40CrNiMo kub dov steel puag ncig tuav

40CrNiMoA steel yog siv tom qab quenching thiab tempering, thiab yog siv los tsim cov khoom tseem ceeb uas xav tau cov yas zoo, siab zog thiab loj loj. Piv txwv li, cov shafts hnyav hauv cov tshuab ua haujlwm hnyav, chav turbine shafts nrog diameters ntau dua 250 mm, cov hniav, kev sib kis, fasteners, crankshafts, zog, thiab lwm yam, kuj tuaj yeem siv rau rotor shafts thiab cov hniav ua haujlwm ntawm qhov kub siab tshaj 400. °C.
Chrome-Moly low alloy steel series muaj 0.5% - 9% Cr thiab 0.5% - 1% Mo thiab qis dua 0.20% carbon. 40CrNiMoA, 4340 thiab SNCM439 yog cov khoom siv hlau tsis tshua muaj chromoly los ntawm cov qauv sib txawv.

4340 thiab SNCM439 yog cov qauv los ntawm Asmeskas thiab Nyij Pooj. Feem ntau lawv tuaj yeem ua lwm yam ntaub ntawv, tshwj tsis yog muaj daim ntawv tshwj xeeb lossis siv rau lub hom phiaj tshwj xeeb. Lawv qhov sib txawv tsuas yog muaj nyob rau hauv cov ntsiab lus chemical, cov ntsiab lus tau qhia raws li hauv qab no:

Cov qauv	GB	AISI	JIS
Khoom siv	40CrNiMoA	4340	SNCM439 (NCM8)
C	0.37~0.44	0.38~0.43	0.36~0.43
Si	0.17~0.37	0.15~0.35	0.15~0.35
Mn	0.50~0.80	0.60~0.80	0.60~0.90
P	≤ 0.025	≤ 0.035	≤ 0.030
S	≤ 0.025	≤ 0.040	≤ 0.030
Cr	0.60~0.90	0.70~0.90	0.60~1.00
Ni	1.25~1.65	1.65~2.00	1.60~2.00
Mo	0.15~0.25	0.20~0.30	0.15-0.30 Nws

40CrNiMoA Alloy Steel Mechanical Properties

• Tawm lub zog: ≥835 MPa
• Tensile zog: ≥ 980 MPa
• Elongation: ≥12%
• Tus nqi txo qis hauv cheeb tsam: ≥55%
• Kev cuam tshuam absorbing zog: ≥ 78 J
• Khoom siv Brinell Hardness: ≤ 269 (Annealed lossis kub tempered steel pas nrig)
• Qauv loj: 25mm

Kev kho cua sov specification

• Thawj quenching cua sov: 850 ° C (Quenchant- roj)
• Tempering cua sov: 600 ° C (Quenchant - dej, roj)

Nws yog siv rau qhov uas yuav tsum tau muaj zog tensile thiab zoo hnav-tiv taus cov khoom xws li cov khoom hnyav hnyav, ncej, lub zog hnyav, spindles, pins, studs, bolts, couplings, sprockets, pinions, torsion bars, txuas rods. Cov hlau alloy siab tensile no tau siv dav hauv thaj chaw xws li kev lag luam petrol chemical, automotive, steam power equipment and other high temperature services.