Hariho ivyiciro bitatu vy’ingingo ngenderwako z’ugupima uburemere bw’ibinogo, ni ukuvuga Vickers, Rockwell n’agaciro k’uburemere bw’ibintu. Dushingiye ku buryo bwo gusukura ubushuhe, uburyo bwo gupima uburemere bw’uguzimya ubushuhe n’ugusukura ubushuhe bwo ku ruhande n’ubushuhe bwo gusukura ubushuhe bw’imiti na bwo nyene buratandukanye.
Ivyiyumviro nyamukuru vy’ubuhinga bw’ibikoresho vyo gusukura ubushuhe bw’imiti ni uburebure bw’ibice bikomeye n’ubukomezi bwo ku ruhande. Uburebure bw’igice gikomeye bukwiye kugeragezwa n’igikoresho co gupima uburemere bwa Vickers. Gerageza urugendo ruva ku ruhande rw’igikorwa gushika aho ubukomezi buja kuri 50HRC. Ivyo ni vyo bituma umuntu agira uburebure bwiza.
Ubushuhe bw’imiti ni ukwinjira ku ruhande rw’ico gikoresho gifise atome z’ikintu kimwe canke vyinshi vy’imiti, gutyo bikaba bihindura imiterere y’imiti, imiterere n’imiterere y’igihimba c’umubiri. Inyuma yo kuzimya no hasi -Ubushuhe bwo gutera imbere, uruhande rw’igikorwa rufise ubukomezi bwinshi, ubushobozi bwo kwambara n’inkomezi z’urushe, mu gihe umugozi w’ico gikoresho ufise ubukomezi bwinshi.
Igerageza ry’ugukomera kw’imbere ry’ico gikoresho c’ubushuhe bw’ifu y’ifuru ni nk’ikigeragezo c’ugukomera kw’igitereko c’ubushuhe buzimya ku ruhande. Ivyo vyose bishobora kugeragezwa n’umukinyi w’inyuma w’umugwi wa Vickers, ku ruhande rw’imbere canke igikoresho co gupima ubukomezi bwa Rockwell. Ariko rero, uburemere bw’uburemere bw’ivyuma vy’ivyuma ni buke, muri rusangi ntiburenga 0,7mm, rero igikoresho co gupima ubukomezi bwa Rockwell ntigishobora gukoreshwa.
Iyo ibisabwa bikomeye vyo mu karere ari vyinshi, uburyo bwo gukoresha ubushuhe bwo mu karere bushobora gukorwa n’ugushushanya n’ubundi buryo. Mwene ivyo bice akenshi bikeneye gushira ikimenyetso ku kibanza n’agaciro k’uburemere bw’aho hantu k’ubushuhe bwo mu karere ku bishushanyo. Igerageza ry’uburemere bw’ibice rikwiye gukorwa mu karere kashinzwe. Igikoresho co gupima ubukomezi gishobora gukoresha igikoresho co gupima ubukomezi bwa Rockwell kugira ngo kigerageze agaciro k’ubukomezi bwa HRC. Iyo igice c’ugukomera kw’ubushuhe ari gito, igikoresho co gupima uburemere bw’ibintu vyo hejuru Rockwell gishobora gukoreshwa mu kugerageza agaciro k’uburemere bwa HRN.
Igipande c’ubushuhe kizimye n’ubushuhe bushaje, akenshi gikorwa n’ugushushanya canke gushuha kw’imbeya. Ivyiyumviro nyamukuru vy’ubuhinga ni ubukomezi bwo ku ruhande, ubukomezi bwo mu karere n’uburebure bw’igice c’ugukomera. Ico kigeragezo c’ubukomezi gishobora gukorwa n’umugerageza w’ugukomera kw’aba Vickers, Rockwell canke ku ruhande rwa Rockwell. Ihitamwo ry’inguvu z’igerageza (urugero) rifitaniye isano n’uburebure bwiza bw’igice c’ugukomera be n’uburemere bw’ibarabara ry’igikorwa. Hari ubwoko butatu bw’abagerageza ubukomezi bari muri iki gihe.
Igikoresho co kugerageza ubushobozi bwa Vickers ni uburyo buhambaye bwo kugerageza uburemere bw’ubushuhe bw’ubushuhe bw’ubushuhe. Ishobora gukoresha inguvu z’igerageza za 0,5 gushika kuri 100 kugira ngo igerageze igice gikomeye c’imbere nk’uko 0,05 mm. Irafise ukuri kuruta izindi kandi irashobora gutandukanya itandukaniro ritoyi ry’ugukomera kw’ibarabara ry’igikorwa. Ikindi, uburebure bw’uruzitiro rwakomeje butegerezwa kandi kumenyekana n’umugerageza w’ugukomera kw’aba Vickers. Ku bw’ivyo, birakenewe ko habaho igikoresho co gupima uburemere bwa Vickers ku bice bikora ubuvuzi bw’ubushuhe bwo ku ruhande canke bikoresha umubare munini w’ibikoresho vy’ubushuhe bwo ku ruhande{8}} ibikoresho vyagezweho.
Igikoresho co gupima uburemere bw’ibintu vyo ku ruhande na co nyene kirabereye cane kugira ngo umuntu agerageze ubushobozi bw’ibikoresho vyazimye ku ruhande. Igikoresho co gupima uburemere bw’ibintu ku ruhande rwa Rockwell gifise umunzane batatu umuntu yohitamwo. Ishobora kugerageza ibikoresho bitandukanye vy’imbere bifise uburebure bw’uburebure bw’uburebure burenga 0,1 mm. Naho ukuri kw’igikoresho co gupima uburemere bw’ibintu vyo hejuru Rockwell kitari kinini nk’ivyo mu gipimo c’aba Vickers gikomeye, gishobora gushitsa ibisabwa nk’uburyo bwo gucunga neza uburyo no gusuzuma neza ibiterwa vyo gusukura ubushuhe. Ikindi kandi, irafise ibiranga ibikorwa vyoroshe, gukoresha vyoroshe, igiciro gito, gupima vyihuta, no gusoma ata guca ku ruhande agaciro k’uburemere. Igikoresho co kugerageza ubukomezi bwo ku ruhande gishobora gukoreshwa mu buryo bwihuta kandi butagira - bwo kugerageza ibice vy'ubushuhe bwo ku ruhande{7}} ibikoresho vyavuguruwe kimwe kimwe kimwe. Ivyo birahambaye cane ku mahinguriro y’ivyuma n’amamashini.
Iyo ubushuhe bwo ku ruhande rw’ubushuhe bwo ku ruhande rw’ico gipfukisho gikomeye, igikoresho co gupima uburemere bw’ibintu bikomeye Rockwell gishobora no gukoreshwa. Iyo uburebure bw’igice gikomeye ari 0.4-0.8mm, urugero rwa HRA rushobora gukoreshwa, kandi iyo uburebure bw’igice c’uburebure burenze 0,8mm, urugero rwa HRC rurashobora gukoreshwa.
Ivyiyumviro bitatu vy’ubukomezi bwa Vickers, Rockwell na Rockwell ku ruhande birashobora guhindurwa bitagoranye maze bikahindurwa agaciro k’uburemere busabwa n’ingingo mfatirwako, ibishushanyo canke abakoresha. Ivyo bimeza vy’uguhindura bihuye n’ivyo bitangwa mu rugero mpuzamakungu ISO, ASTM isanzwe n’icitegererezo c’Abashinwa GB/T.
