ntu nyias lossis ntawm kev tsim siab dua, thiab hauv ntau cov hlab ntsha cov phab ntsa txo qis offsets cov khoom siv ntau dua ib kilogram. Ob qib khaws cov khoom muaj txiaj ntsig zoo thiab tuaj yeem tsim thiab welded, txawm hais tias Zr705 yuav tsum tau ua tib zoo tswj xyuas ntau dua vim tias nws lub zog siab dua yog nrog los ntawm kev nkag siab ntau dua rau kev kho cua sov thiab cov txheej txheem vuam. Kev tsim qauv yuav tsum ua raws li qhov tso cai hauv cov cai siv rau cov khoom tshwj xeeb thiab cov xwm txheej es tsis yog xav tias tus nqi nkaus xwb.
Corrosion Resistance nyob rau hauv Process Media
Ob qib tiv thaiv ntau yam kev tawm tsam, nrog rau cov tshuaj hydrochloric thiab sulfuric acid, cov organic acids xws li acetic thiab formic acid, hydrogen peroxide, seawater thiab ntau chloride bearing ib puag ncig, thiab ob qho tib si tsim cov oxide zaj duab xis tiv thaiv tus kheej thaum puas. Hauv feem ntau ntawm cov xov xwm no ob qib coj zoo sib xws, yog li kev tiv thaiv corrosion ib leeg tsis tshua txiav txim siab xaiv. Qhov sib txawv tshwm sim nyob rau hauv ib puag ncig tshwj xeeb thiab kub kub, qhov chaw alloying muaj peev xwm cuam tshuam rau tus cwj pwm, thiab hauv hydrogen muaj kev pabcuam, qhov twg zirconium tuaj yeem nqus tau hydrogen thiab tsim cov hydrides brittle. Hydrogen pickup nyob ntawm qhov nruab nrab, qhov kub thiab txias, qhov chaw ntawm qhov chaw thiab muaj cov neeg txhawb nqa, yog li nws yuav tsum tau soj ntsuam rau cov txheej txheem tiag tiag es tsis xav los ntawm lub npe qib.
Hom Kev Pabcuam thiab Cov Txheej Txheem Xaiv
Zr702 feem ntau yog siv rau cov khoom siv hluav taws xob, cov kav dej, cov hlab ntsha, cov kab thiab cov li qub uas cov txheej txheem corrosive tab sis cov neeg kho tshuab lub luag haujlwm yog nruab nrab, thiab qhov siab tshaj plaws corrosion kuj nrog cov ntaub ntawv yooj yim yog qhov tseem ceeb. Zr705 yog xaiv qhov twg tib qho kev tiv thaiv corrosion yuav tsum tau ua ke nrog lub zog siab dua, piv txwv li hauv cov hlab ntsha siab, cov kav dej siab, cov agitators thiab cov khoom raug rau cov khoom siv thauj khoom lossis kev yaig, thiab qhov uas cov phab ntsa nyias nyias muab kev txuag hauv qhov hnyav lossis cov txheej txheem kom zoo dua. Cov txheej txheem xaiv yuav tsum sib piv cov nqi tag nrho, suav nrog cov khoom siv, tuab, vuam, kev tshuaj xyuas thiab tus nqi ntawm kev kho cua sov tom qab vuam, ntau dua li tus nqi ib kilogram, vim hais tias cov seem Zr705 yuav pheej yig dua tag nrho hauv kev tsim kev kub siab.
Fabrication, Vuam thiab tshuaj xyuas
Zirconium yuav tsum tau tiv thaiv los ntawm kev sib kis thaum lub sij hawm fabrication, vim hais tias nws reacts nkag tau nrog oxygen, nitrogen, hydrogen thiab carbon ntawm qhov kub thiab txias thiab qhov tshwm sim tshwm sim embrittles cov khoom. Vuam yog nqa tawm nyob rau hauv ib qho chaw inert nrog ceev faj tiv thaiv thiab, qhov twg yuav tsum tau, ib tug trailing shield thiab ntxuav, thiab weld thiab tshav kub cuam tshuam cheeb tsam yuav tsum kaj thiab tsis muaj xim. Txiav, sib tsoo thiab sib sau cov cuab yeej yuav tsum muaj nplooj siab rau zirconium los yog huv si huv si, vim hais tias cov hlau tsis huv ua rau lub zos corrosion. Kev tshuaj xyuas muaj xws li dye penetrant lossis lwm yam kev ntsuam xyuas saum npoo thiab, qhov twg tau teev tseg, radiographic lossis ultrasonic kuaj ntawm welds, ua ke nrog kev tshuaj ntsuam xyuas ntawm cov khoom xa tuaj. Cov ntaub ntawv ntawm cov xov tooj cua sov, cov khoom siv thiab cov txheej txheem vuam yuav tsum tau khaws cia rau lub neej ntawm cov khoom siv.
Cov lus nug nquag
Q: Qhov txawv ntawm Zr702 thiab Zr705 yog dab tsi?
Zr702 yog unalloyed zirconium, thaum Zr705 yog alloyed nrog li ntawm 2.0 mus rau 3.0 feem pua niobium, uas tsa nws lub zog tawm los mus rau kwv yees li 500 megapascals los yog ntau tshaj tawm tsam txog 200 megapascals rau Zr702.
Q: Qib twg muaj kev tiv thaiv corrosion zoo dua?
Hauv cov txheej txheem tshuaj lom neeg feem ntau ob qhov ua tau zoo sib xws, yog li kev tiv thaiv corrosion ib leeg tsis tshua txiav txim siab thiab kev xaiv feem ntau yog tsav los ntawm lub zog, siab thiab kub.
Q: Thaum twg yuav tsum xaiv Zr705?
Qhov twg corrosion kuj ntawm zirconium yuav tsum tau ua ke nrog lub zog siab dua, xws li cov hlab ntsha siab, cov kav dej siab thiab cov khoom siv hauv cov khoom siv thauj khoom, feem ntau tso cai rau cov phab ntsa nyias.
Q: Cov qauv twg npog zirconium phaj thiab bar?
ASTM B550 npog zirconium phaj, ntawv thiab sawb thiab ASTM B551 npog bar, hlau thiab forgings, thiab ob qho tib si teeb chemistry, mechanical zog thiab kam rau ua.
Q: Vim li cas hafnium cov ntsiab lus tau teev tseg?
Hafnium yog tshuaj lom neeg zoo ib yam li zirconium thiab kim kom sib cais, yog li qhov siab tshaj plaws hafnium cov ntsiab lus yog tswj nyob rau hauv cov lus qhia thiab nws cuam tshuam rau ob qho tib si khoom thiab cov nqi khoom.
Q: Dab tsi yog qhov tseem ceeb fabrication kev pheej hmoo nrog zirconium?
Kev kis kab mob los ntawm oxygen, nitrogen, hydrogen, carbon thiab hlau ntawm qhov kub thiab txias ua rau embrittlement thiab localized corrosion, yog li vuam xav tau tag nrho cov roj inert tiv thaiv thiab huv si, mob siab rau cov cuab yeej.