Tooj liab: txhais, muaj pes tsawg leeg, hom, khoom, thiab kev siv
Tooj liab yog ib yam tshuaj uas yog hlau. Nws cov khoom tseem ceeb yog tias nws muaj hluav taws xob zoo heev, thermal conductivity, thiab zoo corrosion kuj. Nws kuj yog ductile thiab muaj ib qho nthuav xim liab-xim av. Kev sib xyaw ua ke ntawm cov khoom no ua rau kev siv dav ntawm tooj liab rau engineering thiab kev siv zoo nkauj.
Copper yog dab tsi?
Tooj liab yog ib qho tshuaj lom neeg, tus lej 29 ntawm lub sij hawm ntawm lub ntsiab lus. Lub cim tooj liab yog Cu, los ntawm Latin "khob". Nws yog cov hlau nplaum uas muaj xim liab-xim av, nws yog siv dav vim nws cov thermal conductivity thiab hluav taws xob siab.
Dab tsi yog Keeb Kwm Ntawm Tooj?
Keeb kwm ntawm tooj liab hnub rov qab mus rau 8,700 BC. Lub pendant tooj liab uas tau pom nyob rau sab qaum teb Iraq tau muaj hnub rov qab mus rau kwv yees li hnub ntawd thiab tam sim no xav tias yog cov khoom qub tshaj plaws uas ua los ntawm tooj liab. tooj liab yog ib qho tseem ceeb hlau nyob rau hauv ntau ancient civilizations, tab sis nws yog feem ntau pom zoo tias cov Mesopotamians (nyob rau hauv Northern Iraq) nrhiav tau tooj liab. Qhov tseeb, ib lub sij hawm nyob rau hauv prehistory yog lub hnub nyoog tooj liab ntawm 5,500 BC thiab 4, 000 BC, feem ntau hu ua Chalcolithic Age los ntawm Greek lo lus rau tooj liab (chalkos) thiab pob zeb (lithos).
Tooj liab yog ib qho ntawm ob peb cov hlau uas tuaj yeem tshwm sim ib txwm muaj nyob rau hauv nws hom xim hlau. Qhov no txawv ntawm cov hlau feem ntau uas yuav tsum tau muab rho tawm los ntawm metallurgy los ntawm cov ore. Nyob rau hauv cov chaw uas ib txwm muaj tooj liab tshwm sim, thev naus laus zis ntawm metallurgy tsis tsim nyog rau cov kev vam meej pib ua hauj lwm nrog tooj liab los tsim riam phom thiab ornaments.
Dab tsi yog Lwm Lub Sij Hawm Rau Tooj?
Lwm lo lus rau tooj liab yog lo lus Latinkhob, uas muab tooj liab nws lub cim Cu nyob rau hauv lub sij hawm ntawm lub ntsiab lus. Lub npe Latin rau tooj liab yog keeb kwm los ntawm cov kob ntawm Cyprus, vim hais tias cov kob yog qhov loj ntawm tooj liab nyob rau hauv ancient sij hawm. Cuprum yog "hlau ntawm Cyprus."
Copper yog dab tsi?
Tooj liab yog ib qho tshuaj lom neeg. Nws yog tsim los ntawm ib hom atom nkaus xwb-nws tsis tuaj yeem tawg mus rau hauv cov khoom yooj yim. Lub atom tooj liab muaj tus lej atomic ntawm 29, uas txhais tau hais tias nws cov atomic nucleus muaj 29 protons.
Tooj liab yog muab rho tawm los ntawm tej yam ntuj tso ores-xws li tooj liab sulfide ore (xws li chalcopyrite) los yog tooj liab oxide ore. Cov ore no yog mined, crushed, thiab ua tiav los ua tooj liab. Cov tooj liab no muaj nyob hauv thaj chaw ntawm North thiab South America (lub teb chaws xws li Chile thiab Peru), nrog rau hauv thaj chaw xws li Ural Roob hauv Russia, thiab hauv Zambia thiab Democratic Republic of Congo hauv Africa.
Dab tsi yog cov txheej txheem sib txawv los ua tooj liab?
