C21000 Copper Alloy Tube rau Welded Thaum tshav kub kub Exchangers
C21000 yog tooj liab wrought-zinc alloy uas muaj 94 - 96% tooj liab nrog qhov sib npaug zinc, uas tso rau hauv gilding hlau tsev neeg es tsis yog nyob rau hauv siab - zog tooj dag lossis phosphorus deoxidised pawg. Qhov kev sib txawv no tseem ceeb thaum cov khoom siv tau teev tseg rau welded heat exchanger tubing, vim hais tias cov khoom uas tsav cov txheej txheem vuam los ntawm cov ntsiab lus tooj liab thiab qib zinc qis heev, tsis yog los ntawm deoxidation ntxiv. Nrog tsuas yog li 5% zinc, cov alloy khaws feem ntau ntawm cov thermal thiab hluav taws xob kev ua tau zoo ntawm tooj liab thaum muaj zog, ruaj khov nto zaj duab xis thiab zoo dua machining tus cwj pwm.
Cov phab ntsa tuab hauv qib no yog xaiv qhov twg lub raj yuav tsum muaj kev tiv thaiv corrosion, nqus thermal txav, los yog npaj rau kev sib koom ua ke los yog nthuav dav rau hauv cov ntawv raj. Lub phab ntsa hnyav ua rau qhov poob ntawm ntu hauv kev ua haujlwm nruj me ntsis thiab muab cov welder txaus hlau ua haujlwm nrog thaum lub raj txuas mus rau lub taub hau lossis thaum lub stub yog welded rau hauv manifold.
Qib Identity, Composition thiab Standards
Cov kev txwv muaj nyob hauv qab no yog cov lej uas tus neeg yuav khoom yuav tsum tau kuaj xyuas daim ntawv pov thawj zeb. Lawv kuj daws cov lus nug naming: nrog phosphorus tuav rau 0.01% siab tshaj plaws, cov hlau tsis tuaj yeem yog phosphorus deoxidised tooj liab, thiab nrog tooj liab ntawm 94% yam tsawg kawg nws tsis yog siab - zog tooj dag.
| Element | Cov ntsiab lus, hnyav% |
|---|---|
| Copper (Cu) | 94 – 96 |
| Zinc (Zn) | Tshuav |
| Lead (Pb) | 0.05 max |
| Hlau (Fe) | 0.05 max |
| Phosphorus (P) | 0.01 max |
| Lwm cov ntsiab lus, tag nrho | 0.10 max |
Flat thiab dov cov khoom nyob rau hauv qib no yog txiav txim rau ASTM B36 / B36M, thiab qhov sib npaug wrought tooj liab alloy tsim tau teev nyob rau hauv GB / T 5231, qhov twg 95% tooj liab tooj dag yog sau H95. Vim hais tias cov khoom yog ib tug tsawg-zinc alloy, nws yog ua nyob rau hauv tib lub ntau lawm txoj kev raws li lwm yam wrought tooj liab alloys: casting, kub ua hauj lwm, txias dov los yog kos duab, thiab ib tug zaum kawg anneal rau tus txiav txim npau taws.
Lub cev muaj zog
| Khoom | Tus nqi |
|---|---|
| Qhov ntom | 8.86-8.94 g / cm33 |
| Melting point | 1049 degree |
| Hluav taws xob conductivity, annealed | 80-85% IAB |
| Thermal conductivity | Hauv qab ntawm electrolytic tawv pitch tooj liab, thiab ua raws li cov hluav taws xob conductivity saum toj no |
Cov ntaub ntawv ceeb toom: cov hluav taws xob thiab thermal conductivity ntawm tooj liab-zinc alloy poob ua ke raws li zinc ntxiv. Cov duab nyob ze 391 W/(m·K) muaj nyob rau hauv siab -purity tooj liab xws li C11000, tsis yog rau 95Cu-5Zn wrought alloy, yog li cov lus hais thermal conductivity ntau yam uas spans ob qhov tseem ceeb yuav tsum tsis txhob siv rau kev hloov pauv kub. Rau lub luag hauj lwm exchanger lub 80 - 85% IACS annealed tus nqi nyob rau hauv lub rooj saum toj no yog qhov kev ntseeg tau hais tias, thiab cov thermal conductivity ua raws li cov qauv piv rau tooj liab.
