Q345C tsis tshua muaj kub steel yeeb nkab qhov chaw
Qib phab ntsa thickness mm elongation δ 5 ≥%% yield zog δ S (MPA ≥) ntsuas kub ℃
Q345A ≤ 16 21 345 tsis tas yuav tsum tau
Q345B ≤16 21 345 20
Q345C 16-35 22 ≥325 0
Qib C Si Mn PSV NB Al Ti
Q345A ≤0.20 ≤0.55 ≤1.70 ≤0.045 ≤0.045 0.02-0.15 0.015-0.060 0.02-0.20
Q345B ≤0.20 ≤0.55 ≤1.70 ≤0.040 ≤0.040 0.02-0.15 0.015-0.060 0.02-0.20
Q345C ≤0.20 ≤0.55 ≤1.70 ≤0.035 ≤0.035 0.02-0.15 0.015-0.060 ≥0.015 0.02-0.20
Feem ntau yog vim muaj cov ntsiab lus carbon thiab manganese sib txawv:
Q235-A
Cov ntsiab lus carbon C: 0.14 ~ 0.22; Mn: 0.30 ~ 0.65 hli;
Q235-B
Cov ntsiab lus carbon C: 0.12 ~ 0.20; Mn: 0.30 ~ 0.70 hli;
Nws yog siv rau carburized los yog cyanide qhov chaw uas tsis tshua muaj lub zog xav tau, xws li rub pas nrig, txuas pas nrig, nuv, ntsia liaj qhov rooj, ncej thiab vuam
Yuav tsum muaj kev txwv ntawm qhov kub thiab txias!
Tshwj xeeb tshaj yog Q345E. Kaum kaum degrees qis dua xoom.
Tsis tas li ntawd, piv nrog cov qauv qub, qhov pom tseeb tshaj plaws ntawm tus qauv tshiab yog kho Mn cov ntsiab lus hauv cov hlau los ntawm 1.0-1.60 rau ≤ 1.70, thiab tshem tawm qhov tsawg kawg nkaus tus nqi txwv ntawm ≥ 1.0.
Q345C steel yeeb nkab yog ib qho ntawm cov ntaub ntawv ntawm cov yeeb nkab steel.
Q345A, Q345B, Q345C, Q345D thiab Q345E yog cov qib zoo. Lawv nce los ntawm ib mus rau e, feem ntau yog vim qhov sib txawv ntawm qhov kub thiab txias tshwm sim los ntawm cov ntsiab lus sib txawv ntawm cov ntsiab lus micro xws li phosphorus thiab sulfur, uas sawv cev rau qhov sib txawv ntawm qhov kub thiab txias thiab cov khoom siv ntawm cov yeeb nkab tshuaj muaj pes tsawg leeg.
Q345A, tsis muaj kev cuam tshuam; Q345B, 20 ° ib txwm kub cuam tshuam; Q345C, 0 degree cuam tshuam; Q345D, yog - 20 degree cuam tshuam; Q345E yog - 40 degree cuam tshuam. Ntawm qhov sib txawv ntawm qhov kub thiab txias, qhov cuam tshuam qhov tseem ceeb kuj txawv.
Q lub zog tawm los tsis qis dua 345mp, thiab qib zoo qhia tau hais tias nws muaj cov khoom tsis huv (carbon, manganese, silicon, sulfur thiab phosphorus). Yog tus nqi ntawm impurities (cov ntsiab lus) hauv cov hlau. Tom qab A, B, C thiab D, cov ntsiab lus impurity tsawg dua
Q345A muaj phosphorus thiab sulfur tsawg dua lossis sib npaug li 0.045%
Q345B muaj phosphorus thiab sulfur tsawg dua lossis sib npaug li 0.040%
Q345C muaj phosphorus thiab sulfur tsawg dua lossis sib npaug li 0.035%
Q345D muaj phosphorus thiab sulfur tsawg dua lossis sib npaug li 0.030%
Q345E muaj phosphorus thiab sulfur tsawg dua lossis sib npaug li 0.025%
Qhov ntau phosphorus thiab sulfur impurities nyob rau hauv steel, qhov phem qhov cuam tshuam toughness
qw 345a
Q345B Akv tsis tsawg dua 34 ntawm 20 ℃
Ntawm Q345C 0 ℃, Akv yuav tsum tsis pub tsawg tshaj 34
Q345D - Akv tsis tsawg dua 34 ntawm 20 ℃
Ntawm Q345E - 40 ℃, Akv tsis tsawg dua 27
Qhov laj thawj kawg yog tias qhov txo qis ntawm P thiab s impurities hauv steel txhawb kev txhim kho ntawm kev cuam tshuam toughness ntawm qhov kub thiab txias. Ib qho yog cov tshuaj muaj pes tsawg leeg ntawm Q345 thiab lwm qhov yog cov khoom siv kho tshuab ntawm Q345
C≤0.2%, Mn 1.0-1.6%,
Si ≤0.55%,
S ≤0.35%,
P ≤0.35%,
V 0.02-0.15%,
Nb 0.015-0.06%,
0.02-0.2%,
AL ≥0.015%
Mechanical zog yog:
Yield zog: ≥345mpa (thickness hauv qab 16mm)
Tensile zog: 470-630mpa
Elongation: 22%
Lub zog cuam tshuam: ≥ 34j (kuaj ntsuas kub 0 °)
180 ° khoov kuaj:
D = 2A (thickness qis dua 16mm)
Yield zog: ≥345mpa (thickness hauv qab 16mm)
Tensile zog: 470-630mpa
Elongation: 22%
Lub zog cuam tshuam: ≥ 34j (kuaj ntsuas kub 0 °)
180 ° khoov kuaj:
D = 2A (thickness qis dua 16mm)