Ob Magnesium Alloys Tom Qab Kev Tsim Nkoj Niaj Hnub No
Aluminium phaj xaiv rau lub nkoj ncaj qha cuam tshuam rau kev nyab xeeb ntawm lub nkoj, durability thiab kev khiav hauj lwm nqi. Ntawm 5xxx tsev neeg, ob lub alloys account rau feem ntau cov nkoj tsim kev thov: 5052, nruab nrab -lub zog cov khoom siv lub hom phiaj, thiab 5083, siab dua - lub zog marine phaj. Ob leeg yog aluminium-magnesium alloys uas vam khom magnesium hauv cov tshuaj muaj zog rau lub zog thiab ntawm qhov chaw ruaj khov oxide rau kev tiv thaiv corrosion, thiab ob qho tib si muaj kev pom zoo los ntawm kev faib pawg xws li Lloyd's Register thiab RINA.
Kev xaiv ntawm lawv yog ib lo lus nug ntawm qhov twg lub phaj zaum hauv cov qauv. Tsis yog-load-cov kabmob xws li superstructures, sab hauv fittings thiab lawj npog feem ntau yog 5052, thaum lub plhaub hauv qab, lub lawj lub zog thiab cov khoom hnyav hnyav feem ntau yog 5083.
5052 Aluminium Phaj
5052 muaj nyob ib ncig ntawm 2.5% magnesium nrog ib qho ntxiv chromium thiab yog lub hom phiaj dav dav tshaj plaws Al-Mg ntawv. Nws combines nruab nrab lub zog nrog zoo heev corrosion kuj, zoo heev formability thiab txhim khu kev qha weldability.
Tsawg ceev ntawm li 2.7 g / cm3 txo lub cev hnyav thiab txhim kho roj efficiency
Kev tiv thaiv zoo rau cov dej hiav txwv thiab cov huab cua tsis zoo, tsim nyog rau cov khoom siv hauv nkoj
Yooj yim rau nias, yob thiab khoov rau hauv cov duab nyuaj
Muab nyob rau hauv H32, H34 thiab H112 tempers, nrog O rau kev loj hlob
Cov ntawv thov: superstructures, decks, tso tsheb hlau luam, ducting, tsis yog -load-cov qauv kabmob
Nyob rau hauv H32 temper 5052 yog ib txwm teev nrog lub zog tensile ntawm yam tsawg kawg nkaus 215 MPa thiab 0.2% pov thawj kev ntxhov siab ntawm yam tsawg kawg nkaus 160 MPa, nrog elongation zoo tshaj 7%, ntsuas tawm tsam cov cai ntawm ASTM B209. H32 temper yog tsim los ntawm strain hardening thiab ib nrab annealing, uas muab ib tug zoo sib npaug ntawm lub zog thiab formability.
5083 Aluminium Phaj
5083 nce cov ntsiab lus magnesium rau kwv yees li 4.5% thiab ntxiv cov manganese, uas txhawb nqa lub zog thiab hardness rau hauv ntau yam uas feem ntau cuam tshuam nrog lub siab - lub zog ntawm cov qauv hlau thaum khaws cov weldability.
Lub zog tawm los tuaj yeem ncav cuag ib ncig ntawm 275 MPa nyob rau hauv lub siab siab, zoo tshaj 5052
Kev tiv thaiv zoo heev rau cov dej hiav txwv thiab cov chaw ua lag luam, suav nrog thaj chaw welded
Khaws lub zog tom qab vuam vim nws tsis yog cua sov- kho tau
Muaj nyob rau hauv O, H111, H112, H116 thiab H321 tempers rau marine lug
Daim ntawv thov: hull plating, lub zog decks, bulkheads, tso tsheb hlau luam, offshore qauv
5083 nyob rau hauv H116 mob yog teev nrog lub zog tensile yam tsawg kawg nkaus ntawm 305 MPa thiab qhov tsawg kawg nkaus pov thawj kev nyuaj siab ntawm txog 215 MPa, nrog exfoliation thiab intergranular corrosion yuav tsum tau los ntawm ASTM B928. Qhov kev xav tau corrosion yog dab tsi cais marine- cov phaj tsim nyog los ntawm cov khoom lag luam zoo ib yam.
