Mugihe cyo kugerageza ubukana bwibyuma bya karubone hamwe nuburemere buke, dukwiye guhitamo igeragezwa rikomeye kugirango tumenye neza ko ibisubizo byikizamini ari ukuri kandi neza. Turashobora gutekereza gukoresha igipimo cya HRB cyikizamini cya Rockwell.
Igipimo cya HRB cyo gupima ubukana bwa Rockwell ikoresha icyuma cyerekana umupira ufite diameter ya 1.588mm hamwe nimbaraga zipima 100KG. Ikigereranyo cyo gupima igipimo cya HRB gishyizwe kuri 20-100HRB, gikwiranye no gupima ubukana bwibikoresho byinshi bya karubone bizenguruka hamwe nuburemere buke.
1.Niba ibyuma bya karubone bizengurutswe kandi bifite ubukana bwinshi bwa HRC40 - HRC65, ugomba guhitamo ikizamini cya Rockwell. Ikigeragezo gikomeye cya Rockwell kiroroshye kandi cyihuse gukora, kandi kirashobora gusoma mu buryo butaziguye agaciro gakomeye, gakwiriye gupima ibikoresho bikomeye.
2.Kububiko bumwebumwe bwa karubone buzengurutswe bwakorewe hamwe na carburizing, nitriding, nibindi, ubukomere bwubuso buri hejuru kandi ubukomere bwibanze ni buke. Mugihe bibaye ngombwa gupima neza ubukana bwubuso, hashobora gutorwa igeragezwa rya Vickers cyangwa ikizamini cya microhardness. Indentation yikizamini cya Vickers ni kare, kandi agaciro gakomeye kabarwa mugupima uburebure bwa diagonal. Ibipimo byukuri ni byinshi kandi birashobora kwerekana neza impinduka zikomeye kubintu bifatika.
3. Usibye igipimo cya HRB cyo gupima ubukana bwa Rockwell, igeragezwa rya Brinell rishobora no gukoreshwa mugupima ubukana buke bwa karubone ibyuma bizenguruka ibikoresho. Mugihe cyo kugerageza ibyuma bya karubone bizengurutse, indenter yayo izasiga ahantu hanini ho kwerekanwa hejuru yibikoresho, bishobora kurushaho kwerekana neza kandi byuzuye kwerekana impuzandengo yikigereranyo cyibintu. Mugihe cyo gukora igeragezwa ryikizamini, ibizamini bya Brinell ntabwo byihuta kandi byoroshye nkibizamini bya Rockwell. Ikizamini cya Brinell ni igipimo cya HBW, kandi indenters zitandukanye zihuye nimbaraga zo kugerageza. Kubyuma bya karubone bizengurutswe hamwe nuburemere buke, nkibiri muri reta yegeranye, ubukana busanzwe buri hafi ya HB100 - HB200, kandi hashobora gutorwa ikizamini cya Brinell.
4.Kububiko bwa karubone ibyuma bizengurutswe na diametero nini nuburyo busanzwe, abapima ubukana butandukanye barashobora gukoreshwa. Ariko, niba diameter yumurongo uzengurutswe ari ntoya, nka munsi ya 10mm, igeragezwa rya Brinell irashobora kugira ingaruka kubipimisho bitewe nubunini bunini. Muri iki gihe, Ikizamini cya Rockwell cyangwa Ikizamini cya Vickers gishobora gutoranywa. Ingano ya indenter ni ntoya kandi irashobora gupima neza ubukana bwintangarugero nto.
5.Kububiko bwa karubone ifite ibyuma bidasanzwe bizengurutse gushyira kuntebe yumurimo wikizamini gisanzwe cyo gupima, gupimwa gukomeye, nka Leeb igerageza, birashobora gutoranywa. Ikoresha igikoresho cyo kohereza umubiri kugirango ugire ingaruka hejuru yikintu gipimwa, kandi ubaze agaciro gakomeye ukurikije umuvuduko umubiri wagaruye. Nibyoroshye gukora kandi birashobora gukora ibipimo byimbuga kumurimo wibikorwa bitandukanye.
Igihe cyo kohereza: Apr-14-2025
