Yadda ake zaɓar mai gwajin tauri mai dacewa don sandunan zagaye na ƙarfe na carbon

Lokacin gwada taurin sandunan zagaye na ƙarfen carbon tare da ƙarancin tauri, ya kamata mu zaɓi na'urar gwada tauri mai kyau don tabbatar da cewa sakamakon gwajin daidai ne kuma yana da tasiri. Za mu iya la'akari da amfani da sikelin HRB na na'urar gwajin tauri ta Rockwell.

Sikelin HRB na na'urar gwajin taurin Rockwell yana amfani da inder na ƙwallon ƙarfe mai diamita na 1.588mm da ƙarfin gwajin da ya dace na 100KG. An saita kewayon aunawa na sikelin HRB a 20-100HRB, wanda ya dace da gwajin taurin yawancin kayan ƙarfe masu zagaye tare da ƙarancin taurin.

1. Idan sandar zagaye ta ƙarfen carbon ta mutu kuma tana da tauri mai yawa na kimanin HRC40 - HRC65, ya kamata ku zaɓi na'urar gwada tauri ta Rockwell. Na'urar gwajin tauri ta Rockwell tana da sauƙin aiki da sauri, kuma tana iya karanta ƙimar tauri kai tsaye, wanda ya dace da auna kayan tauri masu ƙarfi.

2. Ga wasu sandunan zagaye na ƙarfe na carbon waɗanda aka yi musu maganin carburizing, nitriding, da sauransu, taurin saman yana da yawa kuma taurin zuciyar yana da ƙasa. Idan ya zama dole a auna taurin saman daidai, ana iya zaɓar mai gwajin taurin Vickers ko mai gwajin microhardness. Shigar gwajin taurin Vickers murabba'i ne, kuma ana ƙididdige ƙimar taurin ta hanyar auna tsawon diagonal. Daidaiton ma'auni yana da girma kuma yana iya nuna canje-canjen taurin daidai akan saman kayan.

3. Baya ga ma'aunin HRB na na'urar gwajin taurin Rockwell, ana iya amfani da na'urar gwajin taurin Brinell don gwada kayan ƙarfe masu zagaye na ƙarfe mai ƙarancin tauri. Lokacin gwada sandunan zagaye na ƙarfe mai carbon, na'urar shigar da ita za ta bar babban yanki na ƙofa a saman kayan, wanda zai iya nuna matsakaicin taurin kayan a fayyace kuma a fayyace. A lokacin aikin na'urar gwajin taurin, na'urar gwajin taurin Brinell ba ta da sauri da sauƙi kamar na'urar gwajin taurin Rockwell. Na'urar gwajin taurin Brinell ita ce ma'aunin HBW, kuma ma'aunin ƙofa daban-daban suna daidaita ƙarfin gwaji. Ga sandunan zagaye na ƙarfe mai ƙarancin tauri gabaɗaya, kamar waɗanda ke cikin yanayin annealed, taurin yawanci yana kusa da HB100 - HB200, kuma ana iya zaɓar na'urar gwajin taurin Brinell.

4. Ga sandunan zagaye na ƙarfe na carbon mai girman diamita da siffar da ta dace, ana amfani da na'urori daban-daban na gwaji masu tauri. Duk da haka, idan diamita na sandar zagaye ƙarami ne, kamar ƙasa da 10mm, na'urar gwajin tauri ta Brinell na iya shafar daidaiton ma'auni saboda babban shigarwar. A wannan lokacin, ana iya zaɓar na'urar gwajin tauri ta Rockwell ko na'urar gwajin tauri ta Vickers. Girman shigarsu ƙarami ne kuma zai iya auna tauri na ƙananan samfura daidai.

5. Ga sandunan zagaye na ƙarfen carbon marasa tsari waɗanda ke da wahalar sanyawa a kan teburin aikin na'urar gwajin tauri ta al'ada don aunawa, ana iya zaɓar na'urar gwajin tauri mai ɗaukuwa, kamar na'urar gwajin tauri ta Leeb. Yana amfani da na'urar tasiri don aika jikin tasiri zuwa saman abin da ake aunawa, kuma yana ƙididdige ƙimar tauri bisa ga saurin da jikin tasirin yake dawowa. Yana da sauƙin aiki kuma yana iya yin ma'aunin a wurin akan kayan aiki masu siffofi da girma dabam-dabam.