Mechanical Properties los ntawm Temper
| Qhov xwm txheej | Tensile zog | Yield zog | Elongation | Hardness |
|---|---|---|---|---|
| Annealed | 220-290 MPa | 69-100 MPa | 35 – 45 % | 40-60 HV |
| Ua haujlwm txias, H01 | 255-325 MPa | 200-250 MPa | 20 – 30 % | 50-70 HV |
| Ua haujlwm txias, H04 | 345-405 MPa | 300-350 MPa | 10 – 15 % | 80-100 HV |
Cov mob annealed yog qhov kev xaiv ib txwm rau tubing uas yuav nthuav dav rau hauv cov ntawv raj lossis tsim tom qab xa khoom, vim nws khaws cov ductility xav tau rau cov haujlwm ntawd. Cov kev ua haujlwm txias txias yog siv rau qhov twg lub raj yog cov qauv tsim thiab qhov twg lub zog tawm los ntau dua tso cai rau cov qauv kev txhawb nqa sib zog, ntawm tus nqi ntawm kev tsim nyiaj.
Tube Dimensions, Cov Khoom Muag Khoom thiab Daim Ntawv Thov
| Daim ntawv | Thickness / txoj kab uas hla | Dav |
|---|---|---|
| Tube, tuab phab ntsa | Phab ntsa 1 - 20 mm, sab nraud txoj kab uas hla 10 - 200 mm | Tsis siv tau |
| Daim ntawv / strip | 0.5-10 hli | 100-600 hli |
| Qws / bar | Txoj kab uas hla 5 - 50 mm | Tsis siv tau |
| Hlau | Txoj kab uas hla 0.5-10 mm | Tsis siv tau |
Lengths feem ntau txiav rau cov neeg siv khoom xav tau ntau dua li tuav rau qhov ntev ntawm cov khoom lag luam, uas haum rau cov khoom sib pauv rov tsim dua qhov twg lub raj ntev yog teem los ntawm lub plhaub thiab lub taub hau geometry.
Thaum tshav kub kub hloov:Thaum tshav kub kub exchangers, seawater piping, condensers thiab txheej txheem coolers tuav me ntsis aggressive kua
Hluav taws xob systems:connectors, busbars thiab semiconductor Cheebtsam
Marine engineering:nkoj fittings, seawater kab thiab offshore cua turbine infrastructure
Mechanical Cheebtsam:li qub, bearings thiab rivets
Cov khoom siv tshuaj:corrosion resistant tanks, twj thiab pipework
Fabrication, Welding thiab Service Considerations
Lub alloy yog yooj yim txias thiab kub tsim, forged thiab welded. Rau kev ua haujlwm kub, qhov kub ntawm 730 - 850℃yog siv, nrog rau kev saib xyuas ntawm ntug kev tawg ntawm sab saum toj ntawm ntau yam; annealing yog nqa tawm ntawm 540 thiab 600℃los kho cov ductility. Vuam yog ib txwm ua los ntawm cov txheej txheem tungsten inert gas nrog tag nrho cov inert gas shielding, thiab cov cua sov tawm tswv yim yog tswj kom tsis txhob dhau - cua sov cheeb tsam sib koom ua ke, uas yuav coarsen tus qauv thiab txo toughness.
Nyob rau sab corrosion, cov ntsiab lus zinc tsawg yog qhov zoo dua. Dezincification yog ib qho kev pheej hmoo uas loj hlob nrog zinc qib hauv tooj liab-zinc alloy, yog li 95% tooj liab qib tsis tshua muaj ntau dua li 60/40 tooj dag nyob rau hauv tib tsev neeg, thiab cov khoom tsim muaj kev tiv thaiv zaj duab xis nyob rau hauv ntau qhov chaw lag luam thiab dej hiav txwv. Cov qib tseem muaj kev txwv: muaj zog chlorinated los yog siab - dej hiav txwv ceev, ammonia- bearing media thiab acidic condensates tuaj yeem tawm tsam nws, thiab lub raj loj thiab ntws nrawm yuav tsum raug xaiv kom yaig tsis yog qhov kev tswj xyuas kev puas tsuaj.
