1. Dab tsi yog 20 # Seamless steel yeeb nkab?
20 # Seamless steel yeeb nkab yog ua los ntawm 20 # steel, uas muaj lub zog me dua li 15 # steel. Nws tsis tshua muaj quenched thiab tsis muaj kev npau taws brittleness. Nws muaj qhov siab txias tawg yooj yim thiab feem ntau siv rau dabtsi yog khoov, dov, khoov, khoov, khoov, khoov thiab rauj. Nws muaj kev ua haujlwm zoo vuam ua rau arc vuam thiab tiv toj vuam. Nws muaj cov tuab me me thaum lub roj vuam thiab muaj zog rau cov kab nrib pleb ntawm cov chaw nrog cov kab pom nruj lossis cov duab.
2. 20 # Cov Qauv Khoom Siv
Cov khoom ntawm 20 # seamless steel yeeb nkab yog: zoo carbon cov txheej txheem hlau
Qib: 20 #
Txheem: GB 8162-2018, GB \/ T} {1}}, gb}, gb {}}
3. Tshuaj lom neeg muaj pes tsawg leeg
Carbon c: {{{0}}}. 17% ~ 0.20%
Silicon Si: {{0}}}. 17% ~ 0.37%
Manganese MN: {{{0}}}. 35% ~ 0.65%
Sulphur S: Tsawg dua los yog sib npaug rau 0. 035%
Phosphorus P: Tsawg dua lossis sib npaug rau 0. 035%
Chromium cr: tsawg dua los yog sib npaug rau 0. 25%
Nickel Ni: tsawg dua los yog sib npaug rau 0. 25%
Tooj liab CU: tsawg dua los yog sib npaug rau 0. 25%
4. Taw qhia rau cov khoom siv me tshuab
Lub zog tensile σB (MPA): ntau dua lossis sib npaug rau 410 (42)
Tos Lub Zog σS (MPA): Ntau dua lossis sib npaug rau 245 (25)
Elongation δ (%): Ntau dua los yog sib npaug rau 25
Ntu shrinkage ψ (%): ntau dua lossis sib npaug rau 5,
5. Cov txheej txheem ntws li cas?
Kub Rolling (Extruded Seamless Steel Yeeb Nkab): Hloov Rauv Thiaj Thoj
Txias txav (dov) seamless steel yeeb nkab: cleating raj dej → Kev Kho Mob Cua Sov) → Kev Kho Mob Cua Sov
