40CrNiMo yotentha yozungulira zitsulo zozungulira

Chitsulo cha 40CrNiMoA chimagwiritsidwa ntchito pambuyo pozimitsa ndi kutentha, ndipo chimagwiritsidwa ntchito popanga zigawo zofunika zomwe zimafuna pulasitiki yabwino, mphamvu zazikulu ndi kukula kwakukulu. Mwachitsanzo, ma shafts olemetsa m'makina olemetsa, ma turbine shafts okhala ndi mainchesi akulu kuposa 250 mm, masamba, ma transmissions, fasteners, crankshafts, magiya, ndi zina zotere, zitha kugwiritsidwanso ntchito popangira ma rotor shafts ndi masamba omwe akugwira ntchito pa kutentha kopitilira 400. °C.
Chrome-Moly low alloy steel series ili ndi 0.5% - 9% Cr ndi 0.5% - 1% Mo ndi pansi kuposa 0.20% carbon. 40CrNiMoA, 4340 ndi SNCM439 ndi otsika aloyi chromoly zitsulo zipangizo kuchokera pa mfundo zosiyanasiyana.

4340 ndi SNCM439 ndi miyezo yochokera ku America ndi Japan motsatana. Nthawi zambiri amatha kukhala zida zina, pokhapokha ngati pali cholembera chapadera kapena chogwiritsidwa ntchito mwapadera. Kusiyana kwawo kumapezeka makamaka muzinthu zamakina, tsatanetsatane wawonetsedwa motere:

Miyezo	GB	AISI	JIS
Zakuthupi	40CrNiMoA	4340	SNCM439 (SNCM8)
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
Ndi	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

40CrNiMoA Alloy Steel Mechanical Properties

• Zokolola mphamvu: ≥ 835 MPa
• Kulimba kwamphamvu: ≥ 980 MPa
• Elongation: ≥12%
• Mlingo wa kuchepetsa dera: ≥55%
• Mphamvu zotengera mphamvu: ≥ 78 J
• Kuuma kwa Brinell: ≤ 269 (Ndodo yachitsulo yopindika kapena kutentha kwambiri)
• Kukula kwachitsanzo: 25mm

Kufotokozera kwamankhwala a kutentha

• Kutentha koyamba kozimitsa: 850 °C (Quenchant-mafuta)
• Kutentha Kutentha: 600 ° C (Quenchant- madzi, mafuta)

Amagwiritsidwa ntchito pomwe pamafunika zida zolimba kwambiri komanso zolimba kuti zisavale bwino monga  ma axle olemera kwambiri, ma shaft, magiya olemetsa, masipingo, ma pin, ma bolt, ma couplings, sprockets, pinions, torsion bars, zolumikizira. Zitsulo zamtundu wa alloy zakhala zikugwiritsidwa ntchito kwambiri m'malo monga mafakitale amafuta amafuta, magalimoto, zida zamagetsi zamagetsi ndi ntchito zina zotentha kwambiri.