1. Chitsulo chozimitsidwa ndi chotenthedwa
Mayeso a kuuma kwachitsulo chozimitsidwa ndi chotenthedwa makamaka amagwiritsa ntchito Rockwell hardness tester HRC sikelo. Ngati zinthuzo ndi zoonda ndipo sikelo ya HRC siyoyenera, sikelo ya HRA ingagwiritsidwe ntchito m'malo mwake. Ngati zinthuzo ndi zoonda, masikelo olimba a Rockwell angagwiritsidwe ntchito HR15N, HR30N, kapena HR45N.
2. Pamwamba zitsulo zolimba
Pakupanga mafakitale, nthawi zina pachimake cha workpiece chimayenera kukhala cholimba bwino, pomwe pamwamba pafunikanso kukhala ndi kuuma kwakukulu komanso kukana kuvala. Pakadali pano, kuzimitsa pafupipafupi kwambiri, carburization yamankhwala, nitriding, carbonitriding ndi njira zina zimagwiritsidwa ntchito popangira mankhwala owumitsa pamtunda. Kukhuthala kwa wosanjikiza wowumitsa pamwamba nthawi zambiri kumakhala pakati pa mamilimita angapo ndi mamilimita angapo. Pazinthu zomwe zili ndi zigawo zowuma pamwamba, masikelo a HRC angagwiritsidwe ntchito kuyesa kuuma kwawo. Pazitsulo zowumitsa zapakatikati, mamba a HRD kapena HRA angagwiritsidwe ntchito. Pazigawo zopyapyala zowumitsa pamwamba, masikelo olimba a Rockwell HR15N, HR30N, ndi HR45N akuyenera kugwiritsidwa ntchito. Pazigawo zowonda kwambiri, muyenera kugwiritsa ntchito micro Vickers hardness tester kapena ultrasonic hardness tester.
3. Chitsulo chachitsulo, chitsulo chokhazikika, chitsulo chochepa
Zida zambiri zachitsulo zimapangidwa mokhazikika kapena mokhazikika, ndipo mbale zina zoziziritsa zozizira zimayikidwanso molingana ndi magawo osiyanasiyana a annealing. Kuyesa kuuma kwa zitsulo zosiyanasiyana zomangira nthawi zambiri kumagwiritsa ntchito masikelo a HRB, ndipo nthawi zina masikelo a HRF amagwiritsidwanso ntchito ngati mbale zofewa komanso zoonda. Pa mbale zoonda, zoyesera zolimba za Rockwell HR15T, HR30T, ndi HR45T ziyenera kugwiritsidwa ntchito.
4. Chitsulo chosapanga dzimbiri
Zida zachitsulo zosapanga dzimbiri nthawi zambiri zimaperekedwa m'maboma monga annealing, quenching, tempering, ndi njira yolimba. Miyezo yapadziko lonse imafotokoza za kuuma kwapamwamba ndi kutsika kofananira, ndipo kuyesa kuuma nthawi zambiri kumagwiritsa ntchito masikelo a Rockwell hardness tester HRC kapena HRB. Sikelo ya HRB idzagwiritsidwa ntchito ngati chitsulo chosapanga dzimbiri cha austenitic ndi ferritic, sikelo ya HRC ya Rockwell hardness tester idzagwiritsidwa ntchito ngati martensite ndi mvula yowumitsa zitsulo zosapanga dzimbiri, ndipo sikelo ya HRN kapena HRT ya Rockwell hardness tester idzagwiritsidwa ntchito ngati zitsulo zosapanga dzimbiri zokhala ndi mipanda yopyapyala ndi zida zamapepala zokhala ndi makulidwe osakwana 1 ~ 2mm.
5. Chitsulo chopanga
Mayeso a Brinell hardness test nthawi zambiri amagwiritsidwa ntchito ngati zitsulo zopangidwa ndi chitsulo, chifukwa microstructure yachitsulo chosakanizidwa sichikhala yunifolomu mokwanira, ndipo kuyesa kwa Brinell hardness indentation ndi kwakukulu. Chifukwa chake, kuyesa kwa kuuma kwa Brinell kumatha kuwonetsa zotsatira zonse za microstructure ndi katundu wa magawo onse azinthu.
6. Chitsulo choponyera
Zida zachitsulo zotayira nthawi zambiri zimadziwika ndi mawonekedwe osagwirizana ndi njere zolimba, kotero Brinell hardness test nthawi zambiri amatengera. Rockwell hardness tester itha kugwiritsidwa ntchito poyesa kuuma kwa zida zina zachitsulo. Kumene kulibe malo okwanira pagawo laling'ono la tirigu wabwino wa Brinell kuuma kuuma kwa mayeso, sikelo ya HRB kapena HRC nthawi zambiri ingagwiritsidwe ntchito kuyesa kuuma, koma ndi bwino kugwiritsa ntchito sikelo ya HRE kapena HRK, chifukwa masikelo a HRE ndi HRK amagwiritsa ntchito mipira yachitsulo ya 3.175mm m'mimba mwake, yomwe imatha kupeza kuwerenga kwapakati kuposa mipira yachitsulo ya 1.58.8mm.
Zida zachitsulo zolimba zosungunuka nthawi zambiri zimagwiritsa ntchito Rockwell hardness tester HRC. Ngati zinthuzo sizili zofanana, deta yambiri imatha kuyesedwa ndi mtengo wapakati wotengedwa.
7. Sintered carbide (hard alloy)
Kuyesa kuuma kwa zida zolimba za alloy nthawi zambiri kumangogwiritsa ntchito sikelo ya Rockwell hardness tester HRA.
8. Ufa
Nthawi yotumiza: Jun-02-2023