Cov txheej txheem sib txawv los ua tooj liab tau piav qhia hauv qab no:
1. Mining
Mining ntawm tooj liab ores feem ntau yog ua nyob rau hauv loj qhib qhov mines. Cov no yog qhib, stepped qhov hauv av uas maj mam khawb tob. Cov khoom tawg yog siv los tawg cov pob zeb, thiab cov pob zeb uas tau raug thauj mus rau crushing rau hauv me me rau kev ua.
2. Kev rho tawm
Raws li ob hom tooj liab ore, muaj ob lub ntsiab purification txheej txheem. Cov txheej txheem hydrometallurgical yog siv rau oxide ores. Lub crushed ore yog heaped thiab ib tug acid-leaching tov yog percolated los ntawm lub heap. Qhov no tsim cov kua dej cev xeeb tub. Cov txheej txheem pyrometallurgical yog siv rau sulfide ores. Kev rho tawm ntawm cov ore yog ua los ntawm froth flotation thiab thickening raws li qhov ceev ntawm cov khoom.
3. Kev huv huv
Rau oxide ores, hydrometallurgy yog siv. Qhov no txhais tau hais tias cov kua qaub cev xeeb tub raug xa mus rau cov txheej txheem tshem tawm cov kuab tshuaj kom pom cov tooj liab hauv cov tshuaj. Cov tshuaj no ces xa mus rau electrowinning, qhov twg hluav taws xob yog siv los tso cov khoom tooj liab. Rau sulfide ores, pyrometallurgy yog siv, uas txhais tau hais tias ib tug smelter yog siv los tsim cov raw tooj liab. Qhov no yog ces purified ntxiv los ntawm electrorefining.
4. Alloying
Copper alloys yog tsim los ntawm thawj melting cov ntaub ntawv alloying, thiab ces melting tooj liab ntxiv rau nws. Tom qab ntawd cov molten sib tov yog cam khwb cia thiab tso cai rau txias thiab solidify.
5. Electrorefining
Electrorefining ntawm tooj liab cuam tshuam nrog electrolytically dissolving cov khoom tsis zoo tooj liab rau hauv kev daws. Cov tooj liab ntshiab yog electrochemically tso rau ntawm ib qho electrode los ntawm kev siv hluav taws xob tam sim no los ntawm kev daws teeb meem. Qhov no tshem tawm impurities los ntawm tooj liab kom ua tiav siab dua purity. Txawm li cas los xij, cov txheej txheem yog kim thiab muaj kev xav tau hluav taws xob ntau heev.
Cov yam ntxwv ntawm tooj liab yog dab tsi?
Copper hlau muaj cov yam ntxwv tseem ceeb ntawm kev ua hluav taws xob zoo thiab thermal conductor. Nws tseem yog malleable thiab ductile, uas txhais tau tias nws tuaj yeem khoov tau yooj yim. Qhov no ua rau nws yooj yim rau kev ua haujlwm nrog, piv txwv li, nrog cov cabling hloov tau yooj yim. Lwm tus yam ntxwv tseem ceeb ntawm tooj liab hlau yog nws cov corrosion kuj, tshwj xeeb tshaj yog nyob rau hauv dej thiab seawater ib puag ncig. Thaum kawg, tooj liab muaj qhov zoo ntawm kev ua kom zoo nkauj, vim nws muaj xim liab-xim av thiab tuaj yeem polished.
Cov xim ntawm tooj liab yog dab tsi?
Copper feem ntau yog xim liab-xim av. Txawm li cas los xij, cov tooj liab ntshiab ua ntej oxidation tiag tiag yog xim liab, tab sis qhov tsim ntawm xim av tooj liab oxide tshwm sim sai heev uas cov tooj liab uas tau yooj yim yuav yog xim liab-xim av. Tooj kuj tseem tuaj yeem muaj xim ntsuab tarnish (xws li nyob rau ntawm Pej thuam ntawm Liberty) - qhov no yog tooj liab carbonate.
Cov tooj liab zoo li cas?
Tooj liab zoo li liab-xim av ci hlau. Cov tooj liab tuaj yeem ua tiav rau ntau hom kev siv tswv yim, xws li cov xov hlau uas qhia hauv daim duab 1 hauv qab no, nrog rau cov kav dej thiab cov khoom siv hluav taws xob:
Dab tsi yog qhov txawv ntawm tooj liab?
