Me pēhea te aromatawai i te kounga o te maimoatanga wera o te mata wiri

1. Te Pakari o Rockwell (HRC) — He mea nui ake te ōritetanga i te pānui kotahi

Ko te whakamātautau pakeke o Rockwell C te huarahi tino tika, tino whānui hoki e wātea ana hei manatoko i ngā hua o te maimoatanga wera — tata ki ngā kaihanga mata keri katoa me ngā kaitirotiro tuatoru kei a rātou tēnei āheinga. Engari kāore he kōrero nui mā te pānui kotahi. Ko te mea nui ko te noho tonu o te pakeke i roto i tētahi awhe ōrite, whaitake puta noa i ngā wahi maha mai i te puranga kotahi.

Mō ngā wiri hurihuri HSS, ko te ariā matua ko te whakapakeketanga o te mata tapahi hei ātete ki te kakahu, ko te kakau ia ka waiho kia iti ake te pakeketanga kia taea ai te mimiti i te ru me te kore e pakarukaru. Ko taua pikinga pakeke tonu he tohu nui kua tika te mahi whakamahana - koinei hoki te tikanga whakamana i muri i te take "ko te whakapakeketanga ka pakarukaru" i kōrerohia e mātou i roto i te tuhinga o mua. Ko ngā awhe tohutoro ahumahi e whakahuatia whānuitia ana mō te mata tapahi o ngā wiri hurihuri HSS kounga kei te 63–66 HRC, ahakoa he rerekē te whika tika i runga i te diameter me te kounga (M2, M35, me ētahi atu).

Ngā mea hei tono atu ki tētahi kaiwhakarato:he pūrongo whakamātautau mārō e tautuhi ana i te wāhi whakamātautau (te mata tapahi tonu) kaua ki tētahi tau kotahi kāore he tapanga.

2. Te Tauira Puranga — Ehara i te Tauira Tohutoro Anake

Ahakoa kotahi te mata keri e angitu ana i te whakamātautau pakeke, ehara i te mea he rite tonu te puranga katoa. Mā te ōritetanga o te pāmahana i roto i te oumu, te matotoru o te uta, me ētahi atu taurangi tukanga ka rerekē te puranga kotahi. He pai ake te tirotiro i ētahi wahi i te matapōkere mai i te puranga kotahi hei whakamātautau, kaua ko te whakamātautau noa i te tauira kua whakaritea e te kaiwhakarato. He mea nui tēnei ina koa i roto i te hoko rauemi whakawhiti-rohe, i te nuinga o te wā he iti noa ngā tauira ka whiwhihia e ngā kaihoko - ā, kāore te tauira e angitu ana e kī taurangi ana ka ōrite te toenga o te puranga ki a ia.

3. Tirotiro Tirohanga — Te Tohu Tika mō te Hurihuri i te Tahu

Ki te kore e tino whakahaerehia ngā tawhā huri, ka taea e te tukanga te whakamahana anō, te whakapakeke anō rānei i te mata o te mata keri, ā, ka puta noa tēnei hei tae rerekē e kitea ana — he tae kikorangi, he tae pōuri rānei kāore e ōrite ki te āhua o te mata e karapoti ana. Koia te take he mea tika kia tirohia ā-kanohi i muri i te huri me mua i te tākai: i taua wā, ka taea te kite tika i tētahi tae rerekē, i tētahi hapa mata rānei, kaua e puta ake i muri i te tīmatanga o te kiritaki ki te whakamahi i te taputapu.

Ko ngā tikanga tirotiro matatau ake — pērā i te tirotiro matūriki aukume mō ngā kapiti tinei, te whakamātautau nital etch, te whakamātautau au hurihuri rānei mō te wera huri — koia ngā momo tirotiro ka tukuna e te umanga ki tētahi taiwhanga tuatoru ina whakapaehia he raruraru i roto i tētahi puranga. He taputapu whakaū ēnei mō te rapurongoā, ehara i te mea e whakamahia ana ki ia puranga hei mahi noa. He mea tika kia mōhiotia ēnei ina aromatawaihia he kaiwhakarato hou, ina rangahauhia rānei he take puranga, kaua ki tētahi mea e tumanakohia ana hei taahiraa paerewa mō ia ota.

4. Te Mana Whakahaere Tukanga — Ehara i te Hua Anake

Ko te tino taurangi mō te kounga o te maimoatanga wera e ahu mai ana i te whakahaere tukanga, ehara i te wehewehe i ngā wāhanga pai i muri i te mahi. Whai muri i te tinei, ka mau tonu te nui o te austenite kāore i hurihia e te HSS, ka pā tonu ki te pumau me te pakari o te maitai mena ka kore e rongoatia. Ko te tikanga me rua ki te toru ngā huringa whakamahana: ka hurihia e ia huringa te nui ake o te austenite e puritia ana hei martensite, ā, ka whakamama i te pakarukaru ka arahi pea ki te pakaru. E whakaatu ana hoki ngā raraunga ahumahi ka taea tonu e te huringa whakamahana kotahi te waiho i te 10% o te austenite e puritia ana, ā, ko te tikanga me rua ngā huringa whakamahana kia iti iho i te 5%.

Arā, he pātai tika, he pātai whai hua hoki te maha o ngā huringa whakamahana i whakamahia. Tērā pea ka whakaatu te mata wiri kua whakamahanatia kotahi noa te wā i te pakeketanga e whakaaetia ana, ā, kāore tonu i te pumau te hanganga — koinei tētahi o ngā tino take o te aratau rahunga "he pai te āhua o te pakeke engari he pakarukaru tonu" i kōrerotia e tātou i te tuhinga o mua.