ASTM H12 Cov cuab yeej steel|1.2605|X35CrWMoV5|SKD62|BH12
AISI h12 Cov cuab yeej hlau yog cov hlau ua haujlwm kub uas muaj 4.75 ~ 5.5 feem pua ntawm cov ntsiab lus chromium. H12 Tool steel muaj tsawg dua vanadium (0.2~0.5%) dua li H13 kub ua hauj lwm Tool steel (0.8~1.2%), uas yog dav siv. ASTM / AISI H12 steel yog ib qho sib sib zog nqus hardening, cua hardening hlau nrog tsawg qhov me me hloov thaum kho cua sov. H12 Tool steel muaj qhov ua haujlwm zoo rau thermal qaug zog tawg (kub tawg) thiab ua haujlwm zoo heev rau kev tawg loj thiab thermal poob siab thaum siv dej txias. Yog li, nws tuaj yeem hais tias H-12 Cov cuab yeej steel feem ntau muaj cov yam ntxwv hauv qab no:
Zoo hnav tsis kam, siab zog ntawm qhov kub thiab txias.
Zoo homogeneity thiab siab toughness.
Ultrafine qauv tsis grain ciam carbides.
Cov duab ntawm kev suav nrog yog tswj tau thiab kev huv huv yog siab.
Khoom siv: 1.2605
EN qib: X35CrWMoV5
Cov txheej txheem ua haujlwm: ENISO4957 Cov cuab yeej steel
H12 Tool Steel Chemical muaj pes tsawg leeg:
C0.32-0.4
Si08-1.2
Mn02-0.5
Pmax 0.03
Smax 0.02
Cr4 75-5.5
Mo1.25-1.6
W1.1-1.6
V0.2-0.5
Hardness HB: 229
Mechanical zog ntawm kub ua hauj lwm Tool steel
Elastic modulus [103 x N / mm2]: 207
Qhov ceev [g/cm3]: 7.84
Thermal conductivity coefficient [W/mK]: 18.9
Linear thermal expansion coefficient 10-6 oC-1
Kev kho cua sov ntawm Tool steel
annealing
Maj mam thiab sib npaug kub H-12 steel rau 845-900 degree , thiab cub txias rau 540 degree ntawm tus nqi ntawm 10-20 degree /hr. Hardness HB 229 max
Kev ntxhov siab
Kev tshem tawm kev ntxhov siab ntawm kev ua haujlwm kev ntxhov siab yuav tsum tau ua los ntawm cua sov H12 steel mus txog 650oC, tuav nws rau 1-2 teev, thiab tom qab ntawd cua txias. Ua qhov haujlwm no kom txo qis deformation thaum kho cua sov.
Hardening
Preheating (1): Thaum tshav kub kub H-12 steel mus txog 540 ~ 650 degree thiab tuav 30 feeb txhua 25 hli.
Preheating (2): Thaum tshav kub kub H12 Tool steel mus txog 845 ~ 870 degree, thiab khaws cia rau 30 feeb txhua txhua 25 hli.
Austenitization: Thaum tshav kub kub hlau H12 txog li 1010 ~ 1050 degree thiab tuav rau 30 feeb txhua 25 hli.
Quenching: Los ntawm roj los yog cua.
tempering
Tempering kub: 520-700oC, rwb thaiv tsev yam tsawg 2 teev, cua txias dual tempering.
Daim ntawv thov ntawm AISI H12 Tool steel
AISI H12 kub ua hauj lwm Tool steel feem ntau yog siv rau kub ua hauj lwm daim ntaub ntawv uas yuav tsum tau siab tshaj plaws tiv thaiv rau tawg. Cov kev siv ntawm hom no muaj xws li:
Extrusion kev lag luam: Extrusion pwm thiab liners, extrusion cuab yeej
Forging kev lag luam: tsim pwm, stamping pwm
Kev lag luam tuag casting: nyuaj alloy pwm
Kev lag luam cuab yeej: kub punches, kub txiab, txias dov ncaj yob
