40CrNiMo bir wareeg ah oo kulul

Birta 40CrNiMoA waxaa loo isticmaalaa daminta iyo heerkulka, waxaana loo isticmaalaa in lagu soo saaro qaybo muhiim ah oo u baahan caag wanaagsan, xoog sare iyo cabbir weyn. Tusaale ahaan, mashiinnada culeyska culus ee mashiinnada culeyska culus, mashiinnada marawaxadaha uumiga leh ee dhexroorkoodu ka weyn yahay 250 mm, daabadaha, gudbinta, xirayaasha, xargaha, geerka, iwm. °C.
Taxanaha birta-daawaha hooseeya ee Chrome-Moly wuxuu ka kooban yahay 0.5% - 9% Cr iyo 0.5% - 1% Mo iyo in ka yar 0.20% kaarboon. 40CrNiMoA, 4340 iyo SNCM439 waa agabka birta chromoly-ga ah ee hooseeya ee heerarka kala duwan.

4340 iyo SNCM439 waa halbeeg ka yimid Ameerika iyo Jabbaan siday u kala horreeyaan. Xaaladaha intooda badan waxay noqon karaan qalab kale, ilaa ay jirto qoraal gaar ah ama loo isticmaalo ujeeddo gaar ah. Kala duwanaanshahooda ayaa inta badan ka jira walxo kiimiko ah, faahfaahinta ayaa muujisay sida soo socota:

Heerarka	GB	AISI	JIS
Qalab	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
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

40CrNiMoA Alloy Steel Guryaha Mechanical

• Awoodda wax-soosaarka: ≥ 835 MPa
• Xoogga xajinta: ≥ 980 MPa
• Kordhinta: ≥12%
• Heerka hoos u dhaca aagga: ≥55%
• Saamaynta tamarta nuugista: ≥ 78 J
• Qallafsanaanta Qalabka Brinell: ≤ 269 (Usha birta ee la dajiyay ama heerkulkeedu sarreeyo)
• Cabbirka Tusaalaha: 25mm

Tilmaamaha daaweynta kulaylka

• Heerkulka ugu horreeya ee deminta: 850 °C (Quenchant-saliid)
• Heerkulka kuleylka kuleylka: 600 °C (Quenchant-biyo, saliid)

Waxa loo adeegsaday halka looga baahan yahay qaybo hantida adkaysi u saraysa sida   faashashka culayska culus, shafka, geerka culayska culus, biinanka, biinanka, birta, birta, biinanka, biinanka, xidhmooyinka, biinanka, biinanka, xidhmooyinka xidhidhiyaha. Birtan daawaynta sare leh ayaa si weyn looga isticmaalay meelaha ay ka midka yihiin warshadaha kiimikada batroolka, baabuurta, qalabka tamarta uumiga iyo adeegyada kale ee heerkulka sare.