Daim ntawv pov thawj, kev sib piv thiab khoom siv ntau yam
| Yam khoom | 5052 | 5083 |
|---|---|---|
| Magnesium cov ntsiab lus | txog 2.5% | 4.0-4.9% |
| Hom tensile zog | 215 MPa thiab siab dua (H32) | 275-305 MPa thiab siab dua (H116) |
| Tej pov thawj kev nyuaj siab | 160 MPa thiab siab dua | 215-275 MPa |
| Formability | Zoo heev | Zoo |
| Corrosion kuj | Zoo heev | Zoo heev |
| Tus nqi txheeb ze | qis | Siab dua |
Cov phaj yog muab los ntawm 3 hli mus rau 6 hli tuab nyob rau hauv txias- dov daim ntawv mus txog li 2200 mm dav, thiab los ntawm 6 mm mus rau 40 mm tuab nyob rau hauv kub- dov daim ntawv mus txog li 2500 mm dav, txiav kom ntev raws li xav tau. Lloyd's Register thiab RINA kev pom zoo tau tso cai tawm tsam lub zej zog tus kheej txoj cai rau cov ntaub ntawv txhuas, thiab txhua qhov kev xa khoom yog nrog rau daim ntawv pov thawj tshuaj xyuas rau EN 10204 3.1 nrog rau cov xov tooj cua sov traceability.
Fabrication thiab Quality Control
Ob leeg alloys yog welded nrog 5xxx muab tub lim hlau, thiab cov txheej txheem yuav tsum tsim nyog rau lub thickness thiab txoj hauj lwm siv nyob rau hauv lub nkoj. Kev sib sau txias yog nqa tawm ntawm qhov ntsuas kub vim tias kev ua haujlwm txias dhau los ua raws li kev pabcuam ntawm qhov kub siab tuaj yeem ua rau cov khoom siv rau kev ntxhov siab corrosion; qhov twg yuav tsum tau tsim kom loj, ib qho annealed temper yog siv thiab ib feem yog tom qab stabilized.
Kev tswj xyuas zoo ntawm kev txiav txim ntawm nkoj nkoj ib txwm suav nrog kev tshuaj xyuas tshuaj, kev ntsuas tensile thiab cov txiaj ntsig, ntsuas elongation, ntsuas qhov ntev thiab tiaj tus, kuaj ultrasonic ntawm phaj qhov xav tau, thiab kev kuaj xyuas qhov kev lees paub corrosion rau 5083 hauv H116 lossis H321. Kev ywj pheej saum npoo av los ntawm kev sib kis ntawm hlau raug tshuaj xyuas ib yam nkaus, vim tias cov khoom siv hlau embedded los ntawm cov cuab yeej siv yog feem ntau ua rau xeb cov cim ntawm lwm yam corrosion-cov phaj resistant.
Cov lus nug nquag
Q: Dab tsi alloy yuav tsum tau teev tseg rau lub nkoj hull?
A: Hull plating thiab lub zog lawj cov qauv feem ntau tau teev tseg hauv 5083 rau nws cov txiaj ntsig siab dua thiab kev ua haujlwm corrosion . 5052 yog siv rau kev tsim kho thiab sab hauv tsis yog - cov khoom siv.
Q: LR lossis RINA ntawv pov thawj ntxiv dab tsi?
A: Kev pom zoo txhais tau hais tias cov khoom tau raug tsim thiab sim tawm tsam cov kev faib tawm hauv zej zog cov cai thiab nqa daim ntawv pov thawj tshuaj xyuas nrog cov khoom siv hluav taws xob, uas ib txwm xav tau rau cov khoom lag luam pov hwm.
Q: Puas yog ob qho tib si alloys weldable?
A: Yog. Ob leeg yog welded nrog haum 5xxx muab tub lim hlau, thiab ob leeg tsis yog cua sov- kho, yog li cov welded sib koom ua ke khaws ib feem zoo ntawm niam txiv lub zog hlau.
Q: 5083 puas tuaj yeem muab rau hauv phaj tuab dua 40 hli?
A: Cov seem hnyav yog muaj nyob rau hauv kev thov, tab sis cov marine ntau yam yog 3-40 mm, nrog dav txwv nyob ib ncig ntawm 2200 mm rau txias-rolled thiab 2500 mm rau kub dov phaj.
Q: Yuav ua li cas yog 5083 corrosion kuj txheeb xyuas?
A: Los ntawm exfoliation thiab intergranular corrosion xeem yuav tsum tau rau lub H116 thiab H321 tempers, nrog rau cov muaj pes tsawg leeg thiab mechanical xeem ntawm ASTM B928.
Q: Puas yog 5052 xav tau txheej tiv thaiv ntawm lub nkoj?
A: Nws ua tau zoo liab qab nyob rau hauv ntau qhov chaw, tab sis txheej yog ib txwm rau immersed nto, txaws zones thiab qhov twg lub phaj sib cuag cov hlau sib txawv.
