Te wehewehe i waenga i ngā āhuatanga mahi o te maitai kore waikura 420 420J1 me te 420J2:
Ko te rerekētanga matua i waenga i te kowiri tira 420J1 me te 420J2
He ātete te 420J1 ki te kakahu me te waikura, he pakeke rawa, ā, he iti ake te utu o ngā pōro kowiri tira. He pai mō te taiao mahi e hiahia ana ki te kowiri tira noa.
Ko te whitiki kowiri tira 420J2 he waitohu kowiri tira i hangaia i runga anō i ngā paerewa ASTM o Amerika; te paerewa Hapanihi SUS420J2, te paerewa ā-motu hou 30Cr13, te paerewa ā-motu tawhito 3Cr13, te waehere matihiko S42030, te paerewa Pākehā 1.4028.
Kowiri tira 420J1: I muri i te tineitanga, he teitei te pakeke, ā, he pai te ātete ki te waikura (aukume). I muri i te tineitanga, he mārō ake te kowiri tira 420J2 i te kowiri tira 420J1 (aukume).
Ko te pāmahana tinei o te 420J1 i te nuinga o te wā he 980~1050℃. He iti iho te pakeke o te tinei hinu whakamahana 980℃ i te tinei hinu whakamahana 1050℃. Ko te pakeke i muri i te tinei hinu 980℃ he HRC45-50, ā, ko te pakeke i muri i te tinei hinu 1050℃ he 2HRC teitei ake. Heoi, ko te hanganga moroiti i whiwhi i muri i te tinei i te 1050℃ he taratara, he pakarukaru. E taunakihia ana kia whakamahia te whakamahana me te tinei 1000℃ kia pai ake ai te hanganga me te pakeke.
Ngā Rau me ngā Pereti Kowiri tira 420 / 420J1 / 420J2 Ngā Kaupae ōrite:
| PAEREWA | JIS | Nama WERKSTOFF | BS | AFNOR | SIS | UNS | AISI |
| SS 420 | SUS 420 | 1.4021 | 420S29 | - | 2303 | S42000 | 420 |
| SS 420J1 | SUS 420J1 | 1.4021 | 420S29 | Z20C13 | 2303 | S42010 | 420L |
| SS 420J2 | SUS 420J2 | 1.4028 | 420S37 | Z20C13 | 2304 | S42010 | 420M |
SS420 / 420J1/ 420J2 Ngā Rau, Ngā Pereti Te Hanganga Matū (te maitai saky):
| Tau | C | Mn | Si | P | S | Cr | Ni | Mo |
| SUS 420 | 0.15 mōrahi | 1.0 mōrahi | 1.0 mōrahi | 0.040 mōrahi | 0.030 mōrahi | 12.0-14.0 | - | - |
| SUS 420J1 | 0.16-0.25 | 1.0 mōrahi | 1.0 mōrahi | 0.040 mōrahi | 0.030 mōrahi | 12.0-14.0 | - | - |
| SUS 420J2 | 0.26-0.40 | 1.0 mōrahi | 1.0 mōrahi | 0.040 mōrahi | 0.030 mōrahi | 12.0-14.0 | - | - |
Ngā Pepa, ngā Pereti SS 420 420J1 420J2 Ngā āhuatanga hangarau (te maitai saky):
| Tau | Te Kaha Kume Mōrahi | Kaha Hua (0.2% Whakakorenga) Mōrahi | Te roa (i roto i te 2 inihi) |
| 420 | MPa – 650 | MPa – 450 | 10% |
| 420J1 | MPa – 640 | MPa – 440 | 20% |
| 420J2 | MPa – 740 | MPa – 540 | 12% |
Ko te pakeke o te maitai raupapa 420 i muri i te whakamahana he tata ki te HRC52~55, ā, kāore i te tino pai te mahi a ngā āhuatanga maha pēnei i te ātete ki te pakaru. Nā te mea he māmā ake te tapahi me te whakakanapa, he pai mō te hanga maripi. Ka kiia hoki te maitai kowiri tira 420 he maitai martensitic "papa tapahi". He tino pai te ātete ki te waikura o te maitai raupapa 420 nā te iti o te ihirangi waro (ihirangi waro: 0.16~0.25), nō reira he maitai tino pai mō te hanga taputapu ruku.
Wā tuku: Hōngongoi-07-2020