Tooj liab muaj nyob rau hauv ntau hom rau kev siv sib txawv. Cov khoom thiab kev siv ntawm txhua qib ntawm tooj liab nyob ntawm qhov purity ntawm tooj liab thiab dab tsi alloying ntsiab (yog tias muaj) suav nrog. Cov npe hauv qab no yog ntau hom tooj liab:
1. Cov Hlau Hlau
Tooj hlau siv kom zoo dua ntawm cov hlau zoo heev hluav taws xob conductivity. Nws yog tus neeg xyuas pib tshaj plaws rau feem ntau cov ntawv thov hluav taws xob. Nws yog siv rau cov dej ntws loj hauv kev lag luam, thiab tseem siv rau hauv tsev, txoj cai nqes mus rau cov xaim hauv koj lub tsev rau qhov hluav taws xob thiab teeb.
2. Tubing tooj liab
Copper tubing tau siv dav rau cov dej haus hauv tsev vim nws qhov kev tiv thaiv corrosion thiab yog li nws lub neej ntev. Ob peb xyoos dhau los, nws tau ua tus qauv hauv feem ntau ntawm lub ntiaj teb siv tooj liab tubing rau cov kav dej hauv tsev. Cov raj muaj nyob rau hauv qhov sib txawv diameters thiab ntsuas (phab ntsa thicknesses). Tus nqi siab ntawm tooj liab thiab qhov tshwm sim ntawm cov khoom siv yas zoo dua qub txhais tau tias tooj liab tau dhau los ua tsawg dua xaiv.
3. Copper Alloys
Qhov thib ob feem ntau tooj liab alloys yog tooj dag (alloyed nrog zinc) thiab bronze (alloyed nrog tin). Brass feem ntau yog siv ntau dua. Nws yog siv rau cov kav dej, cov twj paj nruag, thiab cov khoom dai kom zoo nkauj. Qhov sib ntxiv ntawm zinc muab cov alloy muaj zog dua thiab ductility. Bronze muaj cov yam ntxwv zoo sib xws rau tooj liab, xws li: nws cov thermal conductivity, zoo heev ductility, thiab tiv taus dej ntsev corrosion. Bronze yog li ntawd siv rau bearings thiab bushings, nrog rau lub nkoj impellers.
4. Cov tooj liab dawb
Ntshiab tooj liab yog npaj tshwj xeeb los xyuas kom meej qhov tsawg kawg nkaus ntawm impurities, maximizing lub thermal thiab hluav taws xob khoom ntawm tooj liab. Ntshiab tooj liab zoo li softer thiab tsis tawv dua tooj liab nrog additives los yog me me alloying cov ntaub ntawv. Nws yog qhov zoo tshaj plaws siv nyob rau hauv precision hluav taws xob Cheebtsam, uas nws cov hluav taws xob conductivity thiab tsawg thermal expansion yog zoo tagnrho.
5. Copper Nanoparticles
Copper nanoparticles yog cov khoom me me ntawm tooj liab, lossis cov khoom siv tooj liab, uas nyob hauv qhov loj ntawm 1-100 nm. Nanoparticles tau pom tias muaj tus cwj pwm txawv ntawm cov khoom siv ntau. Nyob rau hauv cov ntaub ntawv ntawm tooj liab nanoparticles, lawv qhia heev catalytic kev ua ub no rau industrial tshuaj tiv thaiv, tej zaum vim lawv loj deg-cheeb tsam-rau-ntim piv. Tsis tas li ntawd, tooj liab nanoparticles tau pom cov tshuaj tiv thaiv kab mob zoo heev.
6. Dawb-Machining tooj liab
Dawb-machining tooj liab muaj me me (<1%) of other alloying elements added to improve the machinability of the copper. Free-machining copper can then be more easily machined into items such as welding nozzles and soldering iron tips.
7. Cov ntawv tooj liab thiab daim hlau
Cov nplooj ntawv tooj liab yog cov ntawv nyias nyias ntawm tooj liab (li 2 hli lossis tsawg dua), thaum cov phaj tuab (txog 12 hli tuab). Feem ntau, cov no muaj nyob rau hauv ntau qib tooj liab. Cov nplooj ntawv yog cov malleable heev thiab tuaj yeem tsim rau hauv cov khoom sib txawv.
