Tus qauv seamless yeeb nkab (GB / T8162-2008) yog ib hom seamless steel yeeb nkab siv rau cov qauv dav dav thiab cov qauv siv tshuab. Cov kua dej seamless steel yeeb nkab txheem siv rau seamless steel kav uas thauj cov kua.

Ntxiv rau cov ntsiab lus carbon (C) thiab qee qhov nyiaj ntawm silicon (Si) (feem ntau tsis tshaj 0.40%) thiab manganese (Mn) (feem ntau tsis tshaj 0.80%, siab dua mus txog 1.20%) alloy cov ntsiab lus rau deoxidation, qauv steel kav, tsis muaj lwm yam alloying ntsiab (tshwj tsis yog cov khoom seem).

Xws li cov qauv steel kav yuav tsum tau lees tias cov tshuaj muaj pes tsawg leeg thiab cov khoom siv kho tshuab. Cov ntsiab lus ntawm sulfur (S) thiab phosphorus (P) impurity ntsiab yog feem ntau tswj hauv qab 0.035%. Yog tias nws tswj tau qis dua 0.030%, nws yog hu ua qib high-zoo steel, thiab "A" yuav tsum tau ntxiv tom qab nws qib, xws li 20A; Yog tias P tswj tau qis dua 0.025% thiab S yog qis dua 0.020%, nws yog hu ua super high-zoo structural steel yeeb nkab, thiab nws qib yuav tsum tau ua raws li Add "E" kom paub qhov txawv. Rau lwm cov residual alloying ntsiab coj mus rau hauv cov qauv steel kav los ntawm raw cov ntaub ntawv, cov ntsiab lus ntawm chromium (Cr), npib tsib xee (Ni), tooj liab (Cu), thiab lwm yam. yog feem ntau tswj ntawm Cr≤0.25%, Ni≤0.30%, Cu≤ 0.25%. Qee qib ntawm manganese (Mn) cov ntsiab lus ncav cuag 1.40%, hu ua manganese steel.

Qhov txawv ntawm cov qauv seamless yeeb nkab thiab kua seamless yeeb nkab:

Lub ntsiab sib txawv ntawm nws thiab cov qauv seamless steel yeeb nkab yog cov kua seamless steel yeeb nkab yog raug rau hydraulic xeem ib los ntawm ib tug los yog ultrasonic, eddy tam sim no thiab sib nqus flux to soj ntsuam. Yog li ntawd, nyob rau hauv tus txheej txheem xaiv ntawm siab pipeline steel kav, kua seamless steel kav yuav tsum tsis txhob siv. Txoj kev sawv cev ntawm seamless steel yeeb nkab yog sab nraud txoj kab uas hla, phab ntsa thickness, thiab tuab-walled seamless steel yeeb nkab yog tsuas yog siv rau machining, thee mine, hydraulic steel, thiab lwm yam. Cov khoom ntawm tuab-walled seamless steel yeeb nkab yog muab faib ua 10 #, 20 #, 35 #, 45 #, 16Mn, 27SiMn, 12Cr1MoV, 10CrMo910, 15CrMo, 35CrMo thiab lwm yam.

Lub cev stainless hlau seamless yeeb nkab (GB / T14975-1994) yog kub dov (extruded, expansion) thiab txias drawn (dov) seamless steel kav.

Vim lawv cov txheej txheem tsim khoom sib txawv, seamless steel kav tau muab faib ua cov kav dej kub-kuav los tiag (extruded) seamless steel kav thiab txias-draw (dov) seamless steel kav. Cold drawn (dov) raj tau muab faib ua ob hom: cov raj puag ncig thiab cov raj tshwj xeeb.

Txheej txheem Flow Overview:
Kub dov (extruded seamless steel yeeb nkab): round tube billet → cua sov → perforation → peb-roller skew dov, nruam dov los yog extrusion → raj tshem tawm → sizing (los yog txoj kab uas hla txo) → txias → billet raj → straightening → dej siab Test (los yog kuaj pom qhov tsis haum) → cim → cia.

Cold drawn (dov) seamless steel yeeb nkab: round tube billet → cua sov → perforation → heading → annealing → pickling → oiling (tooj liab plating) → multi-pass txias drawing (txias dov) → billet → tshav kub kho → straightening → Hydraulic xeem (qhov tsis zoo nrhiav) → cim → warehousing.