Mafi yawan amfani da shi a samarwa shine wahalar latsawa, kamar wuya na Braskell, Hardness da kuma taurin kai da kuma mobers. An samo ƙimar da ta dace da gaske wakiltar jure wa baƙin ƙarfe ga nakasar filastik wanda aka haifar ta hanyar rusa abubuwan kasashen waje da aka haifar.
Mai zuwa takaice gabatarwa ne ga mahaɗan bangarori daban-daban:
1. Brinell Hardness (HB)
Latsa maɓallin ƙarfe mai taurin kai na wani girman (yawanci 10mm a diamita) a cikin farfajiya na kayan tare da wani kaya tare da wani kaya tare da wani kaya tare da wani kaya tare da wani kaya (gabaɗaya 3000kg) kuma yana kiyaye shi na ɗan lokaci. Bayan an cire nauyin, da rabo daga cikin nauyin yanki shine darajar da taurin kai (HB), a kilogram Arght / mm2 (n / mm2).
2
Lokacin da HB> 450 ko samfurin ya yi ƙanana da yawa, ba za a iya amfani da gwajin Verell da Hardness da Hardness Hardness ba. Yana amfani da mazugi mai lu'u-lu'u tare da kusurwar °0 ° ko kuma ball na karfe tare da farfadowa na 1.59mm da 3.18mm don matsawa a ƙarƙashin wani kaya daga cikin wani kaya, da wuya na kayan daga zurfin shiga ciki. Dangane da wahalar kayan gwaji, ana iya bayyana shi a cikin sikeli uku daban-daban:
HRA: Hakaddara da ta samu ta amfani da nauyin 60kg da keɓaɓɓen gefe, kuma ana amfani dashi don kayan aiki tare da matukar ƙarfi (kamar taurin kai tsaye, da sauransu).
HRB: Shin, yana da wuya da aka samu ta amfani da nauyin 100kg da ƙwallon ƙarfe tare da diamita na 1.58mm. Ana amfani dashi don kayan da ke da ƙarfi (kamar ƙarfe na ƙarfe, ƙware baƙin ƙarfe, da sauransu).
HRC: Shin, yana da wuya da aka samu ta amfani da nauyin 150kg da keɓaɓɓen indester, kuma ana amfani dashi don kayan da ke da ƙarfi (kamar ƙarfe na ƙarfi, da sauransu).
3 Vickers Hardness (HV)
Yi amfani da indster murabba'in lu'u-lu'u tare da nauyin ƙasa da 120kg da kuma kusurwar ƙasa na rami na kayan abu ta hanyar nauyin kayan abu ta hanyar darajar kaya, wanda shine Harshen Vickers HVE (KGF / MM2).
Idan aka kwatanta da gwaje-gwaje na Brinell da Hardness na Gwaje, Gwajin Kwararraki yana da fa'idodi da yawa. Ba shi da matsalolin da aka ƙayyade na nauyin P da na ciki diamita D kamar brinell, da kuma matsalar lalata na ciki; Kuma ba shi da matsalar cewa m darajar dutsen ba za a iya haɗa shi ba. Kuma zai iya gwada kowane abu mai taushi da wuya kamar Roverwell, kuma zai iya gwada wuya na sassan ciki na bakin ciki (ko yadudduka na bakin ciki) mafi kyau fiye da Roverwell surface. Amma ko da a ƙarƙashin irin waɗannan yanayi, ana iya kwatanta shi ne kawai a cikin sikelin Rockwell, kuma ba za'a iya haɗa shi da wasu matakan wuya ba. Bugu da kari, saboda Rockwellwell yana amfani da zurfin ciki kamar yadda ma'aunin auna, kuma zurfin Innentation koyaushe ƙanƙanta ne. Sabili da haka, Dandalin Hardness Dought ba kamar yadda aka tsallake kamar Braske da Vickers ba, kuma ba shakka ba kamar yadda aka tabbata a matsayin daidaito ba.
Akwai wata dangantakar canzawa tsakanin Brinell, Rockwell da Vickkers, kuma akwai tebur dangantaka dangantakar canzawa da za a iya tsammani.
Lokacin Post: Mar-16-2023
