1. Te whakarewanga o te pōro maitai: te maitai iti-chromium, te maitai waenga-chromium, te maitai teitei-chromium me te maitai tino-chromium teitei (Cr12%-28%).
2. Te hanga pōro maitai: te maitai koranu waro iti, te maitai koranu waro reo, te maitai konupora nui me te pōro maitai koranu chromium molybdenum whenua onge:
Ko tēhea momo pōro maitai te mea pai rawa atu? Me tātari tātou i ēnei:
1. Te kounga o te maitai chromium teitei: he nui ake te ihirangi chromium i te 10%, ko te ihirangi waro i roto i te 1.80% -3.20% e kiia ana he maitai chromium teitei, ko ngā whakaritenga o te paerewa ā-motu o te pakeke pōro chromium teitei (HRC) me ≥ 58, AK ≥ 3.0J/cm uara pānga o
2. Taupū kounga maitai iti-chromium: me te 0.5% ~ 2.5%, ko te ihirangi waro i roto i te 1.80%-3.20% e kiia ana he maitai iti-chromium, ko ngā whakaritenga o te paerewa ā-motu mō te pakeke o te maitai iti-chromium (HRC) me ≥ 45, AK ≥ 1.5J/cm uara pānga o te 2. Hei whakarite i te kounga o te poro maitai iti-chromium mā te whakamahana pāmahana teitei, te maimoatanga koroheketanga wiri rānei (hei whakakore i te ahotea maka, pērā i te whāinga) o te mata poro maitai he whero pouri hei tohu kua oti te maimoatanga whakamahana pāmahana teitei te hua, pērā i te tae whakarewa o te mata poro maitai e tohu ana i te hua kāore i te whakamahana.
3. Taupū kounga pōro maitai hanga: me te 0.1% ~ 0.5% (pōro maitai hanga kāore he chromium), ko te ihirangi waro kei raro i te 1% me te pōro maitai me te hanga pāmahana teitei, ko te pakeke o te mata pōro maitai hanga (HRC) ≥ 56 (ahakoa ka taea te whakatutuki i te paparanga tinei neke atu i te 15 mm pea), ko te kaha o te pōro maitai hanga nā te mea he 30 nekehanga noa iho te pakeke matua o te rauemi pōro maitai hanga. I raro i ngā āhuatanga noa, he teitei te tere pakaru o te pōro maitai hanga ina rongoatia ki te wai tinei.
4. Whakataurite i te ātete kakahu: maitai chromium tino teitei > maitai chromium teitei > pōro maitai chromium waenga > maitai chromium iti > pōro maitai hanga.
Ngā huānga o te pōro maitai ātete-kakahu:
Ko te nui o te chromium he 1% – 3%, ā, ko te pakeketanga o te HRC he ≥ 45. Ko tēnei paerewa o te pōro maitai ātete-kakahu e kiia ana ko te pōro whakarewa koranu chromium-iti. Ka whakamahia e ngā pōro chromium-iti te aratau oumu hiko auau waenga, te pokepokea whakarewa, te aratau whakarewa onepu rānei. He pai tōna mahi mō ētahi maina whakarewa, para me ētahi atu ahumahi, he iti te tika o te huri me te iti o te paunga.
Ko te nui o te chromium i roto i te pōro maitai ātete-mau he 4% ki te 6%, ā, ko te pakeke HRC ≥ 47. E kiia ana tēnei paerewa ko ngā pōro koranu maha-huānga, he teitei ake i te maitai chromium iti e pā ana ki te kaha me te ātete ki te mau. Ko te nui o te chromium he 7% – 10%, ā, ko te pakeke HRC ≥ 48 mō ngā pōro maka koranu chromium, ko tōna mahi me ētahi atu āhuatanga he teitei ake i te pōro maitai koranu maha teitei.
Ko te nui o te chromium o te pōro maitai ātete-kakahu he ≥ 10% – 14%, ā, ko te pakeketanga o te HRC he ≥ 58. Ko ngā pōro whakarewa koranu chromium teitei he momo pōro maitai ātete-kakahu, he tere te whakamahi, ā, he pai te utu i te mākete o nāianei. He whānui te whānuitanga o ana tono, ā, e whakamahia ana i roto i te whakarewa, te sima, te mana wera, te whakakorenga whanariki hau korere, ngā rauemi aukume, te matū, te papu wai waro; nō reira, te pōro, te paura tino pai, te para, te pungarehu rere, te konupūmā kāponāte me te onepū-kiripaka. Ko tana mahi he mea nui i roto i te umanga sima, ka taea te whakanui ake i te whakaputanga me te whakaiti i te whakapaunga pūngao.
Wā tuku: Whiringa-ā-rangi 29-2022