8. Oxygen-dawb tooj liab
Oxygen-dawb tooj liab yog yaj nyob rau hauv ib tug granulated graphite da dej kom tsis txhob muaj oxygen. Lawv yog cov purest tooj liab muaj, nrog tsawg impurities vim tsis-oxidizing tej yam kev mob. Nws cov hluav taws xob hluav taws xob siab thiab tsis muaj qhov tsis zoo ua rau nws tsim nyog siv rau hauv cov khoom siv hluav taws xob siab.
9. Electrolytic tooj liab
Electrolytic tooj liab yog refined los ntawm electrolysis nyob rau hauv ib tug tov kom tshem tawm impurities. Cov qib high-purity tooj liab no muaj hluav taws xob conductivity siab thiab yog li ntawd yog ua hauj lwm nyob rau hauv ntau yam hluav taws xob Cheebtsam xws li tsheb npav bar thiab windings.
Cov khoom ntawm tooj liab yog dab tsi?
Cov khoom ntawm ntau hom tooj liab muaj nyob rau hauv Table 1:
Table 1: Copper Properties
| Hom tooj liab | Kev sib xyaw | Cov khoom | Siv dav | Piv txwv |
|---|---|---|---|---|
|
Copper Tubing |
99.9% tooj liab, < 0.04% phosphorus |
Corrosion resistant, ductile |
Kev muab dej |
Cov kav dej hauv tsev |
|
tooj dag |
>60% tooj liab, Tsawg dua lossis sib npaug li 39% zinc |
Siab zog thiab ductility |
Cov kav dej, cov twj paj nruag |
Faucets, trumpets |
|
Bronze |
88% tooj liab, 12% tin |
Zoo heev ductility thiab corrosion kuj |
Static lubrication, seawater corrosion kuj |
Bushes thiab bearings, nkoj propellers |
|
Copper Nanoparticles |
Ntau yam |
Kev ua haujlwm siab catalytic, zoo dua kev ua haujlwm antimicrobial |
Kev kho hniav, kev ua liaj ua teb |
Kev cog hniav, tshuaj tua kab |
|
Dawb-Machining tooj liab |
99% tooj liab, < 0.5% sulfur, telluride |
Ntau dua machinability |
Machined Cheebtsam |
Vuam nozzles, soldering hlau tswv yim |
|
Oxygen-Free Copper |
99.99% tooj liab |
Zoo heev hluav taws xob conductivity |
Cov kws tshaj lij hluav taws xob |
Lub tshuab nqus tsev hluav taws xob ntau |
|
Electrolytic tooj liab |
99.9% tooj liab |
Zoo heev hluav taws xob conductivity |
Cov khoom siv hluav taws xob tseem ceeb |
Cov kab hauv av, cov npav npav |
Cov khoom ntawm txhua qib zoo sib xws, tab sis lawv qhov sib txawv ua rau muaj ntau yam kev siv.
Dab tsi yog Cov Khoom Siv Lub Cev ntawm Tooj?
Lub cev muaj zog ntawm ntau hom tooj liab muaj nyob rau hauv Table 2 hauv qab no:
Table 2: Copper Physical Properties
| Hom tooj liab | Qhov ceev (g / cm3) | Melting Point (zeeg) | Kub Point (degree) | Ductility | Thermal conductivity (W / mK) |
|---|---|---|---|---|---|
|
High purity copper (>99%) |
8.9 |
1,083 |
2,595 |
0.5 |
401 |
|
Dawb-machining tooj liab |
8.94 |
1,080 |
n/a |
n/a |
377 |
|
tooj dag |
8.73 |
930 |
1,100 |
n/a |
144 |
|
Bronze |
8.8 |
910 |
2,300 |
n/a |
189 |
Table Credit: https://www.lenntech.com/
Lub cev muaj zog nyob ntawm qhov feem pua ntawm tooj liab hauv cov khoom siv nrog rau cov ntsiab lus alloying
Dab tsi yog cov khoom siv tshuaj lom neeg ntawm tooj liab?
