Tsawg thiab nruab nrab siab boiler raj yog tsim los ntawm ingots los yog khoom billets uas yog perforated los ua ib tug burr raj, thiab ces kub dov, txias dov los yog txias dialed.Seamless steel yeeb nkab muaj txoj haujlwm tseem ceeb hauv Tuam Tshoj txoj kev lag luam steel yeeb nkab.Raws li kev txheeb cais tsis tiav, Tuam Tshoj cov khoom lag luam seamless yeeb nkab uas twb muaj lawm txog 240 ntau tshaj, seamless steel yeeb nkab chav tsev txog 250 teeb, txhua xyoo muaj peev xwm ntau dua 4.5 lab tons.Los ntawm caliber point of view, <φ76, accounting rau 35%, <φ159-650, accounting rau 25%.Nyob rau hauv cov nqe lus ntawm ntau yam, 1.9 lab tons ntawm lub hom phiaj dav dav, accounting rau 54%;760,000 tons ntawm cov roj av, suav txog 5.7%;150,000 tons ntawm hydraulic ncej, precision raj, accounting rau 4.3%;stainless hlau, bearing hlab, automotive hlab tag nrho ntawm 50,000 tons, accounting rau 1.4%.
Tsawg thiab nruab nrab siab boiler tube mechanical zog: tensile zog σb (MPa): ≥ 410 (42) yield zog σs (MPa): ≥ 245 (25) elongation δ5 (%): ≥ 25 seem shrinkage ψ (%): ≥ 5 , hardness: tsis kho cua sov, ≤ 156HB, qauv loj: qauv loj 25 hli kev kho cua sov specifications thiab metallographic koom haum: kub kho specifications: normalized, 910 ℃, cua txias.Lub koom haum metallographic: ferrite + pearlite.
Nruab nrab thiab tsis tshua muaj siab boiler raj ua tiav tus qauv: GB3087-1999 seamless steel raj rau qis thiab nruab nrab siab boiler.
Nruab nrab thiab tsis tshua muaj siab boiler raj yog kub dov thiab txias drawn (dov) seamless hlab ntawm high quality carbon structural steel siv los ua superheated chav tubes, dov dej raj thiab superheated chav tub raj rau locomotive boilers, cov pa luam yeeb loj, cov pa luam yeeb me me thiab arch. cib hlab rau ntau yam qauv ntawm qis thiab nruab nrab siab boilers.Feem ntau yog siv rau cov boilers muaj thiab nyob boilers thauj cov kav dej uas tsis tshua muaj siab thiab nruab nrab.Cov khoom sawv cev yog 10 thiab 20 gauge steel.