Ho ea ka boemo ba carbon content, carbon steel bakeng saho lahlaka kakaretso e arotsoe ka tšepe e tlase ea khabone, tšepe ea khabone e mahareng le tšepe e phahameng ea khabone. Litšepe tse entsoeng ka carbon tsa linaha tsohle tsa lefats'e ka kakaretso li aroloa ho ea ka matla a tsona, 'me limaraka tse tsamaellanang li etsoa.
Mabapi le metsoako ea lik'hemik'hale tsa carbon steel, ntle le phosphorus le sebabole, ha ho na lithibelo kapa meeli e ka holimo feela ea likarolo tse ling tsa lik'hemik'hale. Tlas'a motheo o ka holimo, metsoako ea lik'hemik'hale ea tšepe e entsoeng ka carbon e khethoa keqaloho latela thepa e hlokahalang ea mochini.
Mekhoa ea phekolo ea mocheso ea carbon steel castings hangata e annealing, normalizing kapa normalizing + tempering. Bakeng sa li-castings tse ling tse phahameng tsa tšepe, ho tima le ho futhumatsa ho ka boela ha sebelisoa, ke hore, ho tima + mocheso o phahameng oa mocheso, e le ho ntlafatsa thepa e feletseng ea mochine oa li-castings tsa carbon steel. Li-casting tse nyane tsa carbon steel li ka tingoa ka ho toba le ho halefa ho tloha sebakeng sa as-cast. Bakeng sa li-castings tsa tšepe tsa k'habone tse kholo kapa tse rarahaneng, ho loketse ho etsa phekolo ea quenching le ea tempering ka mor'a ho tloaeleha ho phekola.
Phello ea carbon ho microstructure le thepa ea carbon steel
1) Tšusumetso ea carbon holim'a sebopeho sa tšepe ea carbon
Carbon ke ntho e ka sehloohong e khethollang sebopeho sa metallographic le thepa ea tšepe. Mofuteng oa tšepe ea hypoeutectoid, ha carbon content e ntse e eketseha, palo e lekanyelitsoeng ea ferrite e fokotseha 'me palo e lekanyelitsoeng ea pearlite e eketseha. Ha u fihla sebopeho sa eutectoid, kaofela ke pearlite. Sebakeng sa hypereutectoid, ha carbon content e ntse e eketseha, palo e lekanyelitsoeng ea proeutectoid cementite e eketseha 'me palo e lekanyelitsoeng ea pearlite e fokotseha.
2) Phello ea carbon ho thepa ea mochine ea carbon steel
Carbon e ama thepa ea mochini ea tšepe ea khabone ka ho ama litekanyo tse lekanyelitsoeng le litšobotsi tsa kabo ea karolo e 'ngoe le e' ngoe ea sebopeho ho microstructure. Ka kakaretso, ha carbon content e ntse e eketseha, ho thatafala ha carbon steel ho tla eketseha, empa matla a eona a matla le ho lelefatsa ho tla fokotseha. Matla a tsitsitseng le matla a tlhahiso a tla qala ho eketseha ebe a fokotseha ha khabone e ka har'a tšepe e eketseha.
3) Phello ea khabone ts'ebetsong ea ho itšeha ea li-castings tsa carbon steel
Tšepe e nang le khabone e tlase e na le ferrite e ngata, boima bo tlase, polasetiki e ntle le ho khomarela habonolo, kahoo ts'ebetso ea eona ea ho itšeha e batla e fokola. Ho na le cementite e eketsehileng ka tšepe e phahameng ea carbon. Ha cementite e ajoa ka flake le marang-rang, sesebelisoa se bonolo ho apara, kahoo ts'ebetso ea eona ea ho itšeha e batla e futsanehile. Karo-karolelano ea ferrite le cementite ka tšepe e bohareng ea carbon e loketse, ho thatafala le polasetiki le tsona li lekane, 'me ts'ebetso ea ho itšeha e molemo. Ts'ebetso ea ho itšeha e ntle ka ho fetisisa ha mefuta e thata ea li-castings tsa tšepe e le 180-230 HBW.
4) Tšusumetso ea khabone ts'ebetsong ea ho lahla ea tšepe ea carbon
Ka mocheso o tšoanang, metsi a tšepe e qhibilihisitsoeng a nang le lik'habone tse fapaneng a fapane. Hobane litšepe tse nang le likarolo tse fapaneng tsa khabone li na le likhato tse fapaneng tsa nts'etsopele ho li-dendrites. Ha nako e telele ea mocheso oa sebaka sa crystallization (phapang ea mocheso pakeng tsa mohala oa liquidus le solidus line), likristale tsa dendritic tsa carbon steel li ntse li tsoela pele, ke hore, ho mpefala ha metsi a tšepe e qhibilihisitsoeng, e leng se etsang hore bokgoni ba tshepe e tshetsoeng ho tlatsa hlobo.
