1. Q: Lub luag haujlwm tseem ceeb ntawm EN10297-1 16MnCr5 steel tubes yog dab tsi?
A:
Khoom siv profile:Seamless precision raj hauv qabTS EN 10297-1, ua los ntawm16MnCr5(ib rooj plaub-hardening chromium-manganese steel).
Kev siv tseem ceeb:
Automotive:Iav shafts, synchronizer rings, thiab kis tau tus mob (post-carburizing).
Industrial:Siab -cov kabmob muaj zog, hydraulic pistons, thiab cov khoom siv uas yuav tsum tau hnav tsis kam.
Qhov zoo:
Zoo heev hardenability (HRC 58-62 nto tom qab carburizing).
Kev qaug zog zoo (Ntau dua lossis sib npaug ntawm 500 MPa ntawm 10⁶ cycles).
2. Q: Cov cuab yeej siv tshuab dab tsi yog tswj hwm los ntawm EN10297-1 rau 16MnCr5 raj?
A:
Raws li -Delivered State (Annealed):
Tensile zog:600-800 MPa.
Yield zog (Rp0.2):Ntau dua lossis sib npaug li 450 MPa.
Elongation (A₅):Ntau dua lossis sib npaug li 12%.
Hardness:170–220 HB.
Ncej -Carburizing:Nto hardnessHRC 58–62, core toughness tswj (~HRC 30-40).
3. Q: Kev kho cua sov li cas rau 16MnCr5 raj rau kev ua haujlwm zoo?
A:
Case- Txheej Txheem Hardening:
Carburizing:880-920℃rau 4-10 teev (qhov tob: 0.8-1.5 hli).
Quenching:Roj txias (qhov tseem ceeb ntawm qhov txias txias: Ntau dua lossis sib npaug li 50℃/ s).
Tempering:150-200℃kom txo brittleness.
Microstructure:Tempered martensite nto nrog nplua carbide; ferrite -pearlite core.
4. Q: Dab tsi yog qhov kev tsim qauv hlau alloy tom qab 16MnCr5 qhov muaj pes tsawg leeg?
A:
Chemical Composition (wt.%):
C (0.14–0.19%):Balances core ductility thiab nto hardness.
Cr (0.80-1.10%):Txhim kho hardenability thiab hnav tsis kam.
Mn (1.00–1.30%):Stabilizes austenite kom sib sib zog nqus hardening.
Kev txwv impurity: P/S Tsawg dua lossis sib npaug li 0.025%(minimizes brittleness).
5. Q: Cov ntawv pov thawj zoo thiab cov txheej txheem xeem siv li cas?
A:
Kev kuaj:
NDT:Kev ntsuam xyuas ultrasonic (EN 10246-1) rau cov teeb meem sab hauv.
Metallurgical:Grain loj (ASTM E112, 5-8), suav nrog (ASTM E45).
Cov ntawv pov thawj:
EN 10204 3.2nrog tag nrho traceability.
TIAB SA 16949rau kev ua raws li automotive.
