En 10028-5 p420m rau lub siab ntsha siab lub phaj

Nrog tsawg kawg 420 mpa yield zog, siab rau cov khoom siv steel p420m, p yog nyob rau hauv cov khoom siv kub yam tsawg kawg ntawm cov cua sov ntawm cov cua sov ntawm cov cua sov ntawm kev ntsuas kub ntawm rho tawm 20 CENTI DEGREE .

Hauj lwm lawm

Kev tsis

Tshuaj lom neeg muaj pes tsawg leeg tshuaj thiab cov neeg kho tshuab:

En 10028-5 p420m tshuaj lom neeg siv tshuaj
Teem nqi	Lub caij max (%)
Teem nqi	C	Si	Mn	P	S	Al	N
P420M	0,16	0,50	1,70	0,025	0,020	0,020	0,020
	Nb	V	Ti	Ni	Mo
	0,05	0,10	0,05	0,50	0,20

Teem nqi	P420M Cov Khoom Siv Hauv Pa
Teem nqi	Qhov tuab	Pub	Lub tensile	Elongation
P420M	lub hli	Min MPa	MPa	Min%
	6-16	420	500-660	19%
	16-40	400	500-660	19%
	40-63	390	500-660	19%

1. Dab tsi ua rau p420m tshwj xeeb ntawm Thermomecharanically dov daim hlau?

Teb:
P420m muabQhov muaj zog zoo-kev sib npaugLos:

420 MPA yam tsawg kawg zog zog zog(siab dua p355 qib)

Tswj -20}℃cuam tshuam kev nyuaj(40J Charpy V-NotC)

Qis dua cov pa hluav taws(CEV tsawg dua los yog sib npaug rau 0.42) dua li quenched-temped sib npaug

Raws li-dovyuav tsum tsis muaj kev kho cua sov ntxiv

2. Txoj kev TMCP ua tiav cov txheej txheem no li cas?

Teb:
Cov thermomechanical tswj kev ua koom nrog:

Kev tswj cov reging rollingsaum toj 1000 degree

Tiav Diav Dausntawm 750-850℃(hauv qab recrystallization)

Nrhov cua txiasntawm 10-25℃/ s

MicroalloyingNrog NB ({0.02-0.05%) thiab v (0.03-0.08%)
Ua rau nyob rau hauvNplua me-bainitic microstructure

3. Dab tsi yog vuam ceev ceev yog qhov tseem ceeb?

Teb:
Tseem ceeb vuam raws tu qauv:

Preheat: 125-175°C (for t>20mm)

Cov neeg tau txais kev: En iso {16834- 49 4 m 21 3 ni ni

Cov tswv yim tshav kub: {1.5-2.8 kj / hli

Piv txwv: Tsawg dua los yog sib npaug nrog 250 degree

Thoob: Only required for t>50 hli ({580-620℃× 1h)

Cov kev txiav txim siab tshwj xeeb:
• Hauv paus Pass tswjTxhawm rau tiv thaiv kom tsis txhob tawg
• Cov ntawv tshawb fawb tawv required for thickness >30mm
• Tsis txhob submerged arc vuamrau cov pob qij txha tseem ceeb

4.} Qhov twg yog P420M nyiam tshaj quenched-tempes?

Teb:
Xaiv P420m thaum:
✔ Fabrication Ceevyog qhov tseem ceeb (tsis muaj Q & T yuav tsum tau)
✔ Moderate corrosion tsis kamtus npluas
✔ {{0 {}}℃rau 400 degreeKev Pab Cuam Tshuam
✔ Nqi txontawm 15-20% vs Q & T cov qib xav tau

Cov Kev Siv Raug Raug:

Nruab Nrab-Siab Cia Tso Tsheb Hlau

Ua kom sov pob cua sov

Lub hwj huam cog cov nkoj

Cov txheej txheem Offshore

Cim npe nrov: en 10028-5 P420m rau siab lub nkoj phaj, Tuam Tshoj en10028-5 p420m rau siab hlab ntsha phaj, cov chaw muag khoom, Hoobkas