Bambanci Tsakanin Kayan SS304 da SS316

SS316 bakin ƙarfe galibi ana amfani dashi don layin dogo da aka girka kusa da tabkuna ko tekuna. SS304 sune kayan yau da kullun na cikin gida ko na waje.
 
Kamar matsayin AISI na Amurka na asali, bambancin aiki tsakanin 304 ko 316 da 304L ko 316L shine abun cikin carbon.
Jerin keɓaɓɓun carbon sune 0.08% mafi girma don 304 da 316 da 0.030% mafi girma don nau'ikan 304L da 316L.
Duk sauran nau'ikan jigilar abubuwa daidai suke (jeren nickel na 304 shine 8.00-10.50% kuma na 304L 8.00-12.00%).
Akwai karafa biyu na Turai na nau'in '304L', 1.4306 da 1.4307. 1.4307 shine bambancin da akafi bayarwa, a wajen Jamus. 1.4301 (304) da 1.4307 (304L) suna da zangon carbon na 0.07% mafi girma da kuma 0.030% mafi girma, bi da bi. Jigogin chromium da na nickel suna kama da juna, nickel ga duka maki masu ciwon 8% mafi ƙaranci. 1.4306 shine ainihin darajar Jamusanci kuma yana da ƙaramar Ni 10%. Wannan yana rage ƙarancin ƙarfe na ƙarfe kuma ya sami larura don wasu matakan sunadarai.
Matsayi na Turai don nau'ikan 316 da 316L, 1.4401 da 1.4404, sun yi daidai a kan dukkan abubuwa tare da jigon carbon na 0.07% mafi girma don 1.4401 da 0.030% mafi girma na 1.4404. Hakanan akwai manyan nau'ikan Mo (2.5% mafi ƙarancin Ni) na 316 da 316L a cikin tsarin EN, 1.4436 da 1.4432 bi da bi. Don ci gaba da rikitar da al'amura, akwai kuma maki 1.4435 wanda ya haɗu da Mo (2.5% mafi ƙaranci) da Ni (mafi ƙarancin 12.5%).
 
Tasirin carbon akan juriya lalata
 
Carbonananan ƙananan 'bambance-bambancen' (316L) an kafa su azaman madadin na 'matsayin' (316) ƙirar keɓaɓɓiyar carbon don shawo kan haɗarin lalatawar rikice-rikice (lalata lalata), wanda aka gano a matsayin matsala a farkon kwanakin aiwatar da wadannan karfe. Wannan na iya haifarwa idan aka riƙe karfe a cikin yanayin zafin jiki na 450 zuwa 850 ° C na tsawon mintoci da yawa, gwargwadon yanayin zafi kuma daga baya a fallasa shi zuwa mawuyacin yanayin lalata. Lalata sannan yana faruwa kusa da iyakokin hatsi.
 
Idan matakin carbon yana ƙasa da 0.030% to wannan lalatacciyar ƙazantarwar ba za ta faru ba bayan bayyanar da waɗannan yanayin yanayin, musamman don irin lokutan da aka saba samu a yankin da zafi ya shafa na welds a cikin 'kauri' sassan ƙarfe.
 
Tasirin matakin carbon akan waldawa
 
Akwai ra'ayi cewa ƙananan nau'in carbon suna da sauƙin walda fiye da daidaitattun nau'in carbon.
 
Da alama babu wata hujja bayyananniya game da wannan kuma ana iya haɗuwa da bambance-bambance tare da ƙananan ƙarfin ƙananan nau'in carbon. Typeananan nau'in carbon na iya zama da sauƙi a siffa da tsari, wanda hakan kuma zai iya shafar matakan danniyar saura da ya bar ƙarfe bayan an ƙirƙira shi kuma ya dace da walda. Wannan na iya haifar da 'daidaitattun' nau'ikan carbon da ke buƙatar ƙarin ƙarfi don riƙe su a matsayi sau ɗaya-an haɗa su don walda, tare da ƙarin halin saurin komawa baya idan ba a riƙe su da kyau ba.
 
Abubuwan walda na walda duka nau'ikan sun dogara ne akan ƙaramin ƙarancin carbon, don kauce wa haɗarin lalata lalataccen abu a cikin ƙwayar walda mai ƙarfi ko kuma daga yaɗuwar carbon cikin ƙarfe na mahaifa (kewaye).
 
Takaddun shaida biyu na ƙananan ƙarfe
 
Karafan da ake kerawa na kasuwanci, ta amfani da hanyoyin karafan karfe na yanzu, galibi ana samar da su azaman karamin carbon a matsayin abin aiki saboda ingantaccen sarrafawa a harkar karafan zamani. Sakamakon haka ana ba da samfuran ƙarfe da aka ƙaddara ga kasuwar 'ƙwararriyar takaddama' ta kasuwa ga duka zane-zane iri ɗaya kamar yadda za a iya amfani da su don ƙirƙirar ƙididdigar kowane ɗayan, a cikin takamaiman tsari.
 
Nau'in 304
 
BS EN 10088-2 1.4301 / 1.4307 zuwa mizanin Turai.
ASTM A240 304 / 304L KO ASTM A240 / ASME SA240 304 / 304L ga ƙa'idodin jirgin ruwan matsin lamba na Amurka.
Nau'in 316
 
BS EN 10088-2 1.4401 / 1.4404 zuwa mizanin Turai.
ASTM A240 316 / 316L KO ASTM A240 / ASME SA240 316 / 316L, ga ƙa'idodin jirgin ruwan matsin lamba na Amurka.

Post lokaci: Aug-19-2020