Kev qhia rau cov khoom siv mechanical thiab tshuaj lom neeg ntawm A516Gr70 steel phaj {{2} kev paub

Kev qhia txog cov khoom siv mechanical thiab tshuaj lom neeg ntawm A516Gr70 Hlau Phaj

1. Tshuaj lom neeg sib xyaw (ASTM A516 / A516M Txuj Ci)

1.1 Cov Qauv Yuav Tsum Tau

Lub ntsiab	Cov ntsiab lus (Max lossis Ntau Yam,%)	Lub luag haujlwm & Kev Cuam Tshuam
Carbon (c)	Tsawg dua los yog sib npaug rau 0.27	Nce lub zog tab sis txo weldability thiab tawv yog ntau dhau.
Manganese (mn)	0.85–1.20	Txhim kho lub zog, rov qab ua kom muaj zog, thiab txo cov kab mob kub kub kub.
Phosphorus (p)	Tsawg dua los yog sib npaug rau 0.025	Ua rau muaj kev phom sij; Ua rau mob khaub thuas brittleness (txo qis qis - kub ceev).
Sulphur (s)	Tsawg dua los yog sib npaug rau 0.025	Cov ntaub ntawv sulfide suav, txo qis dua thiab cuam tshuam kev cuam tshuam.
Silicon (si)	0.15–0.40	Ua yeeb yam li deoxidizer; Txhim kho lub zog tab sis yuav txo qis tawv yog tias muaj ntau dhau.

1.2 Xaiv Microalloy cov ntsiab

Niobium (nb), vanadium (v), titanium (ti):
Txhim kho lub zog thiab tsawg {- kub tawm ntawm cov khoom ua kom zoo (yeem).

Tooj liab (cu), npib tsib xee (ni):
Txhim khu kev txhim kho corrosion (piv txwv li, rau cov khoom siv acidic hauv petrochemical cov khoom siv).

1.3 Txawv tswj

Residual ntsiab: Chromium (CR) tsawg dua lossis sib npaug rau 0.25%, Molybdenum (mo) tsawg dua lossis sib npaug ntawm cov vuam / cov teeb meem kub).

2. Cov Khoom Siv Neeg Kho Tshuab

2.1 Cov Cuab Yeej Siv Khoom Siv (Chav Chav Dej)

Ntiag tug	Tus Qauv Txheem	Cov tswv yim tseem ceeb
Tensile lub zog (mpa)	485–620	Kuj mus rau pob txha lov; Cov txiaj ntsig siab dua yuav txo cov qauv siv zog.
Yield zog (mpa)	Ntau dua los yog sib npaug rau 260 (tuab tsawg dua lossis sib npaug nrog 50 hli)	Kev ntxhov siab tseem ceeb rau cov khoom tawg; cuam tshuam rau lub nkoj dav hlau tuab tsim.
Elongation (%)	Ntau dua los yog sib luag rau 17 (50 hli gauge ntev)	Kev ntsuas kev ntsuas; Cov nqi siab dua qhia tau zoo dua deformation muaj peev xwm.
Charpy V - tsis tshua muaj kev cuam tshuam	Ntau dua los yog sib npaug rau 20j @ -46 degree	Tsawg - kub ceev; Qhov tseem ceeb rau kev siv cryogenic.

2.2 tuab - Cov Khoom Nyob Ruaj

Yield zog txo qis nrog tuab:

Thickness tsawg dua los yog sib npaug rau 50mm: ntau dua lossis sib npaug nrog 260 MPa

50mm

100MM

Kev Cuam Tshuam Sim Kub: Tuaj yeem yog customized (piv txwv li, -29℃lossis-qib kawm ib daim ntawv cog lus).

2.3 high -} kub ua tau

Tsim Tsim Txias: 345℃(dhau qhov no, nkag / oxidation yuav tsum tau txiav txim siab).

Paib lub zog txo ntawm 300 degree: ~ 85% ntawm chav - kub tus nqi.

3. Kev sib raug zoo ntawm kev sib xyaw & cov yam ntxwv

Carbon sib npaug (CEQ):

Cov Qauv: * CeQ=C + MN / 6 +} ({} (ni + cu) / 15 *

Rau A516 Gr.70: Feem ntau tsawg dua lossis sib npaug rau 0.43 (zoo weldabilability nrog preheat).

Manganese - rau -} cov tshuaj piv txwv (mn / c):

Qhov zoo tagnrho li: 3-5 (zam banded microstructure lossis tsis muaj zog).

4. Kev ua & tswj kev ua tau zoo

4.1 VUAM

Preheating:

Thickness tsawg dua los yog sib npaug rau 25mm: yeem (xav tau yog tias qhov kub<5°C).

Thickness >25mm: 100-150 degree.

Post - Weld Kev Kho Tshav Kub (PWHT):
595-675℃(tuav lub sijhawm raws cov tuab) kom txo cov kev ntxhov siab uas muaj kev ntxhov siab.

4.2 Kev Sib Tw Kub

Kub Ua Haujlwm Kub: 870-900 Qib (zam qoob loo grainening).

Xaus Daus Kub: Ntau dua lossis sib npaug nrog 850℃(ua kom paub meej cov qauv qoob loo zoo).

5. Kev ua tau zoo txuam hauv cov ntawv thov

Cryogenic tso tsheb hlau luam (-46 degree): Yuav tsum muaj ntau dua lossis sib npaug zos rau 20j cuam tshuam lub zog @ -46℃thiab strensict p / s tswj.

High -} cov hlab ntsha: Kho mn lossis ntxiv cov microalloys kom muaj zog dua.

Corrosive ib puag ncig: Siv hic - istantarariants (piv txwv li, A516 Gr.70 HIC).

6. Kev sib piv nrog lwm cov hlau

Ntiag tug	A516 Gr.70	Q345r (GB 713)	P265G5GHISH (EN 10028-2)
Yield zog (mpa)	Ntau dua los yog sib npaug rau 260	Ntau dua los yog sib npaug rau 345	Ntau dua los yog sib npaug rau 265
Kev Cuam Tshuam Cuam Tshuam.	-46 degree	-20 degree	-50 degree
P / s tswj	0.025%	0.020%	0.025%

7.Yuxin Steel Company

Yuxin (Tianjin) Kev Lag Luam Thoob Ntiaj Teb Co., Ltd. yog tus neeg sawv cev steel. Lub lag luam tseem ceeb ntawm peb lub tuam txhab yog: Cov paib txheej me me, Wange cam khwb cia hlau, Langang, Shagang, Wangang, Wangang, cov nroj tsuag tawv, nrog rau ntau yam ntawm cov khoom lag luam steel. Yuxin steel tuaj yeem kho ntau yam kev qhia tshwj xeeb, cov ntaub ntawv ntawm cov paib thiab cov ntaub ntawv xa khoom rau lub sijhawm xa khoom sai, txhim khu cov nqi vaj tse. Lub tuam txhab muab ntau yam ntaub ntawv thiab cov ntaub ntawv tshwj xeeb ntawm cov hlau, cov paib siv hluav taws xob, cov thawv roj hmab siab, boiler nkoj, boiler lub nkoj, tsawg alloy nruab nrab Daim phiaj, cov carbon cov phiaj xwm nruab nrab, thiab lwm yam.

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