(1) Ko te rerekētanga matua i waenga i ngā rauemi maitai e whakamahia ana mō ngā wāhanga mekameka i te kāinga me tāwāhi ko ngā pereti mekameka o roto, o waho hoki. Ko te mahi a te pereti mekameka me whai kaha kume teitei me te pakari. I Haina, ko te 40Mn me te 45Mn te nuinga o te wā e whakamahia ana mō te hanga, ā, he onge te whakamahi i te maitai 35. He whānui ake te hanganga matū o ngā pereti maitai 40Mn me te 45Mn i ērā o ngā maitai S35C me SAEl035 o tāwāhi, ā, he 1.5% ki te 2.5% te matotoru o te tango waro i runga i te mata. Nō reira, he maha ngā wā ka pakarukaru te pereti mekameka i muri i te tinei me te whakatikatika nui.
I te wā e whakamātautauhia ana te pakeketanga, he iti te pakeketanga o te mata o te pereti mekameka i muri i te tineitanga (iti iho i te 40HRC). Mēnā ka memeha haere tētahi matotoru o te paparanga mata, ka eke te pakeketanga ki te neke atu i te 50HRC, ka pā kino tēnei ki te kawenga kume iti rawa o te mekameka.
(2) Ko te tikanga, ka whakamahia e ngā kaihanga o tāwāhi te S35C me te SAEl035, ā, ka whakamahia hoki e rātou ngā oumu whakapūmau whitiki mata tonu matatau ake. I te wā e whakamahanatia ana, ka whakamahia he hau tiaki mō te whakamahanatanga anō. Hei tāpiri, ka whakatinanahia he mana whakahaere tukanga tino pakari i te papaanga, nō reira he onge te puta o ngā pereti mekameka. I muri i te tinei me te whakamahana, ka puta he pakarukaru, he iti rānei te pakeke o te mata.
E whakaatu ana te tirohanga whakarewa he nui te hanganga martensite rite ki te ngira angiangi (tata ki te 15-30um) i runga i te mata o te pereti mekameka i muri i te tinei, ko te uho he hanganga martensite rite ki te rīpene. I raro i te āhua o te matotoru o te pereti mekameka kotahi, ko te kawenga kume iti rawa i muri i te whakamahana he nui ake i tērā o ngā hua o roto. I ngā whenua ke, ko ngā pereti matotoru 1.5mm te nuinga o te wā e whakamahia ana, ā, ko te kaha kume e hiahiatia ana he >18 kN, ko ngā mekameka o roto ia e whakamahi ana i ngā pereti matotoru 1.6-1.7mm, ā, ko te kaha kume e hiahiatia ana he >17.8 kN.
(3) Nā te whakapai tonu i ngā whakaritenga mō ngā wāhanga mekameka motopaika, kei te whakapai tonu ngā kaihanga o roto me tāwāhi i te maitai e whakamahia ana mō ngā pine, ngā ringaringa me ngā roera. Ko te iti rawa o te kawenga kume, inā koa ko te ātete kakahu o te mekameka e pā ana ki te maitai. Whai muri i te whiriwhiringa a ngā kaihanga o roto me tāwāhi i te maitai 20CrMnTiH hei rauemi pine hei utu mō te 20CrMnMo, ka piki ake te kawenga kume mekameka mā te 13% ki te 18%, ā, ka whakamahia e ngā kaihanga o tāwāhi te maitai SAE8620 hei rauemi pine me te ringaringa. E pā ana hoki tēnei ki tēnei. Kua whakaatuhia e te mahi mā te whakapai ake i te āputa i waenganui i te pine me te ringaringa, te whakapai ake i te tukanga maimoatanga wera me te whakahinuhinu, ka taea te whakapai ake i te ātete kakahu me te kawenga kume o te mekameka.
(4) I roto i ngā wāhanga mekameka motopaika, ka honoa ngātahitia te pereti hononga o roto me te ringaringa, te pereti hononga o waho me te pine ki te taunga pokanoa, ko te pine me te ringaringa he taunga ātea. He nui te pānga o te taunga i waenga i ngā wāhanga mekameka ki te ātete kakahu me te kawenga kume iti o te mekameka. E ai ki ngā wā whakamahinga rerekē me ngā kawenga pakaru o te mekameka, ka wehea kia toru ngā taumata: A, B me C. Ka whakamahia te Akomanga A mō te tuku taumaha, tere teitei me te mea nui; Ka whakamahia te Akomanga B mō te tuku whānui; Ka whakamahia te Akomanga C mō te whakawhiti taputapu noa. Nō reira, he tino kaha ake ngā whakaritenga taurite i waenga i ngā wāhanga mekameka Akomanga A.
Wā tuku: Hepetema-08-2023