Indice del forum

Udu Biologia Lecce

Gli studenti di biologia di Lecce

PortalPortale  blogBlog  AlbumAlbum  Gruppi utentiGruppi utenti  Lista degli utentiLista degli utenti  GBGuestbook  Pannello UtentePannello Utente  RegistratiRegistrati 
 FlashChatFlashChat  FAQFAQ  CercaCerca  Messaggi PrivatiMessaggi Privati  StatisticheStatistiche  LinksLinks  LoginLogin 
 CalendarioCalendario  DownloadsDownloads  Commenti karmaCommenti karma  TopListTopList  Topics recentiTopics recenti  Vota ForumVota Forum

Low carbon steel properties
Utenti che stanno guardando questo topic:0 Registrati,0 Nascosti e 0 Ospiti
Utenti registrati: Nessuno


 
Nuovo Topic   Rispondi    Indice del forum -> Parole al Vento
PrecedenteInvia Email a un amico.Utenti che hanno visualizzato questo argomentoSalva questo topic come file txtVersione stampabileMessaggi PrivatiSuccessivo
Autore Messaggio
wangkiky








Registrato: 06/11/15 06:09
Messaggi: 1402
wangkiky is offline 

Localitą: shanghai,shanghai


Sito web: http://ecooutdoorfloor...

MessaggioInviato: Gio Ago 26, 2021 8:43 am    Oggetto:  Low carbon steel properties
Descrizione:
Rispondi citando

Mild steel is a carbon steel with carbon content less than 0.25%. It is also called mild steel because of its low strength and low hardness. It includes most ordinary carbon structural steels and some high-quality carbon structural steels. Most of them are used for engineering structural parts without heat treatment, and some are used for mechanical parts requiring wear resistance after carburizing and other heat treatment.
The annealed microstructure of low carbon steel is ferrite and a small amount of pearlite, which has low strength and hardness, good plasticity and toughness. Therefore, its cold formability is good, and cold forming can be carried out by crimping, bending, stamping and other methods. This steel also has good weldability. Low carbon steel generally refers to the steel with carbon content between 0.10 ~ 0.25%. This kind of steel has low hardness and good plasticity. It is easy to adopt cold plastic deformation forming process, welding and cutting. It is often used to manufacture chains, rivets, bolts, shafts, etc.[url=http://www.anticorrosionsteel.com/sheet-plate/539.html]precoated wall steel sheeting[/url]
The annealed microstructure of low carbon steel is ferrite and a small amount of pearlite, which has low strength and hardness, good plasticity and toughness. Therefore, it has good cold formability and can be cold formed by crimping, bending, stamping and other methods. This steel has good weldability. Low carbon steel with low carbon content has low hardness and poor machinability. Normalizing can improve its machinability.
[url=http://www.anticorrosionsteel.com/steel-supply/2243.html]430 stainless steel type 2b stainless steel sheet[/url]
Low carbon steel has great aging tendency, including quenching aging tendency and deformation aging tendency. When the steel cools rapidly from high temperature, the carbon and nitrogen in ferrite are supersaturated. It can also slowly form the carbon and nitrogen of iron at room temperature. Therefore, the strength and hardness of steel are improved, while the plasticity and toughness are reduced. This phenomenon is called quenching aging. Even if low carbon steel is not quenched but air cooled, aging will occur. The carbon and nitrogen atoms in ferrite interact elastically with the dislocations, and the carbon and nitrogen atoms gather around the dislocation line. This combination of carbon and nitrogen atoms and dislocation lines is called old Coriolis air mass (Coriolis air mass). It will increase the strength and hardness of steel and reduce the plasticity and toughness. This phenomenon is called deformation aging. Deformation aging is more harmful to the plasticity and toughness of low carbon steel than quenching aging. There are obvious upper and lower yield points on the tensile curve of low carbon steel. From the upper yield point to the end of yield extension, there is a surface wrinkle band formed due to uneven deformation on the sample surface, which is called ludes band. Many stamping parts are often scrapped. There are two ways to prevent it. It is a high pre deformation method. The pre deformed steel will also produce ludes belt during stamping after being placed for a period of time. Therefore, the pre deformed steel should not be placed for too long before stamping. The other is to add aluminum or titanium to the steel to form a stable compound with nitrogen to prevent deformation aging caused by the formation of Coriolis gas mass.[url=http://www.anticorrosionsteel.com/sheet-plate/1137.html]two layers of wire reinforced flexible[/url]
Torna in cima
Profilo Messaggio privato Invia email HomePage
Adv



MessaggioInviato: Gio Ago 26, 2021 8:43 am    Oggetto: Adv






Torna in cima
Mostra prima i messaggi di:   
Nuovo Topic   Rispondi    Indice del forum -> Parole al Vento Tutti i fusi orari sono GMT + 1 ore
Pagina 1 di 1

 
Vai a:  
Puoi inserire nuovi Topic in questo forum
Puoi rispondere ai Topic in questo forum
Non puoi modificare i tuoi messaggi in questo forum
Non puoi cancellare i tuoi messaggi in questo forum
Non puoi votare nei sondaggi in questo forum
Puoi allegare files in questo forum
Puoi scaricare files da questo forum





Udu Biologia Lecce topic RSS feed 
Powered by MasterTopForum.com with phpBB © 2003 - 2008