Cov tshuaj lom neeg ntawm tooj liab nyob ntawm qhov tseem ceeb ntawm nws lub xeev oxidation. Ob lub xeev oxidation uas feem ntau muaj yog Cu + thiab Cu2+. Table 3 hauv qab no muab qee yam tshuaj lom neeg ntawm cov khoom sib txuas thiab cov xwm txheej rau tooj liab:
Table 3: Cov khoom siv tshuaj lom neeg ntawm tooj liab
| Hom tooj liab | Reactivity | Oxidation muaj peev xwm (V) | Kev txo qis (V) | Solubility (KSP) | Corrosion Resistance |
|---|---|---|---|---|---|
|
Cu+ |
Unreactive (Hydrogen> Copper> Silver) |
-1 |
1 |
Insoluble (oxide) |
0.025 hli/y (seawater) |
|
Cu2+ |
Unreactive (Hydrogen> Copper> Silver) |
0 |
0.34 |
2.2 x 10-2 (hydroxide) |
0.025 hli/y (seawater) |
Cov khoom no yuav txawv rau txhua qhov tshwj xeeb tooj liab (xws li oxalates, sulfites, thiab sulfates.
Kev siv tooj liab yog dab tsi?
Kev siv tooj liab muaj nyob thoob plaws hauv lub neej txhua hnub. Cov npe hauv qab no yog qee qhov piv txwv:
1. Electronics
Tooj liab yog siv dav hauv electronics vim nws muaj hluav taws xob zoo heev. Nws tso cai rau cov tam sim no nqa mus rau ntawm cov ntu me me ntawm tooj liab piv rau txhuas, cia cov khoom siv tsawg dua, thiab cov khoom me me.
2. Kev tsim vaj tsev
tooj liab yog siv nyob rau hauv architecture rau ib tug aesthetically striking tsos. Nws tau siv los ua vov tsev thiab phab ntsa cladding, nrog rau cov kav dej thiab cov dej nag downspouts.
3. Cov kav dej
Copper tubing yog siv dav rau cov kav dej hauv tsev hauv tsev, vim nws qhov zoo heev corrosion kuj.
4. Kev thauj mus los
Copper yog siv dav hauv cov tsheb niaj hnub vim yog cov khoom siv hluav taws xob siv rau cov khoom siv hluav taws xob nyuaj. Raws li cov tsheb fais fab loj hlob hauv kev lag luam, cov tooj liab nce ntxiv yog siv rau cov khoom xws li hluav taws xob motors. Qhov no yog vim tooj liab zoo heev hluav taws xob conductivity, thib ob tsuas yog nyiaj.
5. Lub zog tauj dua tshiab
Tooj liab yog siv nyob rau hauv kev lag luam hluav taws xob tauj dua tshiab hauv ntau txoj hauv kev. Piv txwv li, cua turbines siv tooj liab nyob rau hauv lub generating turbines. Hnub ci photovoltaic vaj huam sib luag kuj xav tau tooj liab rau kev sib txuas thiab cable.
6. Cov khoom siv kho mob
Copper yog siv los ua txheej txheej ntawm cov khoom siv kho mob vim nws cov tshuaj tua kab mob. Ua li no, nws txo qhov kev pheej hmoo ntawm kev kis kab mob hauv cov neeg mob.
7. Cov Hluav Taws Xob Hluav Taws Xob
Tooj liab yog siv dav rau kev xaim hluav taws xob vim nws cov hluav taws xob zoo heev. Qhov hla ntu ntawm tooj liab yuav tsum tau nqa ib qho tam sim no zoo yog tsawg dua li lwm yam khoom siv tsim nyog xws li txhuas.
8. Npib
Tooj liab tau keeb kwm siv nyiaj npib rau ntau qhov laj thawj: nws yog malleable thiab yog li ntawd yooj yim stamped, tab sis tseem ruaj txaus kom muaj sia nyob hauv kev ncig. Nws kuj muaj antimicrobial zog thiab corrosion kuj.
9. Muaj Machinery
Tooj liab yog siv nyob rau hauv ntau txoj kev nyob rau hauv industrial cov khoom, nrog rau cov kev pab cuam xws li tooj liab tuag casting. Sib nrug los ntawm kev siv hluav taws xob xws li motors thiab cabling, nws kuj yog siv hauv cov khoom siv hluav taws xob xws li cov tub yees condensers. Nws kuj tseem tuaj yeem siv rau cov tshuaj tiv thaiv tshwj xeeb.
Cov txiaj ntsig ntawm tooj liab yog dab tsi?
