① Cov tshuaj muaj pes tsawg leeg ntawm cov hlau: Cov tshuaj muaj pes tsawg leeg ntawm cov hlau yog ib qho tseem ceeb tshaj plaws uas cuam tshuam rau kev ua haujlwm ntawm seamless steel kav, thiab nws tseem yog lub hauv paus tseem ceeb rau kev tsim cov txheej txheem dov thiab steel yeeb nkab cov txheej txheem kev kho cua sov.
ib. Alloy ntsiab: txhob txwm ntxiv, nyob ntawm seb lub hom phiaj
b. Cov khoom seem: coj los rau hauv lub sijhawm steelmaking, tswj kom tsim nyog
c. Cov khoom tsis zoo: Kev tswj nruj nruj (As, Sn, Sb, Bi, Pb), gases (N, H, O)
Tawm ntawm lub cub tawg refining los yog electroslag remelting: txhim kho cov uniformity ntawm cov tshuaj muaj pes tsawg leeg thiab purity ntawm hlau, txo cov non-metallic inclusions nyob rau hauv cov yeeb nkab billets, thiab txhim kho lawv morphology faib.
② Geometric dimensional raug thiab cov duab ntawm cov kav hlau
ib. Qhov tseeb ntawm sab nraud ntawm cov yeeb nkab steel nyob ntawm txoj kev sizing, khoom siv, txheej txheem txheej txheem, thiab lwm yam.
Tso cai sib txawv ntawm sab nraud txoj kab uas hla δ= (D-Di) / Di × 100% D: Qhov siab tshaj plaws los yog qhov tsawg kawg nkaus sab nraud mm
Di: nominal sab nraud txoj kab uas hla mm
b. Qhov tseeb ntawm steel yeeb nkab phab ntsa thickness yog muaj feem xyuam rau cov cua kub zoo ntawm cov yeeb nkab dawb paug, cov txheej txheem tsim thiab hloov tsis tau ntawm txhua tus txheej txheem deformation, cov cuab yeej zoo thiab lawv cov lubrication zoo, thiab lwm yam.
Phab ntsa thickness tso cai sib txawv: ρ= (S-Si) / Si × 100% S: Qhov siab tshaj plaws los yog tsawg kawg nkaus phab ntsa thickness ntawm tus ntoo khaub lig-section
Si: nominal phab ntsa thickness mm
C. Ovality ntawm cov yeeb nkab steel: sawv cev rau qib ntawm qhov tsis sib xws ntawm cov yeeb nkab steel.
d. Steel yeeb nkab ntev: ib txwm ntev, ruaj (ntau) ntev, tso cai ntev sib txawv
e. dabtsi yog khoov degree ntawm steel yeeb nkab: sawv cev rau qhov khoov degree ntawm steel yeeb nkab: khoov degree ib meter ntawm steel yeeb nkab ntev, qhov khoov degree ntawm tag nrho ntev ntawm steel yeeb nkab
f. Txiav txoj kab nqes ntawm steel yeeb nkab kawg lub ntsej muag: sawv cev rau qib ntawm inclination ntawm steel yeeb nkab kawg lub ntsej muag thiab tus ntoo khaub lig-section ntawm cov yeeb nkab steel
g. Steel yeeb nkab kawg lub ntsej muag zawj lub kaum sab xis thiab blunt ntug
5. Nto zoo ntawm cov kav hlau: Qhov yuav tsum tau ua kom smoothness
ib. Kev phom sij txaus ntshai: tawg, sab hauv quav, sab nraud quav, crushing, delamination, caws pliav, concavity, protrusions, thiab lwm yam.
b. Kev tsis xws luag: pitting, kab ntsuab, khawb, pob, me me sab hauv thiab sab nraud ncaj kab, cov cim rau cov menyuam, thiab lwm yam.
