Mmekọrịta dị n'etiti nkeji siri ike nke Brinell, Rockwell na Vickers (sistemụ siri ike)

Ihe a na-ejikarị eme ihe n'imepụta ihe bụ ike nke usoro press-in, dịka ike Brinell, ike Rockwell, ike Vickers na ike micro. Uru ike enwetara na-anọchite anya nguzogide nke elu ígwè na mgbanwe plastik nke ihe ndị si mba ọzọ kpatara.

Nke a bụ obere okwu mmalite maka ụdị siri ike dị iche iche:

1. Ike siri ike nke Brinell (HB)

Pịa bọọlụ ígwè siri ike nke nwere nha ụfọdụ (nke na-abụkarị 10mm na dayameta) n'elu ihe ahụ ma nwee ibu ụfọdụ (nke na-abụkarị 3000kg) ma debe ya ruo oge ụfọdụ. Mgbe ewepụchara ibu ahụ, oke ibu ahụ na mpaghara ntinye ahụ bụ uru siri ike nke Brinell (HB), na kilogram ike/mm2 (N/mm2).

2. Ike siri ike nke Rockwell (HR)

Ọ bụrụ na HB>450 ma ọ bụ ihe nlele ahụ pere mpe, a gaghị eji ule siri ike Brinell mee ihe, a ga-ejikwa nha siri ike Rockwell kama. Ọ na-eji cone diamond nwere akụkụ vertex nke 120° ma ọ bụ bọọlụ ígwè nwere dayameta nke 1.59mm na 3.18mm iji pịa n'elu ihe ahụ a ga-anwale n'okpuru ibu ụfọdụ, a na-enwetakwa ike nke ihe ahụ site na omimi nke indentation. Dịka ike nke ihe nnwale si dị, enwere ike ịkọwapụta ya na nha atọ dị iche iche:

HRA: Ọ bụ ike e nwetara site na iji ibu 60kg na ihe mkpuchi cone diamond, a na-ejikwa ya maka ihe ndị nwere oke ike (dịka carbide simenti, wdg).

HRB: Ọ bụ ike e nwetara site na iji ibu 100kg na bọọlụ ígwè siri ike nke nwere dayameta nke 1.58mm. A na-eji ya eme ihe maka ihe ndị nwere obere ike (dịka ígwè annealed, ígwè a kpụrụ akpụ, wdg).

HRC: Ọ bụ ike e nwetara site na iji ibu 150kg na ihe mkpuchi cone diamond, a na-ejikwa ya maka ihe ndị nwere nnukwu ike (dịka ígwè siri ike, wdg).

Ike Vickers atọ (HV)

Jiri ihe nrịbama nke nwere kọnị diamond nke nwere ibu na-erughị 120kg na akụkụ vertex nke 136° iji pịa n'elu ihe ahụ, wee kewaa mpaghara elu nke oghere ntinye ihe ahụ site na uru ibu, nke bụ uru ike Vickers HV (kgf/mm2).

Ma e jiri ya tụnyere ule siri ike nke Brinell na Rockwell, ule siri ike nke Vickers nwere ọtụtụ uru. O nweghị ihe mgbochi nke ọnọdụ akọwapụtara nke ibu P na dayameta indenter D dị ka Brinell, na nsogbu nke mgbanwe nke indenter; ọ nweghịkwa nsogbu na uru siri ike nke Rockwell enweghị ike ijikọ. Ọ nwekwara ike ịnwale ihe ọ bụla dị nro na nke siri ike dị ka Rockwell, ọ nwekwara ike ịnwale ike nke akụkụ dị gịrịgịrị (ma ọ bụ oyi akwa dị gịrịgịrị) karịa Rockwell, nke enwere ike ime naanị site na ike elu Rockwell. Mana ọbụlagodi n'ọnọdụ ndị dị otú ahụ, enwere ike iji ya tụnyere naanị n'ime nha Rockwell, enweghịkwa ike ijikọ ya na ọkwa siri ike ndị ọzọ. Na mgbakwunye, n'ihi na Rockwell na-eji omimi indtation dị ka ndeksi nha, omimi indtation na-adịkarị obere karịa obosara indenter, yabụ njehie ya dịkwa ukwuu. Ya mere, data siri ike Rockwell adịghị ike dị ka Brinell na Vickers, n'ezie ọ dịghịkwa ike dị ka nkenke Vickers.

E nwere mmekọrịta mgbanwe n'etiti Brinell, Rockwell na Vickers, e nwekwara tebụl mmekọrịta mgbanwe nke a pụrụ ịjụ ajụjụ.