1. Q: Dab tsi txhais tau tias EN10297-1 C15E steel tubes, thiab lawv cov kev siv tseem ceeb yog dab tsi?
A:
Khoom siv Standard:Txias- kos seamless precision raj hauv qabTS EN 10297-1, ua los ntawmC15E(ib qho tsawg-cov ntaub ntawv carbon- hardening steel nrog tswj cov ntsiab lus sulfur).
Cov khoom tseem ceeb:
Cov ntsiab lus carbon (0.12-0.18%):Sib npaug machinability thiab tom qab-kho kho hardness.
Sulfur (0.020-0.040%):Txhim kho machinability los ntawm kev txhawb nqa chip-breaking.
Daim ntawv thov:
Automotive:Iav ncej, pinions, thiab bushings (post-carburizing).
General Engineering:Hydraulic cylinders thiab qis -cov khoom siv kev ntxhov siab.
2. Q: Cov khoom siv dab tsi yuav tsum tau C15E cov raj ua tau raws li EN10297-1?
A:
Tensile zog:400-550 MPa (kev kho mob ntxiv).
Yield zog (Rp0.2):Ntau tshaj lossis sib npaug li 300 MPa.
Elongation (A₅):Ntau dua lossis sib npaug li 18% (ua kom muaj kev ua tau zoo).
Hardness:130–190 HB (raws li -xa); post-carburizing nto hardness ncav cuagHRC 58–62.
Impact Toughness:Ntau dua lossis sib npaug ntawm 35 J ntawm RT (EN ISO 148-1).
3. Q: Kev kho cua sov li cas txhim kho C15E raj kev ua haujlwm?
A:
Txheej txheem Carburizing:
Gas Carburizing:920-950℃rau 4-6 teev (qhov tob: 0.8-1.2 hli).
Quenching:Cov roj txias txias kom tsim tau martensite.
Tsawg-Tshav Kub Kub:150-200℃kom txo brittleness.
Qhov tshwm sim:
Nto:HRC 58–62 (hnav-resistant).
Core:Ua kom tawv (HRC 25–35).
4. Q: Cov tshuaj muaj pes tsawg leeg ntawm C15E yog dab tsi, thiab leej faj cuam tshuam nws cov khoom li cas?
A:
Alloy Composition (wt.%):
C (0.12–0.18%):Optimized rau rooj plaub- hardening.
Mn (0.30–0.60%):Txhawb hardenability.
S (0.020–0.040%):Daim ntawv MnS suav nrog txhawm rau txhim kho kev ua haujlwm.
Kev txwv impurity: P Tsawg dua lossis sib npaug li 0.035%(tiv thaiv brittleness).
5. Q: Cov kev tswj thiab cov ntawv pov thawj zoo li cas rau C15E raj?
A:
Kev Xeem Xeem:
Dimensional kam rau ua:OD ± 0.1 hli, phab ntsa thickness ± 10%.
NDT:Eddy tam sim no (EN 10246-3) lossis kuaj ultrasonic (ASTM A388).
Metallurgical Checks:Grain loj (ASTM E112, feem ntau 5-7).
Cov ntawv pov thawj:
EN 10204 3.1nrog traceable tshav kub / ntau tus lej.
ISO 9001 Covrau cov txheej txheem tswj.
