S460QL1 ak S690QL1 yo trempe ak tanperaman plak asye estriktirèl pou chak EN 10025-6. Deziyasyon an presize fòs sede minimòm (460 MPa ak 690 MPa) ak sifiks "QL1" la vle di kondisyon Trempe (Q) ak Tanperaman (T) ak severite enpak lonjitidinal (L1) garanti nan tanperati ki ba (egzanp, -40 degre oswa -60 degre). Klas sa yo fèt pou estrikti soude ki gen anpil estrès, ki mande fòs siperyè ak rezistans ka zo kase, tankou nan konstriksyon lou ak machin min, enstalasyon lanmè, ak sistèm transpò avanse.
Diferans kle:
Distenksyon prensipal la se diferans konsiderab nan fòs. S460QL1 ofri yon fòs sede 460 MPa, pandan y ap S690QL1 bay yon fòs sede 690 MPa-yon ogmantasyon 50%. Sa fè S690QL1 apwopriye pou aplikasyon kote chaj ekstrèm -kapasite pote ak maksimòm rediksyon pwa yo esansyèl.
Achieving this ultra-high strength while retaining the stringent "QL1" toughness necessitates a fundamentally more advanced metallurgical approach for S690QL1. Its chemical composition involves significantly higher levels of carbon, manganese, and alloying elements like chromium, nickel, molybdenum, and boron. Consequently, S690QL1 has a dramatically higher carbon equivalent (Ceq) and crack susceptibility index compared to S460QL1. This translates to an exponential increase in fabrication complexity. Welding S690QL1 is exceptionally restrictive: it demands specially developed ultra-high-strength consumables, meticulous preheating (often >150 degre ), D ' chalè ki ba anpil, strik kontwòl tanperati interpass, epi prèske toujou swiv pa obligatwa pòs-tretman chalè soude (PWHT) pou retabli severite ak anpeche idwojèn fann nan zòn ki afekte chalè-.
Konpozisyon chimik
|
S460QL1Konpozisyon chimik |
||||||||
|
Klas |
Eleman Max (%) |
|||||||
|
C |
Si |
Mn |
P |
S |
N |
B |
Kr |
|
|
S460 QL1 |
0.20 |
0.80 |
1.70 |
0.020-0.025 |
0.010-0.015 |
0.015 |
0.005 |
1.50 |
|
Cu |
Mo |
Nb |
Ni |
Ti |
V |
Zr |
|
|
|
0.50 |
0.70 |
0.06 |
2.0 |
0.05 |
0.12 |
0.15 |
|
|
|
S690QL1Konpozisyon chimik |
||||||||
|
Klas |
Eleman Max (%) |
|||||||
|
C |
Si |
Mn |
P |
S |
N |
B |
Kr |
|
|
S690 QL1 |
0.20 |
0.80 |
1.70 |
0.020-0.025 |
0.010-0.015 |
0.015 |
0.005 |
1.50 |
|
Cu |
Mo |
Nb |
Ni |
Ti |
V |
Zr |
|
|
|
0.50 |
0.70 |
0.06 |
2.0 |
0.05 |
0.12 |
0.15 |
|
|
Pwopriyete mekanik
|
Klas |
S460QL1Pwopriyete mekanik |
|||||
|
Epesè |
Sede |
Tensile |
Elongasyon |
Enèji enpak min
|
||
|
S460 QL1 |
mm |
Min Mpa |
Mpa |
% min |
-60 |
30J |
|
3<> |
460 |
550-720 |
17 |
-60 |
30J |
|
|
50<> |
440 |
550-720 |
17 |
-60 |
30J |
|
|
100<> |
400 |
500-670 |
17 |
-60 |
30J |
|
|
Klas |
S690QL1Pwopriyete mekanik |
|||||
|
Epesè |
Sede |
Tensile |
Elongasyon |
Enèji enpak min
|
||
|
S690 QL1 |
mm |
Min Mpa |
Mpa |
% min |
-60 |
30J |
|
3<> |
890 |
940-1100 |
11 |
-60 |
30J |
|
|
50<> |
830 |
880-1100 |
11 |
-60 |
30J |
|
|
100<> |
800 |
820-1000 |
11 |
-60 |
30J |
|