Tus cwj pwm tus nqi kuj tseem cuam tshuam. Cov alloy sib npaug lub zog tensile uas muaj peev xwm ncav cuag 405 MPa nyob rau hauv lub txias ua hauj lwm mob nrog ib tug elongation ntawm 10 - 15% nyob rau hauv tib lub npau taws, yog li nws muaj peev xwm hloov ntau kim corrosion resistant alloys nyob rau hauv cov ntaub ntawv uas lub luag hauj lwm yog nruab nrab, thaum muab lub zog zoo dua cov ntshiab tooj liab qib uas yuav txwv tsis pub xaiv rau conductivity.
Cov lus nug nquag
Q: Dab tsi alloy yog C21000?
C21000 yog tooj liab wrought-zinc alloy nrog 94 - 96% tooj liab thiab qhov sib npaug zinc, hu ua gilding hlau. Tej zaum nws yog mislabelled li phosphorus deoxidised tooj liab los yog ib tug siab - zog tooj dag, tab sis cov chemistry txoj cai ob leeg tawm: phosphorus yog txwv rau 0.01 % siab tshaj plaws, thiab tooj liab ntawm 94 % yam tsawg kawg nkaus nws nyob rau hauv qis -zinc kawg ntawm tsev neeg tooj dag.
Q: Vim li cas thiaj siv cov phab ntsa tuab hauv lub tshav kub exchanger?
Lub phab ntsa hnyav muab kev tiv thaiv corrosion yog li lub raj mus txog nws lub neej tsim txawm tias tsis tshua muaj ntog, muab cov seem txaus rau kev nthuav dav lossis vuam rau hauv cov ntawv raj, thiab tiv thaiv cov bending loads los ntawm thermal txav. Nws kuj tseem tso cai rau lub raj kom rov- dov los yog re-welded thaum lub sij hawm kho yam tsis tau poob qis hauv qab phab ntsa yam tsawg kawg nkaus.
Q: Cov qauv twg npog C21000 cov khoom?
Flat thiab dov cov khoom raug txiav txim mus rau ASTM B36 / B36M, thiab cov khoom siv tooj liab wrought yog teev nyob rau hauv GB / T 5231 raws li 95% tooj liab tooj liab. Cov kev txwv tsis pub siv yog 94 - 96% tooj liab, 0.05% siab tshaj txhuas, 0.05% siab tshaj hlau thiab 0.01% siab tshaj phosphorus.
Q: C21000 tubing yuav tsum tau welded li cas?
Tungsten inert gas welding nrog inert gas shielding yog cov txheej txheem ib txwm muaj, nrog rau cov cua sov input tswj los tiv thaiv brittleness nyob rau hauv lub sib koom tes thiab tshav kub cuam tshuam cheeb tsam. Preheating thiab interpass kub tswj ua raws li qhov kub ua hauj lwm ntau ntawm 730 - 850 degree, thiab tej yam txias ua hauj lwm raj feem ntau annealed ntawm 540 thiab 600℃tom qab tsim.
Q: Puas yog C21000 haum rau kev pabcuam dej hiav txwv?
Nws cov ntsiab lus zinc tsawg ua rau dezincification txaus ntshai hauv qab ntawm qhov siab dua -zinc brasses, yog li nws ua tau zoo nyob rau hauv marine thiab industrial atmospheres. Qhov twg qhov nruab nrab cua txias yog qhov siab tshaj plaws hauv dej hiav txwv lossis muaj cov tshuaj chlorides hnyav, lub raj loj, phab ntsa tuab thiab ntws nrawm yuav tsum tau tshuaj xyuas ua ke, thiab qib tooj liab nickel yuav yog qhov kev xaiv zoo dua.
Q: Cov khoom dab tsi ua rau nws muaj txiaj ntsig rau kev sib pauv thiab hluav taws xob ua haujlwm?
Lub annealed temper muab 80 - 85% IACS hluav taws xob conductivity thiab lub zog tensile ntawm 220 - 290 MPa; Kev ua haujlwm txias ua rau lub zog tensile rau 345 - 405 MPa nrog 80 - 100 HV hardness thaum khaws 10 - 15% elongation. Qhov kev sib xyaw ua ke no txhawb nqa ob qho khoom nqa tam sim no thiab cov khoom siv hluav taws xob hloov hluav taws xob yam tsis muaj tus nqi ntawm cov kws tshaj lij alloy.
