1. Ki sa ki se 20# tiyo asye san pwoblèm?
20# tiyo asye san pwoblèm se te fè nan 20# asye, ki gen yon fòs yon ti kras pi wo pase 15# asye. Li se raman janm mouri ak pa gen okenn fragmanite tanperaman. Li gen gwo plastisit deformation frèt epi li se jeneralman itilize pou koube, woule, koube ak rakle. Li gen bon pèfòmans soude pou soude ak ak soude kontak. Li te gen yon ti epesè pandan soude gaz ak se tendans fant sou pati ak kondisyon aparans strik oswa fòm konplèks.
2. 20# Materyèl Creole
Materyèl la nan 20# tiyo asye san pwoblèm se: -wo kalite kabòn asye estriktirèl
Klas: 20#
Creole: GB 8162-2018, GB\/T 8163-2018, GB 3087-2008, GB 9948-2013, GB 5310-2017
3. Konpozisyon Chimik
Kabòn C: {{0}}. 17%~ 0.20%
Silisyòm si: {{0}}. 17%~ 0.37%
Manganese Mn: {{0}}. 35%~ 0.65%
Souf s: mwens pase oswa egal a 0. 035%
Fosfò P: mwens pase oswa egal a 0. 035%
CHROMIUM CR: Mwens pase oswa egal a 0. 25%
Nikèl Ni: mwens pase oswa egal a 0. 25%
Copper Cu: mwens pase oswa egal a 0. 25%
4. Entwodiksyon nan pwopriyete mekanik
Fòs rupture σB (MPa): pi gran pase oswa egal a 410 (42)
Sede fòs σs (MPa): pi gran pase oswa egal a 245 (25)
Elongasyon δ (%): pi gran pase oswa egal a 25
Seksyonèl kontraksyon ψ (%): pi gran pase oswa egal a 5,
5. Ki sa ki pwosesis la ap koule?
Hot rolling (extruded seamless steel pipe): round tube billet → heating → perforation → three-roller oblique rolling, continuous rolling or extrusion → tube removal → sizing (or reducing diameter) → cooling → billet tube → straightening → quality inspection of wall thickness → water pressure test (or flaw detection) → marking → storage.
Fwad trase (woule) tiyo asye san pwoblèm: wonn tib billet → chofaj → pèrforasyon → tit → rkwir → marinated → lwil oliv (kwiv plating) → milti-pase desen frèt (woule frèt) → billet tib → tretman chalè → redresman → bon jan kalite enspeksyon nan epesè miray → tès presyon dlo (Defi yo) → mak → mak → mak → mak → mak → mak → mak → mak → mak → mak yon.
