304 bakin karfe abu ne na gama gari tsakanin bakin karfe, tare da yawan 7.93 g/cm³; Ana kuma kiransa 18/8 bakin karfe a cikin masana'antar, wanda ke nufin ya ƙunshi fiye da 18% chromium da fiye da 8% nickel; shi ne resistant zuwa high yanayin zafi na 800 ℃, yana da kyau aiki yi da kuma high tauri, da aka yadu amfani a cikin masana'antu da furniture ado masana'antu da abinci da kuma likita masana'antu. Duk da haka, ya kamata a lura cewa index abun ciki na abinci-sa 304 bakin karfe ne mafi stringent fiye da na talakawa 304 bakin karfe. Misali: ma'anar kasa da kasa na bakin karfe 304 shine cewa yana dauke da 18% -20% chromium da 8% -10% nickel, amma abinci mai daraja 304 bakin karfe ya ƙunshi 18% chromium da 8% nickel, yana ba da damar haɓakawa cikin wani takamaiman. kewayon da iyakance abun ciki na nau'ikan ƙarfe masu nauyi daban-daban. A takaice dai, bakin karfe 304 ba dole ba ne kayan abinci 304 bakin karfe.
Hanyoyin yin alama gama gari a kasuwa sun haɗa da 06Cr19Ni10 da SUS304, waɗanda 06Cr19Ni10 gabaɗaya ke nuna daidaitattun samarwa na ƙasa, 304 gabaɗaya yana nuna daidaitattun daidaiton ASTM, kuma SUS304 yana nuna daidaitattun samar da Jafananci.
304 shine babban maƙasudin bakin karfe, wanda aka yi amfani da shi sosai a cikin kera kayan aiki da sassan da ke buƙatar ingantaccen aiki mai kyau (juriya na lalata da tsari). Domin kiyaye juriyar lalata bakin karfe, dole ne karfe ya ƙunshi fiye da 18% chromium da fiye da 8% nickel. 304 bakin karfe daraja ne na bakin karfe da aka samar daidai da ma'aunin ASTM na Amurka.
Kaddarorin jiki:
Ƙarfin ƙwanƙwasa σb (MPa) ≥ 515-1035
Ƙarfin yawan amfanin ƙasa σ0.2 (MPa) ≥ 205
Tsawaita δ5 (%) ≥ 40
Rushewar sashe ψ (%)≥?
Taurin: ≤201HBW; ≤92HRB; Saukewa: 210HV
Yawan yawa (20 ℃, g/cm³): 7.93
Matsayin narkewa (℃): 1398 ~ 1454
Ƙimar zafi ta musamman (0 ~ 100 ℃, KJ · kg-1K-1): 0.50
Ƙarfin zafin jiki (W·m-1·K-1): (100 ℃) 16.3, (500℃) 21.5
Ƙididdigar faɗaɗa madaidaici (10-6·K-1): (0~100℃) 17.2, (0~500℃) 18.4
Juriya (20 ℃, 10-6Ω·m2/m): 0.73
Module na roba mai tsayi (20 ℃, KN/mm2): 193
Abun da ke ciki
Rahoton
Edita
Don 304 bakin karfe, nau'in Ni a cikin abun da ke ciki yana da mahimmanci, wanda kai tsaye ke ƙayyade juriya da ƙimar 304 bakin karfe.
Abubuwan da suka fi muhimmanci a cikin 304 sune Ni da Cr, amma ba su iyakance ga waɗannan abubuwa biyu ba. An ƙayyade takamaiman buƙatun ta ma'aunin samfur. Hukuncin gama gari a cikin masana'antar shine muddin abun ciki na Ni ya fi 8% kuma abun cikin Cr ya fi 18%, ana iya ɗaukarsa azaman 304 bakin karfe. Wannan shine dalilin da ya sa masana'antar ke kiran irin wannan nau'in bakin karfe 18/8 bakin karfe. A gaskiya ma, ƙa'idodin samfurin da suka dace suna da ƙayyadaddun ƙa'idodi don 304, kuma waɗannan ka'idodin samfurin suna da wasu bambance-bambance don bakin karfe na siffofi daban-daban. Masu zuwa wasu ƙa'idodin samfur na gama gari da gwaje-gwaje.