Tooj liab muaj ntau cov txiaj ntsig meej uas tau teev tseg hauv qab no:
Muaj cov khoom siv hluav taws xob zoo heev, thib ob tsuas yog nyiaj, ua rau nws siv dav tshaj plaws rau cov khoom siv hluav taws xob thiab hluav taws xob thoob ntiaj teb.
Nws muaj thermal conductivity zoo heev, thiab yog li ntawd yog siv nyob rau hauv lub tshav kub exchangers, xws li condensers nyob rau hauv tub yees thiab cua txias units.
Yog corrosion-resistant, tshwj xeeb tshaj yog nyob rau hauv dej thiab seawater daim ntaub ntawv, uas tau coj mus rau nws dav siv nyob rau hauv cov kav dej kav dej rau cov kav dej.
Yog ductile thiab tuaj yeem khoov tau yooj yim. Nws yog ib qho yooj yim rau kev ua hauj lwm nrog hauv cov kav dej thiab hauv cov cabling.
Nws yog cov tshuaj tua kab mob, uas tuaj yeem siv tau zoo hauv kev xa dej, nrog rau kev siv tshuaj kho mob los tiv thaiv kev noj qab haus huv ntawm cov neeg mob.
Cov txiaj ntsig kev noj qab haus huv ntawm tooj liab yog dab tsi?
Copper yog ib qho ntxhia ntxhia uas yog qhov tseem ceeb rau tib neeg kev noj qab haus huv hauv qhov tsawg heev. Tooj liab plays ib feem hauv lub cev los ntawm kev txhawb nqa kev nqus hlau, koom nrog hauv kev tsim cov qe ntshav liab, nrog rau kev tsim cov collagen. Nws yog to taub los txhim kho kev ua haujlwm ntawm lub cev tiv thaiv kab mob.
Kev tshawb fawb ntxiv yog xav tau, tab sis muaj qee qhov qhia tias tooj liab tuaj yeem txhim kho pob txha pob txha (cov pob txha tsis tshua muaj), thiab muaj cov kev xav tsis zoo uas siv cov hlua tooj liab tuaj yeem siv los txo qhov mob ntawm pob qij txha los ntawm kev mob caj dab.
Cov khoom noj uas muaj tooj liab muaj xws li nplooj ntsuab, tag nrho cov nplej, txiv ntseej, thiab noob. Cov khoom noj tshwj xeeb uas muaj tooj liab yog oysters, shiitake nceb, qos yaj ywm qab zib, thiab tsaus chocolate.
Dab tsi yog qhov txwv ntawm tooj liab?
Copper muaj ntau qhov kev txwv, qee qhov ntawm cov npe hauv qab no:
Nws kuj kim heev piv rau lwm yam khoom siv xws li: txhuas (hluav taws xob cable) lossis yas (dej kav dej).
Nws kuj hnyav piv rau cov ntaub ntawv xws li txhuas, yog li rau cov xov hlau nyiaj siv ua haujlwm, nws yuav tsis ua tau.
Oxidizes, tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias, thiab yog li muaj lub neej luv luv yog tias raug huab cua.
Tshaj tawm qhov kev pheej hmoo poob siab piv rau lwm lub teeb liab kis tau tus mob ntawm fiber ntau optics.
Muaj tshuaj lom ntau heev, yog li nws tsis tuaj yeem siv tau qhov kev noj cov tooj liab tsis tu ncua, xws li hauv cov tais diav.
Puas yog tooj liab xeb yooj yim?
tooj liab tsis technically xeb, vim xeb yog hlau oxide thiab tsis muaj hlau nyob rau hauv tooj liab. Txawm li cas los xij, tooj liab muaj qee qhov kev txwv qhov chaw corrosion. Copper feem ntau suav hais tias yog corrosion-resistant. Nws ib txwm muaj xim liab-xim av, uas yog vim qhov tsim ntawm tooj liab oxide passivation zaj duab xis ntawm cov hlau nto. Sij hawm dhau mus, ntsuab tooj liab carbonate ua rau saum npoo raws li tooj liab oxide reacts nrog dej thiab carbon dioxide nyob rau hauv cov huab cua.
Puas yog tooj liab muaj tshuaj lom rau tib neeg?
