Dab tsi yog cov khoom siv tseem ceeb ntawm Q235NH? -} kev paub

Cov tshuaj tiv thaiv tseem ceeb ntawm Q235Nh (qhov tsawg-} cov huab cua alloy allloyLub hauv paus ntsiab lusuas xyuas kom meej nws cov khoom siv yooj yim thiabAlloying Ntsiabuas txhim kho nws cov atmospheric corrosion tsis kam. Cov cheebtsam no yog nruj me ntsis tswj hwm los ntawm cov qauv (piv txwv li tus qauv Suav GB / T 4171, zoo ib yam li cov qauv hlau loj) kom sib npaug thiab cov txheej txheem. Hauv qab no yog cov ncauj lus kom ntxaws ntawm nws cov ntsiab lus siv tshuaj lom neeg, nrog rau lawv cov ntsiab lus zoo li thiab cov haujlwm tseem ceeb:

1. Lub hauv paus ntsiab (lav cov khoom siv steel)

Cov ntsiab lus no tau ua cov hlau ua haujlwm ntawm cov hlau thiab txiav txim siab nws lub zog yooj yim, ductility, thiab weldability.

Lub ntsiab	Yeeb Nkab Yeeb Yam	Cov ntsiab lus raug ntau (feem ntau feem,%)	Cov tseem ceeb ua haujlwm
Pa roj carbon	C	Tsawg dua los yog sib npaug rau 0.18	Txhim kho lub zog thiab tawv ntawm cov hlau; Txawm li cas los xij, ntau cov pa roj carbon txo weldability thiab tawv, yog li nws cov ntsiab lus yog txwv tsis pub tsawg.
Silicon	Si	0.15 – 0.35	Ua li deoxidizer thaum steelmaking stug stugmaking (tshem tawm cov pa oxygen ntau dhau los cuam tshuam); Tsis tas li me ntsis txhim kho lub zog yam tsis muaj kev cuam tshuam zoo heev.
Tus kws dai txiv manganese	Mn	0.30 – 1.40	Lub ntsiab tseem ceeb rau kev txhim kho lub zog thiab tawv; Pab kom ua kom ua kom cov hlau microstructure thiab txo cov brittleness los ntawm leej faj.
Phosphorus	P	Tsawg dua los yog sib npaug rau 0.035	Kev cuam tshuam implity nyob rau hauv feem ntau cov xim hlau (ua rau "txias brittleness," txo kev tawv me me ntawm tsawg kub); Nws cov ntsiab lus yog nruj me ntsis tswj kom muaj kev nyab xeeb.
Leej mos	S	Tsawg dua los yog sib npaug rau 0.035	Lwm qhov kev tsim txom impurity (ua rau "kub brittleness," ua rau tawg thaum siab - kub ua zoo li vuam lossis dov); nruj txwv tiv thaiv kev ua haujlwm tsis xws luag.

2. Alloying ntsiab (txhim kho corrosion tsis kam)

Qhov kev sib ntxiv ntawm cov ntsiab lus alloy yog qhov laj thawj tseem ceeb Q235NH muaj cov atcospheric zoo dua li cov roj carbon hlau (piv txwv li Q235). Cov ntsiab lus no txhawb kev tsim cov ntom ntom, adherentTiv thaiv cov xeb (patina)ntawm cov hlau nto.

Lub ntsiab	Yeeb Nkab Yeeb Yam	Cov ntsiab lus raug ntau (feem ntau feem,%)	Tub ntxhais muaj nuj nqi (corrosion tsis kam)
Tooj liab	CU	0.20 – 0.50	Qhov tseem ceeb tshaj plaws corrosion - tsis kam rau Q235NH. Nws ua rau cov txheej xeb, txhawb nqa kev tsim cov ruaj khov {3}
Yeebsab	Cr	0.30 – 1.20	Txhim kho qhov kev cog lus thiab kev ruaj khov ntawm cov xeb xeb. Nws reacyacts nrog oxygen los ua ib daim nyias nyias chromium oxide zaj duab xis, piv txwv li ntxiv cov kev nkag mus rau hauv cov xov xwm corrosive (piv txwv li, noo noo, cov kuab paug) thiab qeeb qeeb qeeb.
Tus menyuam yaus	Ni	Tsawg dua los yog sib npaug rau 0.65 (feem ntau 0.10 - 0.50 hauv kev xyaum)	Txhim kho cov tawv ntawm cov hlau thaum 协同 (synergistically) txhim kho corrosion tsis kam nrog CU thiab CR. Nws pab ruaj khov txoj kev tiv thaiv xeb, tshwj xeeb tshaj yog nyob rau hauv me ntsis noo noo lossis kuab paug hauv av ntas.
Tooj dawb	Al	Ntau dua los yog sib npaug rau 0.015 (lossis teev raws li deoxidizer)	Ua raws li lub dag zog muaj zog los ntxuav cov hlau; Kuj nyeem cov qauv sib dhos, txhim kho kev nruj. Muaj qee kis, nws pab tsim cov qauv sib zog ntau xeb txheej.

3. Nco ntsoov txog kev sib txawv

Cov ntsiab lus tseeb ntawm cov ntsiab lus yuav txawv me ntsis ntawm txawv steel mills lossis cov khoom lag luam muag khoom, tab sis lawv yuav tsum ua raws li cov qauv sab saud (piv txwv li GB / T 4171). Rau cov ntawv tseem ceeb, nws yog ib qho tsim nyog los xa mus rauMill xeem Daim Ntawv Pov Thawj (MTC)muab los ntawm cov chaw tsim khoom rau cov ntaub ntawv uas yog cov ntaub ntawv tiv thaiv.

Tsis zoo li siab - qib hluav taws kub (piv txwv li cov ntsiab lus tsis zoo thiab txwv tsis pub siv cov txiaj ntsig hnyav (piv txwv li

info-324-263 info-322-259