Don ƙayyade ko abu shine bakin karfe 304, dole ne ya cika buƙatun kowane kashi a cikin daidaitaccen samfur. Muddin mutum bai cika buƙatun ba, ba za a iya kiransa 304 bakin karfe ba.
1.ASTM A276
304
C
Mn
P
S
Si
Cr
Ni
Bukatu, %
≤0.08
≤2.00
≤0.045
≤0.030
≤1.00
18.0-20.0
8.0-11.0
2. ASTM A240 (Chromium da Chromium-Nickel Bakin Karfe Plate, Sheet, and Strip for Pressure essels and for General Applications)
304
C
Mn
P
S
Si
Cr
Ni
N
Bukatu, %
≤0.07
≤2.00
≤0.045
≤0.030
≤0.75
17.5-19.5
8.0-10.5
≤0.10
3. JIS G4305 (sanyi-birgima bakin karfe farantin, takardar da tsiri)
Farashin 304
C
Mn
P
S
Si
Cr
Ni
Bukatu, %
≤0.08
≤2.00
≤0.045
≤0.030
≤1.00
18.0-20.0
8.0-10.5
4. JIS G4303 (Bakin Karfe sanduna)
Farashin 304
C
Mn
P
S
Si
Cr
Ni
Bukatu, %
≤0.08
≤2.00
≤0.045
≤0.030
≤1.00
18.0-20.0
8.0-10.5
Ma'auni huɗun da ke sama wasu ne kawai daga cikin na kowa. A zahiri, akwai fiye da waɗannan ƙa'idodi waɗanda suka ambaci 304 a cikin ASTM da JIS. A zahiri, kowane ma'auni yana da buƙatu daban-daban don 304, don haka idan kuna son sanin ko kayan yana da 304, ingantacciyar hanyar bayyana shi yakamata ta kasance ko ta dace da buƙatun 304 a cikin takamaiman samfurin.
Matsayin samfur:
1. Hanyar yin lakabi
Cibiyar Iron da Karfe ta Amurka tana amfani da lambobi uku don yiwa lakabin ma'auni daban-daban na bakin karfe na jabu. Tsakanin su:
① Austenitic bakin karfe da aka lakafta tare da 200 da 300 jerin lambobi. Misali, wasu bakin karfe na austenitic na yau da kullun ana yiwa lakabi da 201, 304, 316 da 310.
② Bakin Karfe na Ferritic da Martensitic ana wakilta su da jerin lambobi 400.
③ Ferritic bakin karfe ana yiwa lakabi da 430 da 446, kuma bakin karfe na martensitic ana yiwa lakabi da 410, 420 da 440C.
④ Duplex (austenitic-ferrite), bakin karfe, hazo hardening bakin karfe da high gami da baƙin ƙarfe abun ciki na kasa da 50% yawanci ana kiran su da lamban kira sunayen ko alamun kasuwanci.
2. Rarrabewa da daraja
1. Grading da rarrabuwa: ① National Standard GB ② Ma'aunin Masana'antu YB ③ Ma'aunin Gida ④ Ma'aunin Kasuwancin Q/CB
2. Rarraba: ① Ma'auni na samfur ② Daidaitaccen marufi ③ Daidaitaccen tsari
3. Madaidaicin matakin (kasu kashi uku): matakin Y: Matsayin ci gaba na kasa da kasa: matakin gaba daya na duniya matakin H: matakin ci gaba na cikin gida
4. Matsayin kasa
GB1220-2007 Bakin karfe sanduna (I matakin) GB4241-84 Bakin karfe walda nada (H matakin)
GB4356-2002 Bakin karfe walda nada (I matakin) GB1270-80 Bakin karfe bututu (I matakin)
GB12771-2000 Bakin karfe welded bututu (Y matakin) GB3280-2007 Bakin karfe sanyi farantin (I matakin)
GB4237-2007 Bakin karfe zafi farantin (I matakin) GB4239-91 Bakin karfe sanyi bel (I matakin)
Lokacin aikawa: Satumba-11-2024