Wehewehea i waenga i te 420 420J1 me te 420J2 nga ahuatanga mahi kowiri tira:
Ko te rereketanga nui i waenga i te kowiri tira 420J1 me te 420J2
Ko te 420J1 he tohu o te kakahu me te aukati i te waikura, te pakeke nui, me tona utu ko te iti iho o nga poi kowiri tira. He pai mo te taiao mahi e hiahia ana te kowiri tira noa.
Ko te 420J2 te whitiki kowiri tira he tohu o te kowiri tira i hangaia i runga i nga paerewa ASTM Amerika; Ko te paerewa Japanese SUS420J2, te paerewa motu hou 30Cr13, te paerewa motu tawhito 3Cr13, te waehere mamati S42030, te paerewa Pakeha 1.4028.
420J1 he kowiri tira: I muri i te tinei, he tiketike te pakeke, he pai te parenga waikura (aukume). I muri i te tinei, 420J2 kowiri tira he uaua atu i te 420J1 maitai (aukume).
Ko te tikanga, ko te pāmahana tinei o 420J1 ko 980 ~ 1050 ℃. Ko te pakeke o te 980 ℃ whakawera hinu tinei he tino iti iho i te 1050 ℃ tinei hinu whakawera. Ko te pakeke i muri i te 980 ℃ tinei hinu he HRC45-50, me te pakeke i muri 1050 ℃ tinei hinu he 2HRC teitei. Heoi, ko te hanganga moroiti i whiwhi i muri i te tinei i te 1050 ℃ he marumaru, he pakarukaru. E taunaki ana kia whakamahia te whakamahana 1000 ℃ me te tinei kia pai ake te hanganga me te pakeke.
Kowiri tira 420 / 420J1 / 420J2 Rau me nga Pereti Koeke Taurite:
| Paerewa | JIS | WERKSTOFF NR. | 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 Rau, Papa Tito Matū (Saky Steel):
| Kōeke | C | Mn | Si | P | S | Cr | Ni | Mo |
| SUS 420 | 0.15 mōrahi | 1.0 mōrahi | 1.0 mōrahi | 0.040 te teitei | 0.030 mōrahi | 12.0-14.0 | - | - |
| SUS 420J1 | 0.16-0.25 | 1.0 mōrahi | 1.0 mōrahi | 0.040 te teitei | 0.030 mōrahi | 12.0-14.0 | - | - |
| SUS 420J2 | 0.26-0.40 | 1.0 mōrahi | 1.0 mōrahi | 0.040 te teitei | 0.030 mōrahi | 12.0-14.0 | - | - |
SS 420 420J1 420J2 Rau, Pereti Nga taonga miihini(saky steel):
| Kōeke | Te Kaha Tensile Max | Te Kaha Tuku (0.2%Wiki) Max | Whakaroa(i roto i te 2 in.) |
| 420 | MPa – 650 | MPa – 450 | 10 % |
| 420J1 | MPa – 640 | MPa – 440 | 20% |
| 420J2 | MPa – 740 | MPa – 540 | 12% |
Ko te pakeke o te 420 raupapa maitai i muri i te maimoatanga wera he tata ki te HRC52~55, a ko te mahi o nga momo ahuatanga penei i te aukati kino kaore i te tino pai. Na te mea he maamaa ake te tapahi me te whakakoi, he pai mo te hanga maripi. Ko te 420 he kowiri tira ka kiia ko te "tapahi karaehe" martensitic steel. 420 raupapa maitai he waikura resistance pai na te iti o te waro ihirangi (ihirangi waro: 0.16~0.25), no reira he maitai pai mo te hanga taputapu ruku.
Wā tuku: Hūrae-07-2020