1. Q: Dab tsi yog Scope ntawm EN10297-1 C15R steel tubes, thiab lawv feem ntau siv qhov twg?
A:
Txhais:Seamless precision raj hauv qabTS EN 10297-1, ua los ntawmC15R(ib qho qis-carbon, resulfurized dawb- txiav hlau).
Cov yam ntxwv tseem ceeb:
Enhanced Machinability:Sulfur (0.020–0.040%) txhawb chip- tawg thaum machining.
Case-Hardening Peev Xwm:Cov pa roj carbon tsawg (0.12-0.18%) tso cai rau saum npoo tawv ntawm carburizing.
Daim ntawv thov:
Automotive:Bushings, pins, thiab qis- kev ntxhov siab shafts (post-carburizing).
Tshuab:Hydraulic Cheebtsam thiab fasteners xav tau precision machining.
2. Q: Cov khoom siv kho tshuab dab tsi yuav tsum tau ua raws li C15R cov raj EN10297-1?
A:
Tensile zog:400-550 MPa (kev kho mob tsis zoo).
Yield zog (Rp0.2):Ntau dua lossis sib npaug li 300 MPa.
Elongation (A₅):Ntau dua los yog sib npaug li 15% (kom paub meej ductility rau kev ua haujlwm).
Hardness:130–190 HB (raws li -xa); ncej-carburizing nto hardness:HRC 58–62.
Impact Toughness:Ntau dua lossis sib npaug li 30 J ntawm chav tsev kub (EN ISO 148-1).
3. Q: Kev kho cua sov ua haujlwm zoo li cas C15R raj?
A:
Txheej txheem Carburizing:
Surface Enrichment:900-950℃rau 4-8 teev (qhov tob: 0.5-1.5 hli).
Quenching:Roj txias kom ua tiav martensitic nto.
Tempering:150-200℃los txo kev ntxhov siab.
Qhov tshwm sim:
Nto:HRC 58–62 (hnav-resistant).
Core:Khaws cov tawv nqaij (HRC 20-30).
4. Q: Cov tshuaj muaj pes tsawg leeg ntawm C15R yog dab tsi, thiab vim li cas sulfur ntxiv?
A:
Alloy Design (wt.%):
C (0.12–0.18%):Balances machinability thiab hardenability.
Mn (0.30–0.60%):Ua ke nrog sulfur los ua MnS suav nrog.
S (0.020–0.040%):Txhim kho machinability los ntawm kev txo cov cuab yeej hnav.
Kev tswj hwm impurity: P Tsawg dua lossis sib npaug li 0.035%kom txo qis brittleness.
5. Q: Kev ntsuas kev ntsuas zoo li cas rau C15R raj?
A:
Kev Ntsuas Cov Txheej Txheem:
Dimensional Checks:OD kam rau ua ± 0.1 hli, phab ntsa thickness ± 10%.
NDT:Kev ntsuas tam sim no Eddy (EN 10246-3) rau qhov tsis xws luag.
Metallography:Kev txheeb xyuas qhov loj (ASTM E112, feem ntau 5-8).
Cov ntawv pov thawj:
EN 10204 3.1kev soj ntsuam daim ntawv pov thawj.
ISO 9001 Covrau manufacturing sib xws.
