Rockwell Hardness Scale HRA HRB HRC HRD

Rockwell hardness scale e ile ea qaptjoa ke Stanley Rockwell ka 1919 ho lekola kapele ho thatafala ha thepa ea tšepe.

(1) HRA

① Mokhoa oa teko le molao-motheo: ·HRA teko ea boima ba 'mele e sebelisa indenter ea khoune ea daemane ho hatella holim'a thepa ka tlas'a moroalo oa 60 kg, le ho lekanya boleng ba boima ba thepa ka ho lekanya botebo ba ho kenella. ② Mefuta ea thepa e sebetsang: ·Haholo-holo e loketse lisebelisoa tse thata haholo tse kang carbide e samenteng, lirafshoa le litšepe tse thata, hammoho le tekanyo ea ho thatafala ha lisebelisoa tse tšesaane tsa poleiti le lirafshoa. ③ Maemo a tloaelehileng a ts'ebeliso: ·Ho etsa le ho hlahloba lisebelisoa le hlobo. ·Teko ea boima ba lisebelisoa tsa ho itšeha. · Taolo ea boleng ba ho thatafala ha ho roala le lisebelisoa tse tšesaane tsa poleiti. ④ Likarolo le melemo: ·Tekanyo e potlakileng: Teko ea boima ba HRA e ka fumana liphetho ka nako e khuts'oane mme e loketse ho bonoa ka potlako moleng oa tlhahiso. ·Ho nepahala ho phahameng: Ka lebaka la ts'ebeliso ea li-indenter tsa daemane, liphetho tsa liteko li na le ho pheta-pheta ho phahameng le ho nepahala. ·Versatility: E khona ho lekola lisebelisoa tsa libopeho le boholo bo fapaneng, ho kenyeletsoa lipoleiti tse tšesaane le likobo. ⑤ Lintlha kapa mefokolo: · Tokiso ea mohlala: Sebaka sa sampole se hloka ho ba se bataletseng le ho hloeka ho netefatsa bonnete ba liphetho tsa tekanyo. Lithibelo tsa lintho tse bonahalang: Ha li loketse lisebelisoa tse bonolo haholo hobane indenter e ka 'na ea hatella sampole ho feta tekano, e leng se hlahisang liphetho tse sa nepahalang tsa litekanyo. Tlhokomelo ea lisebelisoa: Thepa ea liteko e hloka ho lekanyetsoa le ho hlokomeloa khafetsa ho netefatsa ho nepahala le botsitso.

(2)HRB

① Mokhoa oa teko le molao-motheo: · Teko ea boima ba HRB e sebelisa inndenter ea tšepe ea 1/16-inch ho hatella holim'a thepa ka tlas'a mojaro oa 100 kg, 'me boleng ba boima ba thepa bo khethoa ka ho lekanya botebo ba ho kenella. ② Mefuta ea lisebelisoa tse sebetsang: · E sebetsa ho thepa e thata e mahareng, joalo ka lialloi tsa koporo, lialloi tsa aluminium le tšepe e bonolo, hammoho le litšepe tse bonolo le lisebelisoa tse seng tsa tšepe. ③ Maemo a tloaelehileng a ts'ebeliso: ·Taolo ea boleng ba maqephe a tšepe le liphaephe. ·Teko ea boima ba litšepe tse se nang ferrous le alloys. ·Teko ea thepa indastering ea kaho le ea likoloi. ④ Likarolo le melemo: ·Mekhahlelo e mengata ea ts'ebeliso: E sebetsa ho lisebelisoa tse fapaneng tsa tšepe tse thata tse mahareng, haholo litšepe tse bobebe le tse se nang tšepe. ·Teko e bonolo: Ts'ebetso ea tlhahlobo e batla e le bonolo ebile e potlakile, e loketse tlhahlobo e potlakileng moleng oa tlhahiso. · Liphetho tse tsitsitseng: Ka lebaka la tšebeliso ea tšepe ea tšepe ea bolo, liphello tsa liteko li na le botsitso bo botle le ho pheta-pheta. ⑤ Lintlha kapa mefokolo: · Tokiso ea mohlala: Sebaka sa sampole se hloka ho ba boreleli le se bataletseng ho netefatsa ho nepahala ha liphetho tsa tekanyo. ·Meeli ea mefuta e thata: Ha e sebetse ho thepa e thata haholo kapa e bonolo haholo, hobane indenter e ka 'na ea se ke ea khona ho lekanya ka nepo ho thatafala ha lisebelisoa tsena. · Tlhokomelo ea lisebelisoa: Thepa ea liteko e hloka ho lekanyetsoa le ho hlokomeloa khafetsa ho netefatsa bonnete le ts'epahalo ea tekanyo.