Yog lawm, tooj liab tuaj yeem ua rau tib neeg muaj tshuaj lom nyob rau hauv cov ntsiab lus tseem ceeb. Tooj liab yog ib qho tseem ceeb ntawm cov pob zeb hauv av rau tib neeg kev noj qab haus huv, tab sis yog tias muaj ntau tshaj ntawm tooj liab, muaj ntau yam teeb meem tshwm sim. Cov ntshav siab ntau ntawm tooj liab yog txuas nrog Alzheimer's disease thiab qee hom qog nqaij hlav xws li mob qog noj ntshav thiab lub ntsws. Tus mob tooj liab lom yog tsawg heev tab sis tuaj yeem tshwm sim yog tias nqus tau ntau heev. Qhov no tuaj yeem ua rau tuag taus vim tsis ua haujlwm ntawm lub cev xws li lub siab thiab lub raum pib tshwm sim.
Puas yog tooj liab yog hlau?
Yog, tooj liab yog hlau. Nws tseem suav tias yog cov hlau hnyav vim nws qhov ntom ntom ntom. Yog xav paub ntxiv, saib peb phau ntawv qhia txog Metalloids.
Qhov txawv ntawm tooj liab thiab hlau yog dab tsi?
Tooj liab yog ib qho ntawm ntau tshaj 90 lub ntsiab hlau. Tooj liab yog hlau, tab sis ntau cov hlau txawv heev ntawm tooj liab. Lwm cov hlau sib txawv ntawm lawv cov xim; Cov hlau feem ntau yog dawb lossis grey, tab sis tooj liab yog xim liab-xim av. Lwm cov hlau tuaj yeem sib txawv ntawm lawv lub cev thiab tshuaj lom neeg-nqus thiab nkig ntau dua li tooj liab, thiab lawv feem ntau tsis ua cua sov lossis hluav taws xob yooj yim.
Qhov txawv ntawm tooj liab thiab txhuas yog dab tsi?
Tooj thiab txhuas yog ob hom hlau sib txawv nrog cov khoom sib txawv. Qhov pom tseeb tshaj plaws qhov sib txawv yog xim: tooj liab yog xim liab-xim av thaum txhuas yog dull silvery grey. Tooj liab muaj lub zog tensile ntau dua li txhuas thiab zoo dua hluav taws xob thiab thermal conductivity.
Qhov txawv ntawm tooj liab thiab tooj dag yog dab tsi?
Brass yog ib qho alloy ntawm feem ntau tooj liab thiab zinc. Cov tooj dag yog li ntawd txawv ntawm tooj liab vim nws suav nrog lwm yam hlau. Brass tuaj yeem suav nrog cov hlau ntxiv xws li tin, txhuas, txhuas, lossis manganese hauv cov nqi me me kom ua tiav cov khoom tshwj xeeb.
Cov ntsiab lus
Kab lus no nthuav qhia tooj liab, piav qhia nws yog dab tsi, thiab tham txog ntau yam kev siv tooj liab. Yog xav paub ntxiv txog tooj liab, hu rau Xometry tus neeg sawv cev.
Xometry muab ntau yam kev tsim muaj peev xwm thiab lwm yam kev pabcuam ntxiv rau txhua yam ntawm koj cov qauv tsim thiab kev xav tau ntau lawm. Mus saib peb lub vev xaib kom paub ntau ntxiv lossis thov kom tau txais kev tsocai pub dawb, tsis muaj kev lav phib xaub.
Tsis lees paub
Cov ntsiab lus tshwm sim ntawm nplooj ntawv web no yog rau cov ntaub ntawv xov xwm nkaus xwb. Xometry ua rau tsis muaj kev sawv cev lossis kev lees paub ntawm txhua yam, txawm hais tias nws qhia lossis qhia, raws li qhov raug, ua tiav, lossis siv tau ntawm cov ntaub ntawv. Ib qho kev ua haujlwm tsis zoo, geometric tolerances, cov qauv tsim tshwj xeeb, zoo thiab cov khoom siv, lossis cov txheej txheem yuav tsum tsis txhob raug suav hais tias yog dab tsi yuav raug xa los ntawm lwm tus neeg muab khoom lossis cov tuam txhab los ntawm Xometry lub network. Cov neeg yuav khoom nrhiav quotes rau qhov chaw yog lub luag haujlwm rau kev txhais cov kev cai tshwj xeeb rau cov khoom ntawd. Thov xa mus rau peb cov nqe lus thiab cov xwm txheej kom paub ntau ntxiv.
