A novel 2-D mathematical modeling to determine LHP to protect the industrial transient heat treatment quenched low carbon steels bar

Abdlmanam S.A. Elmaryami; Amal A.E. Mohamed

doi:10.5937/zasmat2303327E

Autori

Abdlmanam S.A. Elmaryami The Bright Star University [BSU], El-Brega, Libya Autor
Amal A.E. Mohamed University of Tobruk,Tobruk, Libya Autor

DOI:

https://doi.org/10.5937/zasmat2303327E

Apstrakt

2-dimenzionalni matematički model osovine simetrične tranzijentne industrijske šipke od niskougljeničnog čelika, da bi se ispitao uticaj istorije procesa na metalurške i karakteristike materijala, usvojen je vodeno hlađeni model zasnovan na tehnici konačnih elemenata. Dvodimenzionalni osnosimetrični matematički model je korišćen za predviđanje istorije temperature i, kao rezultat, tvrdoće kaljene čelične šipke u bilo kom čvoru (tački).Ocenjuje se LHP (najniža tačka tvrdoće). U ovom radu, tvrdoća tačaka uzorka je procenjena transformacijom utvrđenog karakterističnog vremena hlađenja za faznu konverziju t8/5 u tvrdoću. Model se može koristiti kao smernica za dizajniranje pristupa hlađenju da bi se postigla željena mikrostruktura i mehanička svojstva, na primer, tvrdoća. Matematički model je verifikovan i validiran upoređivanjem njegovih rezultata tvrdoće sa rezultatima komercijalnog softvera konačnih elemenata. Poređenje pokazuje da je predloženi model pouzdan.

Ključne reči:

toplotna obrada, gašenje, ososimetrična čelična šipka, konačni elementi, 2-D matematičko modeliranje, prenos toplote u nestabilnom stanju

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