5083 Alloy thiab H Temper System
5083 yog ib qho txhuas-magnesium alloy muaj 4.0-4.9 feem pua magnesium nrog manganese thiab chromium ntxiv, thiab nws yog cov ntaub ntawv alloy rau marine aluminium. Nws tsis tuaj yeem ua kom muaj zog los ntawm kev kho cua sov, yog li nws cov khoom raug teeb tsa los ntawm kev sib zog ua kom tawv nqaij thiab thermal stabilization, ob qho tib si tau piav qhia los ntawm H temper system. Cov ntsiab lus npau taws ua raws EN 515, thiab cov cuab yeej yuav tsum tau ua rau coil thiab phaj tau muab rau hauv ASTM B209 rau cov hom phiaj dav dav thiab ASTM B928 rau marine tempers.
Plaub tempers uas tseem ceeb ua lag luam yog H111, H116, H112 thiab H321. Lawv tsis tuaj yeem hloov pauv tau: ob ntawm lawv nqa qhov yuav tsum tau kuaj corrosion rau kev pabcuam dej hiav txwv thiab ob tsis ua.
Temper los ntawm Temper
H111: strain hardened, ces ib nrab annealed. Nws yog qhov softest ntawm kev ua hauj lwm tempers, nrog siab ductility thiab nruab nrab lub zog, thiab yog siv qhov twg ib feem yuav tsum tau tsim heev thiab lub siab tshaj plaws lub zog yog tsis xav tau.
H116: strain hardened thiab thermally stabilized tshwj xeeb rau marine kev pab cuam, nrog yuav tsum tau kuaj rau intergranular thiab exfoliation corrosion kuj. Nws yog ib txwm npau taws rau hull plating hauv kev sib cuag dej hiav txwv txuas ntxiv.
H112: kub ua haujlwm thiab tom qab ntawd muab kev tswj hwm kev ua haujlwm lossis kev kho cua sov kom tau raws li cov khoom teev tseg. Nws cov khoom tau lees paub yog qis dua H111 hauv qee qhov tuab, tab sis nws tau nkag rau hauv qhov dav dav ntawm cov ntsuas hnyav.
H321: strain hardened thiab stabilized nrog ib tug xyaum npaj los tiv thaiv kev nyuaj siab corrosion cracking, dav teev rau hulls, tso tsheb hlau luam thiab structural phaj.
Mechanical Properties muab piv
Qhov tsawg kawg nkaus qhov tseem ceeb hauv qab no yog qhov yuav tsum tau txais ntawm ASTM B209 thiab ASTM B928 rau cov tuab tuab feem ntau muab los ua cov kauj thiab phaj.
| Kub | Tensile zog | 0.2% pov thawj muaj zog | Elongation | Kev kuaj corrosion |
|---|---|---|---|---|
| 5083-H111 | 275 MPa min | 125 MPa min | 12% min | Tsis xav tau |
| 5083-H112 | 275 MPa min | 125 MPa min | 12% min | Tsis xav tau |
| 5083-H116 | 305 MPa min | 215 MPa min | 12% min | Intergranular thiab exfoliation |
| 5083-H321 | 305 MPa min | 215 MPa min | 12% min | Intergranular, exfoliation, kev nyuaj siab corrosion |
Qhov sib txawv ntawm ob khub yog qhov tseem ceeb hauv cov ntsiab lus tsim. Xaiv H116 lossis H321 es tsis yog H112 tso cai rau lub coil nyias lossis phaj rau tib lub thauj khoom, uas txo qhov hnyav hauv lub nkoj lossis txoj kev tsheb thauj khoom. Tawm tsam qhov ntawd, cov stabilized tempers yog tsawg formable thiab muab khoom nyob rau hauv ib tug nqaim thickness ntau.
Corrosion Cwj Pwm thiab Vim Li Cas Stabilization Matters
Thaum lub siab -magnesium alloy tuav nyob rau hauv ib puag ncig sov, magnesium tuaj yeem txav mus rau cov ciam teb nplej thiab tsim ib ntus, anodic theem nyob ntawd. Nyob rau hauv qhov xwm txheej rhiab heev, raug dej hiav txwv ua rau ciam teb tawg, thiab cov khoom tsis ua haujlwm los ntawm kev sib tsoo los yog, nyob rau hauv kev ntxhov siab, los ntawm kev ntxhov siab corrosion tawg. Cov kev coj ua ruaj khov siv rau H116 thiab H321 yog tsim los ua kom cov magnesium nyob rau hauv cov kev daws teeb meem kom qhov no tsis tshwm sim, thiab cov kev ntsuam xyuas corrosion hauv ASTM B928 muaj los ua pov thawj tias kev xyaum ua haujlwm.
Cov txiaj ntsig zoo rau cov neeg siv:
Tsis txhob hloov H112 los yog H111 rau lub siab ruaj khov nyob rau hauv cov qauv uas yuav immersed los yog tsis tu ncua wetted.
Tsis txhob cia qhov kub ntawm qhov kev pab cuam nce siab tshaj qhov kev kub ntxhov uas tsim nyog; metallurgical mob tsis tas mus li ntawm qhov kub thiab txias.
Tsis txhob welding nrog cov cua kub ntau dhau, vim tias cov cua sov- thaj tsam cuam tshuam tsuas yog nyob deb npaum li cov txheej txheem tsim nyog tso cai.
