Mechanical Properties ntawm S420N 1.8902 Hlau Phaj
|
Nominal Thickness (hli) |
Yield zog ReH Min (MPa) |
Tensile zog Rm (MPa) |
Elongation A Min (%) |
Charpy KV Longitudinal Min (J) ntawm -20 degree |
Charpy KV Transverse Min (J) ntawm -20 degree |
|---|---|---|---|---|---|
|
Tsawg dua los yog sib npaug li 16 |
420 |
520–680 |
19 |
40 |
27 |
|
16 |
400 |
520–680 |
19 |
40 |
27 |
|
40 |
390 |
520–680 |
19 |
40 |
27 |
|
63 |
380 |
520–680 |
18 |
40 |
27 |
|
80 |
370 |
520–680 |
18 |
40 |
27 |
|
100 |
360 |
500–650 |
18 |
40 |
27 |
|
150 |
360 |
500–650 |
18 |
40 |
27 |
|
200 |
340 |
500–650 |
18 |
40 |
27 |
Kev kho cua sov qhia rau S420N 1.8902 Steel Phaj
S420N steel feem ntau yog muab nkag rau hauv qhov normalized (+N) lossis normalized dov mob raws li EN 10025-3, uas ua kom zoo dua cov qauv nplej kom txhim kho toughness thiab weldability.
Txheej txheem normalization
Kub kub: Austenitize ntawm 880-920℃(ib puag ncig thoob plaws lub thickness).
Soaking Sijhawm: Tuav li ntawm 1 teev ib 25 hli thickness, yam tsawg kawg nkaus 30 feeb.
Txias: Cua txias rau chav tsev kub ntawm tus nqi tswj kom tsis txhob muaj qhov tawv tawv heev.
Lub hom phiaj: Refines ferrite-pearlite qauv, txhim khu ductility, thiab xyuas kom meej raws li cov khoom siv tom qab- xa.
Yog tias tom qab-Kev kho cua sov yog xav tau (piv txwv li, tom qab kub sib sau), rov- normalize kom muaj zog. Tsis txhob quenching tshwj tsis yog tias tau teev tseg, vim nws tuaj yeem hloov cov tawv tawv.
Vuam Cov Txheej Txheem Kev Kho Hniav Kub
Preheating: Tsis tas yuav tsum muaj thicknesses tsawg dua los yog sib npaug li 50 hli; pom zoo 100-150℃rau cov ntu tuab kom tiv thaiv kev sib tsoo txias, raws li CEV Tsawg dua lossis sib npaug rau 0.48.
Interpass kub: Ntau tshaj 200℃los khaws cov nplej zoo.
Tshaj tawm -Kev kho cua sov (PWHT): Kev ntxhov siab xaiv tau- nyem ntawm 550-650℃rau 1 teev ntawm 25 hli tuab, ua raws li qhov txias txias. Feem ntau tsis xav tau vim tsis muaj hardenability.
Kub txoj kevUa haujlwm siab tshaj 850 degree; re- normalize yog tias qhov kub thiab txias poob qis dua 720℃.
Yuav tsum sab laj EN 1011-2 rau kev pom zoo vuam. Gneesteel muab cov phiaj xwm ua kom zoo rau cov txheej txheem no kom txo qis kev xav tau kev kho cua sov.
FAQ:
S420N txhais li cas?
S= Qauv, 420=420 MPa tawm los, N=Normalized, kuaj ntawm -20℃.
Puas yog S420N zoo ib yam li S420NL?
Tsis yog - S420N raug kuaj ntawm -20 degree, S420NL ntawm -50℃rau kev siv arctic.
Dab tsi yog ASTM sib npaug ntawm S420N?
A572 Qib 65- normalized, 450 MPa tawm los.
Puas yog S420NC yog qib tiag?
Tsis yog - tej zaum yuav yog typo. Siv S420N lossis S420MC (thermomechanical).
S420N puas tuaj yeem welded yam tsis muaj preheating?
Yesup rau 50 hli vim CEV Tsawg dua los yog sib npaug rau 0.48; siv tsawg- hydrogen fillers.
Cim npe nrov: Mechanical Properties & Chemical Composition ntawm S460N, Tuam Tshoj Mechanical Properties & Chemical Composition ntawm S460N manufacturers, lwm tus neeg, Hoobkas
