1. Chitsulo chozimitsidwa ndi chofewa
Mayeso a kuuma kwa chitsulo chozimitsidwa ndi chotenthetsera amagwiritsa ntchito sikelo ya Rockwell hardness tester HRC. Ngati chipangizocho ndi choonda ndipo sikelo ya HRC si yoyenera, sikelo ya HRA ingagwiritsidwe ntchito m'malo mwake. Ngati chipangizocho ndi choonda, sikelo ya Rockwell hardness pamwamba pa HR15N, HR30N, kapena HR45N ingagwiritsidwe ntchito.
2. Chitsulo cholimba pamwamba
Mu mafakitale opanga, nthawi zina pakatikati pa ntchitoyo pamafunika kukhala ndi kulimba kwabwino, pomwe pamwamba pake pamafunikanso kukhala ndi kuuma kwambiri komanso kukana kukalamba. Pankhaniyi, kuzima pafupipafupi, kuyika mankhwala m'thupi, kuyika nitriding, kuyika kaboni ndi njira zina zimagwiritsidwa ntchito pochiza kuuma pamwamba pa ntchitoyo. Kukhuthala kwa gawo lolimba pamwamba nthawi zambiri kumakhala pakati pa mamilimita angapo ndi mamilimita angapo. Pazinthu zomwe zili ndi zigawo zokhuthala pamwamba, masikelo a HRC angagwiritsidwe ntchito kuyesa kuuma kwawo. Pa zitsulo zolimba pamwamba, masikelo a HRD kapena HRA angagwiritsidwe ntchito. Pa zigawo zoonda zolimbitsa pamwamba, masikelo olimba a Rockwell pamwamba HR15N, HR30N, ndi HR45N ayenera kugwiritsidwa ntchito. Pa zigawo zolimba pamwamba, choyesa kuuma cha micro Vickers kapena choyesa kuuma kwa ultrasonic chiyenera kugwiritsidwa ntchito.
3. Chitsulo cholumikizidwa, chitsulo chokhazikika, chitsulo chofatsa
Zipangizo zambiri zachitsulo zimapangidwa mu mkhalidwe wokhazikika kapena wokhazikika, ndipo mbale zina zachitsulo zozungulira zozizira zimayikidwanso m'magawo osiyanasiyana malinga ndi madigiri osiyanasiyana a kukhazikika. Kuyesa kuuma kwa zitsulo zosiyanasiyana zokhazikika nthawi zambiri kumagwiritsa ntchito masikelo a HRB, ndipo nthawi zina masikelo a HRF amagwiritsidwanso ntchito pa mbale zofewa komanso zopyapyala. Pa mbale zopyapyala, zoyesa kuuma za Rockwell HR15T, HR30T, ndi HR45T ziyenera kugwiritsidwa ntchito.
4. Chitsulo chosapanga dzimbiri
Zipangizo zosapanga dzimbiri nthawi zambiri zimaperekedwa m'malo monga kupopera, kuzima, kutenthetsa, ndi yankho lolimba. Miyezo ya dziko imatchula kuchuluka koyenera kwa kuuma kwapamwamba ndi kotsika, ndipo kuyesa kuuma nthawi zambiri kumagwiritsa ntchito Rockwell hardness tester HRC kapena HRB scales. HRB scale iyenera kugwiritsidwa ntchito pa austenitic ndi ferritic stainless steel, HRC ya Rockwell hardness tester iyenera kugwiritsidwa ntchito pa martensite ndi precipitation harding stainless steel, ndipo HRN scale kapena HRT ya Rockwell hardness tester iyenera kugwiritsidwa ntchito pa machubu achitsulo chosapanga dzimbiri okhala ndi makoma opyapyala ndi mapepala okhala ndi makulidwe osakwana 1 ~ 2mm.
5. Chitsulo chopangidwa
Mayeso a kuuma kwa Brinell nthawi zambiri amagwiritsidwa ntchito pa chitsulo chopangidwa ndi chitsulo, chifukwa kapangidwe kake ka chitsulo chopangidwa ndi chitsulo sikofanana mokwanira, ndipo kupendekeka kwa mayeso a kuuma kwa Brinell ndi kwakukulu. Chifukwa chake, mayeso a kuuma kwa Brinell amatha kuwonetsa zotsatira zonse za kapangidwe kake ndi mawonekedwe a ziwalo zonse za chinthucho.
6. Chitsulo chopangidwa ndi pulasitiki
Zipangizo zachitsulo chopangidwa ndi chitsulo nthawi zambiri zimadziwika ndi kapangidwe kosagwirizana komanso tirigu wokhuthala, kotero mayeso a kuuma kwa Brinell nthawi zambiri amagwiritsidwa ntchito. Choyesera kuuma kwa Rockwell chingagwiritsidwe ntchito poyesa kuuma kwa zinthu zina zogwirira ntchito zachitsulo chopangidwa ndi chitsulo. Pamene palibe malo okwanira pa gawo laling'ono la kuumba tirigu wabwino kwambiri poyesa kuuma kwa Brinell, sikelo ya HRB kapena HRC nthawi zambiri ingagwiritsidwe ntchito poyesa kuuma, koma ndi bwino kugwiritsa ntchito sikelo ya HRE kapena HRK, chifukwa sikelo ya HRE ndi HRK imagwiritsa ntchito mipira yachitsulo ya mainchesi 3.175mm, yomwe imatha kupeza mawerengedwe abwino kuposa mipira yachitsulo ya mainchesi 1.588mm.
Zipangizo zolimba zofewa zofewa nthawi zambiri zimagwiritsa ntchito Rockwell hardness tester HRC. Ngati zinthuzo sizili zofanana, deta yambiri imatha kuyezedwa ndikutengedwa mtengo wapakati.
7. Sintered carbide (cholimba alloy)
Kuyesa kuuma kwa zinthu zolimba nthawi zambiri kumagwiritsa ntchito sikelo ya Rockwell hardness tester HRA yokha.
8. Ufa
Nthawi yotumizira: Juni-02-2023