Khaws coil thiab phaj kom qhuav thiab tawm ntawm lub hnub ncaj qha uas lawv yuav tuav tau ntev ua ntej kev tsim khoom.
Xaiv Temper los ntawm Daim Ntawv Thov
| Daim ntawv thov | Ib txwm npau taws | Yog vim li cas |
|---|---|---|
| Hull plating thiab hauv qab plhaub | H116 los yog H321 | Nruam immersion, xav tau stabilized corrosion kuj |
| Decks thiab superstructures saum toj no waterline | H112 los yog H321 | Lub zog nrog zoo weldability thiab sib sau |
| Tsim thiab nias Cheebtsam | H111 los yog O | High ductility rau kev sib sau hnyav |
| Cryogenic tanks thiab khoom siv | O lub H112 | Toughness ntawm qis kub nrog zoo elongation |
| Txoj kev tankers thiab cov hlab ntsha siab | H111 los yog H321 | Sib npaug ntawm lub zog, weldability thiab corrosion kuj |
| Shipyard structural phaj nyob rau hauv uas tsis yog -immersed cheeb tsam | H112 | Wide gauge muaj thiab yooj yim fabrication |
Fabrication thiab Ordering Notes
Tag nrho plaub lub tempers yog welded nrog 5183 los yog 5356 muab tub lim rau AWS A5.10, thiab tag nrho cov poob zog nyob rau hauv lub tshav kub- cuam tshuam cheeb tsam. Yog li ntawd, qhov sib koom ua ke yog tsim los ntawm cov khoom siv welded, thiab cov txheej txheem fabrication yuav tsum yog ib qho tsim nyog raws li cov cai hauv zej zog kev faib tawm, nrog rau cov khoom siv hluav taws xob khaws cia hauv qhov kev sim ntau yam. Kev txwv tsis pub sib txawv: H111 siv lub nruj tshaj plaws khoov radii, H112 yog nruab nrab, thiab cov tempers stabilized yuav tsum tau tsim nrog dav radii thiab, qhov twg ua tau, hla txoj kev dov.
Thaum txiav txim, lub npau taws yuav tsum tau teev ua ke nrog tus qauv, vim hais tias tib lub npe alloy piav txog plaub yam khoom sib txawv. Daim ntawv xaj yuav tsum tseem hais txog thickness, dav, ntev los yog coil hauv txoj kab uas hla, qhov yuav tsum tau flatness, seb puas yuav tsum tau kuaj ultrasonic, thiab cov ntaub ntawv pov thawj ntawm cov ntaub ntawv soj ntsuam. Coil yog muab nyob rau hauv thickness ntawm 0.5 hli mus rau 6 hli, thaum phaj txuas ntawm 6 hli mus rau tshaj 100 hli, nyob rau hauv dav txog li 2500 hli thiab ntev mus txog 12000 hli. Txhua qhov khoom xa tuaj yog cim nrog cov hlau, qhov kub thiab txias, cov xov tooj cua sov thiab qhov ntev, thiab muab nrog daim ntawv pov thawj zeb kuaj qhia txog cov txiaj ntsig ntawm cov tshuab thiab, rau qhov ruaj khov tempers, cov txiaj ntsig kev kuaj corrosion.
Cov lus nug nquag
Q: Qhov txawv ntawm H111 thiab H112 yog dab tsi?
A: H111 yog strain hardened thiab ces ib nrab annealed, uas muab siab ductility. H112 yog qhov kev xaiv rau kub- cov khoom ua haujlwm uas tsuas yog ua haujlwm txaus lossis kev kho cua sov kom tau raws li cov khoom teev tseg, thiab nws yog siv rau cov phaj hnyav.
Q: Vim li cas H116 tau teev tseg rau lub plhaub plating?
A: H116 yog strain hardened thiab thermally stabilized rau seawater kev pab cuam thiab yuav tsum xeem dhau intergranular thiab exfoliation corrosion xeem. Nws kuj muaj qhov tsawg kawg nkaus tensile thiab cov ntaub ntawv pov thawj muaj zog tshaj H112, yog li nws yog ob qho tib si muaj zog thiab ruaj khov nyob rau hauv immersion.
Q: Puas tuaj yeem siv H112 hloov H321?
A: Tsuas yog rau cov qauv uas tsis yog -immersed. H112 muaj kev lav phib xaub qis dua thiab tsis nqa qhov kev ntsuam xyuas corrosion thiab kev ntxhov siab uas H321 xav tau, yog li hloov nws hauv lub nkoj lossis lub tank yuav tsis ua raws li qhov yuav tsum tau ua hauv hiav txwv.
Q: Ua li cas cov tempers cuam tshuam vuam?
A: Tag nrho plaub qhov vuam nrog 5183 lossis 5356 muab tub lim thiab tag nrho cov poob lub zog nyob rau hauv tshav kub - cuam tshuam cheeb tsam. Cov txheej txheem tsim nyog thiab kev txwv cov cua sov yog tib yam, tab sis cov khoom ntawm niam txiv sib txawv, yog li kev sib koom ua ke yuav tsum siv cov nqi niam txiv raug.
Q: Cov tempers twg muaj nyob rau hauv daim ntawv coil?
A: Coil feem ntau yog muab rau hauv H111, H112, H116 thiab H321 los ntawm 0.5 hli mus rau 6 hli tuab, nrog phaj saum toj ntawd; widths ncav cuag 2500 mm thiab ntev mus txog 12000 mm rau phaj.