(3)HRC

① Mokhoa oa teko le molao-motheo: · Teko ea boima ba HRC e sebelisa sekontiri sa daemane ho hatella holim'a thepa ka tlas'a mojaro oa 150 kg, 'me boleng ba boima ba thepa bo khethoa ka ho lekanya botebo ba ho kenella. ② Mefuta ea lisebelisoa tse sebetsang: · Haholo-holo e loketse lisebelisoa tse thata, tse kang tšepe e thata, carbide e entsoeng ka samente, tšepe ea lisebelisoa le lisebelisoa tse ling tsa tšepe tse thata haholo. ③ Maemo a tloaelehileng a ts'ebeliso: · Tlhahiso le taolo ea boleng ba lisebelisoa tsa ho itšeha le hlobo. · Teko ea boima ba tšepe e thata. · Tlhahlobo ea likere, li-bearings le likarolo tse ling tsa mochini tse thata haholo. ④ Likarolo le melemo: · Ho nepahala ho phahameng: Teko ea boima ba HRC e na le ho nepahala ho phahameng le ho pheta-pheta, 'me e loketse tlhahlobo ea boima bo nang le litlhoko tse thata. · Tekanyo e potlakileng: Liphetho tsa liteko li ka fumanoa ka nako e khutšoanyane, tse loketseng ho hlahlojoa ka potlako moleng oa tlhahiso. · Tšebeliso e pharaletseng: E ​​sebetsa ho lekoa ha mefuta e sa tšoaneng ea lisebelisoa tse thata haholo, haholo-holo tšepe e nang le mocheso le tšepe ea lisebelisoa. ⑤ Lintlha kapa mefokolo: · Tokiso ea mohlala: Sebaka sa mohlala se hloka ho ba se bataletseng le ho hloeka ho netefatsa ho nepahala ha liphetho tsa tekanyo. Meeli ea lintho tse bonahalang: Ha e tšoanelehe bakeng sa lisebelisoa tse bonolo haholo, kaha khoune ea daemane e ka tobetsa ho feta sampole, ho baka liphetho tse sa nepahalang tsa tekanyo. Tlhokomelo ea lisebelisoa: Thepa ea liteko e hloka ho lekoa le ho lokisoa khafetsa ho netefatsa ho nepahala le botsitso ba tekanyo.

(4) HRD

① Mokhoa oa teko le molao-motheo: · Teko ea boima ba HRD e sebelisa setlolo sa daemane ho hatella holim'a thepa ka tlas'a boima ba lik'hilograma tse 100, 'me boleng ba boima ba thepa bo khethoa ka ho lekanya botebo ba indentation. ② Mefuta ea lisebelisoa tse sebetsang: ·Haholo-holo e loketse lisebelisoa tse thata haholo empa li le ka tlase ho mefuta ea HRC, joalo ka litšepe tse ling le lialloi tse thata. ③ Maemo a tloaelehileng a ts'ebeliso: ·Taolo ea boleng le tlhahlobo ea boima ba tšepe. ·Teko ea boima ba li-alloys tse thata tse mahareng ho isa ho tse phahameng. · Teko ea lisebelisoa le hlobo, haholo-holo bakeng sa lisebelisoa tse nang le mefuta ea boima ba mahareng ho isa holimo. ④ Likarolo le melemo: ·Moroalo o itekanetseng: Sekala sa HRD se sebelisa boima bo tlase (100 kg) 'me se loketse lisebelisoa tse nang le mefuta e sa tšoaneng ea boima bo bohareng ho isa holimo. ·Ho pheta-pheta ho phahameng: Indenter ea khoune ea daemane e fana ka liphetho tse tsitsitseng le tse phetoang haholo. ·Sesebelisoa se feto-fetohang: E ​​sebetsa litekong tsa ho thatafala ha lisebelisoa tse fapaneng, haholo tse lipakeng tsa HRA le HRC. ⑤ Lintlha kapa mefokolo: · Tokiso ea mohlala: Sebaka sa sampole se hloka ho ba se bataletseng le ho hloeka ho netefatsa bonnete ba liphetho tsa tekanyo. Meeli ea lintho tse bonahalang: Bakeng sa thepa e thata haholo kapa e bonolo, HRD e kanna ea se be khetho e nepahetseng ka ho fetesisa. Tlhokomelo ea lisebelisoa: Thepa ea liteko e hloka ho lokisoa khafetsa le tlhokomelo ho netefatsa ho nepahala le ho ts'epahala ha litekanyo.