Ixabiso loBulukhuni beSixhobo seNsimbi yeTungsten okanye isixhobo sokugaya ingxubevange

Ukuqina kukukwazi kwesixhobo ukuxhathisa izinto ezinzima ezicinezela kumphezulu wayo. Ngenye yezibonakaliso ezibalulekileyo zokusebenza kwezinto zetsimbi.

Ngokubanzi, okukhona ukuqina kokuqina, kokukhona ukuxhathisa ukunxiba ngcono. Izalathi zokuqina ezidla ngokusetyenziswa yiBrinell hardness, Rockwell hardness kunye neVickers hardness.

Ukuqina kweBrinell (HB)

Cinezela ibhola yensimbi eqinisiweyo yobungakanani obuthile (ngokuqhelekileyo i-10 mm ububanzi) kwindawo yezinto eziphathekayo kunye nomthwalo othile (ngokubanzi i-3000 kg), kwaye uyigcine ixesha elithile. Emva kokukhulula, umlinganiselo womthwalo kwindawo yokufakela yinombolo yobunzima beBrinell (HB), kunye neyunithi i-kilogram force / mm2 (n / mm2).

2. Ukuqina kweRockwell (HR)

Xa i-HB> 450 okanye isampulu incinci kakhulu, umlinganiselo wobulukhuni be-Rockwell awunakusetyenziswa endaweni yovavanyo lobulukhuni be-Brinell. I-cone yedayimane ene-angle ephezulu yee-degrees ezingama-120 okanye ibhola yensimbi enobubanzi be-1.59 kunye ne-3.18 mm. Icinezelwe ebusweni bezinto eziphantsi komthwalo othile, kwaye ubunzima bezinto eziphathekayo bubalwa ukusuka kubunzulu be-indentation. Ngokobunzima obahlukeneyo bemathiriyeli yovavanyo, inokubonakaliswa ngezikali ezintathu ezahlukeneyo:

450 okanye isampulu incinci kakhulu, umlinganiselo wobulukhuni be-Rockwell awunakusetyenziswa endaweni yovavanyo lobulukhuni be-Brinell. I-cone yedayimane ene-angle ephezulu yee-degrees ezingama-120 okanye ibhola yensimbi enobubanzi be-1.59 kunye ne-3.18 mm. Icinezelwe ebusweni bezinto eziphantsi komthwalo othile, kwaye ubunzima bezinto eziphathekayo bubalwa ukusuka kubunzulu be-indentation. Ngokobunzima obahlukeneyo bemathiriyeli yovavanyo, inokubonakaliswa ngezikali ezintathu ezahlukeneyo:

I-HRA: Ubunzima obufunyenwe ngumthwalo we-60 kg kunye ne-diamond cone indenter isetyenziselwa izinto ezinobunzima obuphezulu kakhulu (ezifana ne-cemented carbide).

I-HRB: Ubunzima obufunyenwe ngokuqiniswa kwebhola yentsimbi kunye nobubanzi be-1.58 mm kunye nomthwalo we-100 kg. Isetyenziselwa izinto ezinobulukhuni obuphantsi.(ezifana nentsimbi ene-annealed, iron cast, njl.).

I-HRC: Ubunzima obufunyenwe ngumthwalo we-150 kg kunye ne-diamond cone indenter isetyenziselwa izinto ezinobunzima obuphezulu (njengentsimbi ecinyiweyo).

3. Vickers hardness (HV)