Ka whakaputa a Saky Steel i ngā rau me ngā pereti maitai kore waikura martensitic whakapakeke 440 raupapa 440A, 440B, 440C
AISI 440A, UNS S44002, JIS SUS440A, W.-nr. 1.4109 (DIN X70CrMo15) pepa maitai kore waikura, pereti, papatahi
AISI 440B, UNS S44003, JIS SUS440B, W.-nr. 1.4112 (DIN X90CrMoV18) pepa maitai kore waikura, pereti, papatahi
AISI 440C, UNS S44004, JIS SUS440C, W.-nr. 1.4125 (DIN X105CrMo17) pepa maitai kore waikura, pereti, papatahi
440A 440B 440C wāhanga matū:
| Tau | C | Si | Mn | S | P | Cr | Ni | Mo |
| 440A | 0.60~0.75 | ≤1 | ≤1 | ≤0.030 | ≤0.040 | 16.00–18.00 | - | ≤0.75 |
| 440B | 0.85~0.95 | ≤1 | ≤1 | ≤0.030 | ≤0.035 | 16.00–18.00 | ≤0.60 | ≤0.75 |
| 440C | 0.95 – 1.20 | ≤1 | ≤1 | ≤0.030 | ≤0.040 | 16.00–18.00 | - | ≤0.75 |
I piki haere tonu te nui o te waro me te pakeke o te 440A-440B-440C mai i te ABC (A-0.75%, B-0.9%, C-1.2%). He maitai kore waikura kounga teitei te 440C, ko tōna pakeke he 56-58 RC. He pai te ātete ki te waikura o ēnei maitai e toru, ko te 440A te mea pai rawa atu, ā, ko te 440C te mea iti rawa. He mea noa te 440C. Ko te hanganga matū o te maitai kore waikura martensitic e tohuhia ana e te tāpiri o ngā huānga pēnei i te molybdenum, te tungsten, te vanadium, me te niobium i runga i te huinga o ngā wāhanga rerekē o te 0.1%-1.0% C me te 12%-27% Cr. Nā te mea he hanganga poraka pokapū-tinana te hanganga kiko, ka heke tere te kaha i ngā pāmahana teitei. I raro iho i te 600 ° C, ko te kaha pāmahana teitei te mea teitei rawa atu i roto i ngā momo maitai kore waikura katoa, ā, ko te kaha ngoki hoki te mea teitei rawa atu. He tino pai ngā āhuatanga tinei me te whakapakeke o te 440A, ā, he tino pakeke hoki. He kaha ake tōna i te maitai 440B me te maitai 440C. E whakamahia ana te 440B mō ngā taputapu tapahi, ngā taputapu ine, ngā peera me ngā takirere. He kaha ake tōna i te maitai 440A, ā, he kaha ake tōna i te maitai 440C. Ko te 440C te mea tino pakeke o ngā maitai kore waikura katoa me ngā maitai ātete wera, ā, e whakamahia ana mō ngā pūwero me ngā peera. He momo maitai te 440F e whakapai ake ana i ngā āhuatanga tapahi ngāwari o te maitai 440C mō ngā mīhini hurihuri aunoa.
Te wā tuku: 17 o Ākuhata-2018