Chithandizo cha kutentha kwapamwamba chimagawidwa m'magulu awiri: imodzi ndi yozimitsa pamwamba ndi kutentha kwa kutentha, ndipo ina ndi mankhwala a kutentha kwa mankhwala.Njira yoyezetsa kuuma ndi motere:
1. pamwamba kuzimitsa ndi tempering kutentha mankhwala
Kuzimitsa pamwamba ndi kutenthetsa kutentha kutentha nthawi zambiri kumachitika ndi kutentha kwa induction kapena kutentha kwa lawi.Waukulu luso magawo ndi pamwamba kuuma, m`deralo kuuma ndi ogwira anaumitsa wosanjikiza kuya.Vickers hardness tester kapena Rockwell hardness tester atha kugwiritsidwa ntchito poyesa kuuma.Mphamvu yoyesera Kusankhidwa kumagwirizana ndi kuya kwachitsulo cholimba cholimba komanso kuuma kwa pamwamba kwa workpiece.Pali makina atatu olimba omwe akukhudzidwa apa.
(1) The Vickers hardness tester ndi njira yofunikira yoyesera kuuma kwa zinthu zogwiritsidwa ntchito ndi kutentha.Itha kugwiritsa ntchito mphamvu yoyesera ya 0.5-100KG kuyesa kusanjikiza kowumitsidwa kwapansi kukhala woonda ngati 0.05mm wandiweyani.Kulondola kwake ndikokwera kwambiri ndipo kumatha kusiyanitsa zida zogwiritsira ntchito kutentha.Kusiyanitsa pang'ono pakuuma kwapamtunda, kuphatikiza, kuya kwa gawo lolimba lolimba kumawonedwanso ndi Vickers hardness tester, chifukwa chake ndikofunikira kukonzekeretsa Vickers hardness tester pamayunitsi omwe amakonza kutentha kwapamwamba kapena kugwiritsa ntchito nambala yayikulu. za pamwamba kutentha mankhwala workpieces.
(2) The pamwamba Rockwell kuuma tester ndi oyeneranso kwambiri kuyesa kuuma kwa workpiece pamwamba kuzimitsidwa.Pali masikelo atatu a Rockwell hardness tester omwe mungasankhe.Itha kuyesa zida zosiyanasiyana zowumitsidwa pamwamba zomwe kuya kwake kolimba kumapitilira 0.1mm.Ngakhale kuti kulondola kwapamwamba kwa Rockwell hardness tester sikuli kofanana ndi kuyesa kwa Vickers hardness tester, ikhoza kukwaniritsa zofunikira monga njira yodziwira kasamalidwe kabwino ndi kufufuza koyenerera kwa zomera zochizira kutentha..Kupatula apo, ilinso ndi mawonekedwe a ntchito yosavuta, kugwiritsa ntchito bwino, mtengo wotsika, kuyeza kofulumira, komanso kuwerenga molunjika kwa mfundo zowuma.Rockwell hardness tester itha kugwiritsidwa ntchito kuzindikira mwachangu komanso mosawononga magulu azinthu zothira kutentha pamwamba chimodzi ndi chimodzi.Ndizofunikira kwambiri ku mafakitale opanga zitsulo ndi makina opanga makina.Pamene kutentha kwapamwamba kumawumitsidwa wosanjikiza ndi wandiweyani, Rockwell hardness tester itha kugwiritsidwanso ntchito.Pamene kutentha kutentha kuuma wosanjikiza makulidwe ndi 0.4-0.8mm, sikelo HRA angagwiritsidwe ntchito.Kuzama kwa wosanjikiza Kukapitilira 0.8mm, sikelo ya HRC ingagwiritsidwe ntchito.Ma Vickers, Rockwell ndi Rockwell amtundu wa Rockwell atatu olimba amatha kusinthidwa mosavuta kukhala wina ndi mnzake, kusinthidwa kukhala miyezo, zojambula kapena kuuma komwe kumafunidwa ndi ogwiritsa ntchito, ndipo tebulo losinthika lofananira lili mu ISO yapadziko lonse lapansi.American standard ASTM ndi Chinese standard GB/T aperekedwa.
(3) Pamene makulidwe a chiwongolero chotenthetsera kutentha ndi choposa 0.2mm, kuyesa kuuma kwa Leeb kungagwiritsidwe ntchito, koma chojambula chamtundu wa C chiyenera kusankhidwa.Poyezera, chidwi chiyenera kuperekedwa kumapeto kwa pamwamba ndi makulidwe onse a workpiece.Njira yoyezera iyi ilibe Vickers ndi Rockwell The hardness tester ndi yolondola, koma ndiyoyenera kuyeza pa malo fakitale.
2. mankhwala kutentha mankhwala
Mankhwala kutentha mankhwala ndi kulowerera pamwamba pa workpiece ndi maatomu a chinthu chimodzi kapena zingapo mankhwala, potero kusintha mankhwala zikuchokera, kapangidwe ndi ntchito pamwamba pa workpiece.Pambuyo pozimitsa ndi kutentha kwapansi kutentha, pamwamba pa workpiece imakhala ndi kuuma kwakukulu komanso kuvala kukana.ndi kukhudzana ndi kutopa mphamvu, ndipo pachimake cha workpiece ali ndi mphamvu mkulu ndi kulimba.Zaumisiri zazikulu magawo a mankhwala kutentha mankhwala workpiece ndi kuya kwa wosanjikiza ndi kuuma pamwamba.Mtunda womwe kuuma kumatsikira mpaka 50HRC ndiye kuzama kolimba kolimba.Kuyesa kuuma kwa pamwamba kwa zinthu zogwiritsidwa ntchito ndi kutentha kwa mankhwala kumafanana ndi kuyesa kuuma kwa zida zozimitsidwa ndi kutentha.Oyesa kuuma kwa Vickers, oyesa kuuma kwa Rockwell kapena Rockwell kuuma angagwiritsidwe ntchito.Woyesa kuuma kuti azindikire, makulidwe okha a nitriding thicker ndiowonda, nthawi zambiri osapitilira 0.7mm, ndiye kuti Rockwell hardness tester singagwiritsidwe ntchito.
3. mankhwala kutentha m'deralo
Ngati m`deralo kutentha mbali mankhwala amafuna mkulu m`deralo kuuma, m`deralo kuzimitsa kutentha mankhwala angathe kuchitidwa mwa Kutenthetsa kupatsidwa ulemu, etc. mbali zotere zimafunika chizindikiro malo a quenching kutentha mankhwala ndi m`deralo kuuma mtengo pa kujambula, ndi kuuma. kuyesa kwa magawo kuyenera kuchitidwa m'dera lomwe mwasankha, chida choyezera kuuma chingagwiritsidwe ntchito kuyesa kuuma kwa Rockwell kuyesa kuuma kwa HRC.Ngati kusanjikiza kowuma kwa kutentha kuli kosazama, choyezera kuuma kwa Rockwell chingagwiritsidwe ntchito kuyesa kuuma kwa HRN.
Nthawi yotumiza: Feb-22-2023
