Tshuaj muaj pes tsawg leeg thiab txhua yam khoom ntawm 20CrMo alloy yeeb nkab: ① Ob tug lej ntawm qhov pib ntawm 20CrMo alloy yeeb nkab steel tooj qhia cov ntsiab lus carbon ntawm cov hlau, qhia raws li ob peb kaum txhiab. ntawm qhov nruab nrab cov ntsiab lus carbon. Piv txwv li, 40Cr.2{{10}}CrMo alloy yeeb nkab muaj carbon 0.17~0.24 thiab silicon 0. 17 ~ 0.37, manganese 0.40 ~ 0.70, molybdenum 0.15 ~ 0.25, chromium 0.80 ~ 1.10) ② Cov ntsiab lus tseem ceeb alloying hauv cov hlau, tshwj tsis yog qee qhov micro-alloying ntsiab, feem ntau qhia hauv feem pua. Thaum qhov nruab nrab alloy cov ntsiab lus yog<1.5%, the steel number is generally marked with the element symbol instead of the content. However, in special cases where confusion is likely to occur, the number "1" can also be marked after the element symbol, such as the steel number. "12CrMoV" and "12Cr1MOV", the former has a chromium content of 0.4-0.6%, the latter has a chromium content of 0.9-1.2%, and the rest of the ingredients are the same.
Thaum qhov nruab nrab cov ntsiab lus ntawm cov ntsiab lus alloy yog ntau dua lossis sib npaug li 1.5%, Ntau dua lossis sib npaug li 2.5%, Ntau dua lossis sib npaug li 3.5% ... 2, 3, 4.., ib. Piv txwv li, 18Cr2Ni4WA. ③ Alloying ntsiab xws li vanadium V, titanium Ti, txhuas AL, boron B, thiab tsawg ntiaj teb RE nyob rau hauv hlau yog tag nrho cov micro-alloying ntsiab. Txawm hais tias cov ntsiab lus tsawg heev, lawv tseem yuav tsum tau cim rau hauv qib steel. Piv txwv li, hauv 20MnVB steel. Vanadium yog 0.07-0.12%, thiab boron yog 0.{18}}.005%. Mechanical zog ntawm 20CrMo alloy yeeb nkab: Tensile zog σb (MPa): Ntau dua los yog sib npaug rau 885 (90) Yield zog σs (MPa): Ntau dua los yog sib npaug rau 685 (70) Elongation δ5 (%): Ntau dua los yog sib npaug 12 Sectional shrinkage ψ (%): Ntau dua los yog sib npaug rau 50 Impact zog Akv (J): Ntau dua los yog sib npaug rau 78 Impact toughness tus nqi kv (J/cm2): Ntau dua lossis sib npaug rau 98 (10) Hardness: Tsawg dua los yog sib npaug rau 197HB
