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The AA3003 aluminum-alloy melt was treated with different types of melt treatment, and the effect of the melt treatment on the microstructure and mechanical properties of the alloy was investigated. The results show that the impurity content of the untreated (UT) AA3003 aluminum alloy reached 0.6801 %. Its structure contains two kinds of particles, β-Al (FeMn) and α -Al (MnFeSi), whose distributions look like long strips, massive and skeletal forms, reducing the strength and plastic toughness of the material. After the efficient integrated treatment (EIT), the impurity content of the alloy decreased significantly, and the fluidity of the aluminum melt was improved, which is conducive to the role of a refiner, refining the cast grain size. An addition of La and Ce during the EIT eliminates the presence of the harmful second-phase Mn (MnFe) Si and Al (FeMn) distributed at the grain boundaries. The grain boundaries become stable, and the heat resistance and high-temperature performance of the alloy are improved, which is advantageous for the hot-deformation processing. The purity of the AA3003 aluminum alloy is significantly improved with the EIT, which is conducive to the subsequent grain refinement and modification so that the metallurgical quality of the alloy is significantly improved. Its mechanical properties at room temperature and after a thermal deformation are superior to those of the AA3003 aluminum alloy processed with the conventional integrated treatment (CIT). © Institute of Metals and Technology, Ljubljana, Slovenia.Avtorji prispevka so talino Al zlitine AA3003 obdelovali na različne načine in raziskovali njihov vpliv na mikrostrukturo in mehanske lastnosti te zlitine. Rezultati raziskave so pokazali, da je bila vsebnost nečistoč v neobdelani (UT; angl.: untreated) AA3003 zlitini 0,6801 %. V strukturi zlitine sta se nahajali dve vrsti delcev, β-Al (FeMn) inα-Al (MnFeSi), ki so bili po zlitini porazdeljeni v obliki dolgih trakov. Te masivne skeletne oblike delcev zmanjšujejo trdnost in žilavost materiala. Po učinkoviti integrirani obdelavi taline (EIT; angl.: efficient integrated treatment) se je vsebnost nečistoč občutno zmanjšala, izboljšala se je tekočnost taline in posledično je prišlo do udrobljenja zlitine (zmanjšanja velikosti zrn). Dodatek La in Ce med EIT je odstranil škodljivo Mn fazo (MnFe), tako da sta se Si in Al (FeMn) porazdelila po kristalnih mejah. Kristalne meje tako postanejo stabilne in izboljšajo se mehanske lastnosti zlitine pri povišanih temperaturah, kar je prednost pri nadaljnjih postopkih vroče deformacije. Čistost Al zlitine AA3003 se je močno povečala z EIT, kar je vodilo do učinkovitega zmanjšanja velikosti kristalnih zrn in občutnega izboljšanja metalurške kvalitete zlitine. Njene mehanske lastnosti so bile pri sobni temperaturi po termični deformaciji precej boljše, kot jih dosežemo pri Al zlitini AA3003 s konvencionalno integrirano toplotno obdelavo (CIT, angl.: conventional integrated treatment). © Institute of Metals and Technology, Ljubljana, Slovenia.
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Materiali in Tehnologije
ISSN: 1580-2949
Year: 2018
Issue: 5
Volume: 52
Page: 583-589
0 . 7 1 4
JCR@2018
0 . 6 0 0
JCR@2023
ESI HC Threshold:284
JCR Journal Grade:4
CAS Journal Grade:4
Cited Count:
SCOPUS Cited Count: 8
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 2
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