1. Cov khoom sib xyaw & cov khoom tseem ceeb
Q:Dab tsi txhais cov tshuaj / txhua yam khoom ntawm 41Cr4?
A:
Chemical (wt%):
C: 0.38–0.45 | Cr: 0.90–1.20 | Mn: 0.60–0.90 | P:Tsawg dua lossis sib npaug rau 0.025 |S:Tsawg dua lossis sib npaug li 0.025.
Mechanical:
Yield zog (sᵧ):Ntau tshaj lossis sib npaug rau 550 MPa |Tensile (sₜ):750-900 MPa.
Elongation (A₅):Ntau dua lossis sib npaug li 12% |Hardness:210–250 HB (raws li -quenched: 50–55 HRC).
Nco tseg:41cr4 uaCr- hlau alloynrog tshwj xeeb hardenability (Jominy xeem: Ntau tshaj los yog sib npaug rau 20mm ntawm 50HRC).
2. Kev tsim khoom & qauv ua raws
Q:Yuav ua li cas yog 41Cr4 raj tsim thiab ntawv pov thawj?
A:
Txheej txheem: Seamless nkaus xwb(kub- dov + precision txias-kos).
Kev kho cua sov:Yuav tsum tau Q&T (Quenching ntawm 850-880℃+ Tempering ntawm 500-600 degree).
Standard Scope:TS EN 10297-1 rau cov khoom siv kev ntxhov siab siab (xws li iav, ncej).
3. Dimensional Tolerances
Q:Dab tsi kam rau ua rau 41Cr4 raj?
A:
| Parameter | Ua siab ntev | Kev thuam |
|---|---|---|
| OD | ± 0.7% (min ± 0.3 hli) | Qhov tseem ceeb rau bearing fits |
| Phab ntsa Thickness | ± 7% (min ± 0.3 hli) | Ua rau qaug zog ua haujlwm |
| Kev ncaj | Tsawg dua lossis sib npaug li 1.0 mm / m | Qhov tseem ceeb rau rotating machinery |
4. Daim Ntawv Thov & Kev Txwv
Q:41Cr4 feem ntau siv nyob qhov twg?
A:
High-Qhov Ua Tau Zoo:
Iav shafts, piston pas nrig (hardened rau 45-50 HRC).
Hydraulic cylinders (tsawg dua los yog sib npaug rau 1,000 bar).
Zam:
Temperatures >550℃(kev pheej hmoo ntawm tempered martensite embrittlement).
Vuam yam tsis muaj pre/post{0}}kev kho cua sov (PWHT ntawm 600–650℃).
5. Kev lees paub zoo & ntawv pov thawj
Q:Yuav ua li cas thiaj paub tseeb?
A:
Yuav tsum xeem:
Tensile (EN ISO 6892-1)|Kev cuam tshuam (ISO 148-1 ntawm -20 degree).
NDT:100% ultrasonic (EN ISO 10893-11) + MPI (ISO 10893-8).
Cov ntawv pov thawj:EN 10204 3.2|PED 2014/68/EU (Qeb IV).
