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MERJENJE TRDOTE KOVIN

MERJENJE TRDOTE KOVIN. - BRINELL - VICKERS - ROCKWELL. BRINELL. ENAČBA ZA IZRAČUN. HBS ali HBW = 0,102F/S S= ¶ Dh HBS = jeklena kroglica HBW= karbidna trdina. PRAVILNOST MERITEV. 150 < HB. d. > 150HB. min4d. POMANKLJIVOSTI.

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MERJENJE TRDOTE KOVIN

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  1. MERJENJE TRDOTE KOVIN - BRINELL - VICKERS - ROCKWELL

  2. BRINELL

  3. ENAČBA ZA IZRAČUN • HBS ali HBW = 0,102F/S S=¶Dh • HBS = jeklena kroglica • HBW= karbidna trdina

  4. PRAVILNOST MERITEV 150 < HB d > 150HB min4d

  5. POMANKLJIVOSTI - Pušča na površini merjencev prevelike odtiske –ni primerna za precizne izdelke – zobnike,vijake…- Zahteva več časa v primerjavi HV in HR PREDNOSTI • Ekonomičnost – cena kroglice cenejša kot diamantna piramida merjenje izdelkov, ki niso mersko precizni

  6. SHEMA MERILNIKA

  7. VICKERS KOT α JE ENAK 136°, d1 IN d2 STA DIAGONALI VTISKA

  8. PRAVILNOST MERITEV Lahke kovine,svinec ,kositer Jeklo,baker in bakrove zlitine

  9. PREDNOSTI • Zaradi manjše sile F omogoča določanje trdote zelo tankih slojev- majhne poškodbe na merjencu

  10. ROCKWELL

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