Dab tsi yog tus qauv specification thiab thawj alloy muaj pes tsawg leeg ntawm 5M52 Aluminium Phaj?
5M52 yog ib qho () txhuas-magnesium alloy feem ntau siv hauv kev siv dej hiav txwv. Nws cov tshuaj muaj pes tsawg leeg suav nrog 4.0-4.9% magnesium thiab 0.4-0.8% manganese ua cov ntsiab lus tseem ceeb alloying. Lub alloy muaj cov hlau tswj (<0.4%) and silicon (<0.3%) to enhance corrosion resistance. It corresponds roughly to international 5056A alloy but with modified manganese content. The4784-97 standard specifies its production and testing requirements.
Lub zog txhua yam ntawm 5M52 piv rau 5083 alloy li cas?
Hauv H321 temper, 5M52 ua tiav lub zog tensile ntawm 270-310 MPa, me ntsis qis dua 5083's 290-340 MPa. Nws lub zog tawm los ntawm 150-200 MPa piv rau 5083's 200-250 MPa. Tus elongation tus nqi (12-18%) yog superior rau 5083 (10-14%) vim optimized ua hauj lwm hardening. Ob lub alloys tuav zoo heev toughness ntawm subzero kub. 5M52 qhov sib npaug ntawm lub zog-ductility ua rau nws zoo dua rau cov khoom siv marine dynamic.
Dab tsi ua rau 5M52 tshwj xeeb rau Arctic marine daim ntawv thov?
5M52 qhia tshwj xeeb kev ua haujlwm ntawm qhov kub thiab txias li -60℃yam tsis muaj embrittlement. Nws cov ntsiab lus magnesium siab muab kev tiv thaiv cathodic tiv thaiv dej khov abrasion corrosion. Cov alloy qhia tau hais tias 30% siab dua qhov hnyav dua 5052 ntawm -40 degree. icebreaker cov hlab ntsha feem ntau siv 5M52 rau hull plating hauv qab dej. Tsis ntev los no Arctic offshore platforms kuj tau txais nws rau txaws cheeb tsam cov qauv.
Dab tsi yog cov txheej txheem vuam pom zoo rau 5M52 daim hlau tshaj 10mm thickness?
Rau tuab 5M52 daim hlau, ntau- dhau MIG vuam nrog ER5183 muab tub lim yog yuav tsum tau. Preheating rau 80-120℃tiv thaiv kev sib tsoo txias hauv subzero ib puag ncig. Kev sib koom ua ke yuav tsum muaj 60℃V-grooves nrog 2 hli hauv paus ntsej muag kom nkag mus rau tag nrho. Interpass kub yuav tsum tau khaws cia hauv qab 150℃kom tsis txhob HAZ softening. Tom qab-weld kev ntxhov siab nyem ntawm 250℃rau 2 teev yog pom zoo rau qhov tseem ceeb ntawm cov kabmob welds.
Yuav ua li cas corrosion kuj ntawm 5M52 ua nyob rau hauv tshuaj ua ib puag ncig?
5M52 qhia tau zoo heev tsis kam mus rau concentrated nitric acid (txog 50% concentration ntawm 20 degree). Nws cov pitting kuj sib npaug tus naj npawb (PREN) tshaj 28, superior rau 5052's 22. Cov alloy ua cov ntaub ntawv ruaj khov passive zaj duab xis hauv alkaline daws (pH 9-12). Txawm li cas los xij, nws tsis pom zoo rau kev pabcuam hydrochloric acid vim magnesium reactivity. Cov ntawv thov tsis ntev los no suav nrog phosphoric acid cia tanks thiab desalination cog cov khoom.
