20CrMnMo gbona ti yiyi irin yika ifi

Ti o dara gbona processing išẹ, normalizing lẹhin kan ti o dara Ige išẹ, lẹhin quenching ati tempering pẹlu ti o dara darí-ini ati kekere otutu ikolu toughness, lẹhin carburizing ni ga flexural agbara ati ki o wọ resistance, sugbon ko dara weldability, lati daradara warmed soke ṣaaju ki o to alurinmorin, lẹhin alurinmorin yẹ ki o jẹ binu. Ti a lo ni igbagbogbo ni awọn ibeere iṣelọpọ ti líle dada giga, resistance yiya ti o dara jẹ awọn ẹya carburizing pataki, gẹgẹbi awọn jia, ọpa camshafts,

Iṣọkan Kemikali:
Erogba C: 0.17 ~ 0.23
Si Si: 1.17 ~ 1.37
Mn Mn: 0.90 ~ 1.20
Sulfur S: lati gba akoonu to ku ≤0.035
Phosphorus P: lati gba akoonu to ku ≤0.035
Chromium Cr: 1.10 ~ 1.40
Ni: lati gba akoonu to ku ≤0.030
Cu: lati gba akoonu to ku ≤0.030
Mo Mo: 0.20 ~ 0.30
Awọn ohun-ini ẹrọ:
Agbara fifẹ σb (MPa): ≥1175 (120)
Agbara ikore σs (MPa): ≥885 (90)
Ilọsiwaju δ5 (%): ≥10
Idinku ψ (%): ≥45
Agbara ipa Akv (J): ≥55
Ipa lile αkv (J / cm2): ≥69 (7)
Lile: ≤217HB
Iwọn ayẹwo: Iwọn ayẹwo jẹ 15mm inira
Itọju igbona ati awọn pato microstructure:
Awọn alaye itọju ooru: quenching 850 ℃, itutu epo; tempering 200 ℃, omi-tutu, air-tutu.
Microstructure: tempered martensite.
Ifijiṣẹ ipo: lati ooru itọju (normalizing, annealing tabi tempering) tabi laisi ooru itọju ifijiṣẹ, awọn ifijiṣẹ ipo yẹ ki o wa ni pato ninu awọn guide.