1. Ntlha ea chai
Ha tšepe kapa sampuli e otlolloa, ha khatello ea kelello e feta moeli oa elastic, esita le haeba khatello ea kelello e sa eketsehe, tšepe kapa sampole e ntse e tsoela pele ho fetoha ka mokhoa o hlakileng oa polasetiki, o bitsoang ho tenyetseha, le boleng bo fokolang ba khatello ea kelello ha ketsahalo ea ho inehela e etsahala. ke bakeng sa ntlha ea tlhahiso.E-re Ps e be matla a ka ntle sebakeng sa tlhahiso s, 'me Fo e be sebaka sa sefapano sa sampuli, ebe ntlha ea lihlahisoa σs = Ps / Fo (MPa)..
2. Fana ka matla
Ntho ea tlhahiso ea lisebelisoa tse ling tsa tšepe ha e bonahale haholo ebile ho thata ho e lekanya.Ka hona, e le ho lekanya litšoaneleho tsa lihlahisoa tsa thepa, khatello ea kelello ha deformation ea polasetiki e sa feleng e lekana le boleng bo itseng (hangata 0,2% ea bolelele ba pele) bo hlalositsoe.ke matla a tlhahiso ea maemo kapa ho fana ka matla a σ0.2.
3. Matla a tsitsitseng
Boholo ba khatello ea maikutlo bo fihletsoeng ke thepa nakong ea ts'ebetso ea ho otlolla, ho tloha qalong ho ea ho fracture.E hlalosa bokhoni ba tšepe ea ho hanela ho robeha.Ho tsamaellana le matla a ho tsikitlanya, ho na le matla a hatellang, matla a feto-fetohang, joalo-joalo E re Pb e be matla a phahameng ka ho fetesisa a fihlelletsoeng pele thepa e ntšoa.
force, Fo ke sebaka se arohaneng sa sampole, ebe matla a tensile σb = Pb/Fo (MPa).
4. Elongation
Ka mor'a hore thepa e robehe, peresente ea bolelele ba eona ba polasetiki ho ea ho bolelele ba sampuli ea pele e bitsoa elongation kapa elongation.
5. Karolelano ea matla a lihlahisoa
Karo-karolelano ea ntlha ea lihlahisoa (matla a lihlahisoa) ea tšepe ho ea ho matla a ho tsitsa e bitsoa karolelano ea chai-matla.E kholoanyane karo-karolelano ea lihlahisoa, e phahamisa ho tšepahala ha likarolo tsa mohaho.Ka kakaretso, karo-karolelano ea lihlahisoa tsa carbon tšepe ke 06-0.65, le tlaase alloy sebopeho tšepe ke 065-0.75, 'me motsoako tšepe sebopeho ke 0.84-0.86.
6. Ho thatafala
Ho thatafala ho bontša bokhoni ba thepa ea ho hanyetsa ho hatella ntho e thata holim'a eona.Ke e 'ngoe ea lipontšo tsa bohlokoa tsa ts'ebetso ea lisebelisoa tsa tšepe.Ka kakaretso, ha boima bo phahame, ho molemo ho feta ho hanyetsa ho apara.Matšoao a tloaelehileng a ho thatafala ke Brinell hardness, Rockwell hardness le Vickers hardness.
Nako ea poso: Jul-20-2022