Khetholla lipakeng tsa 420 420J1 le 420J2 litšobotsi tsa ts'ebetso ea tšepe e sa hloekang:
Phapang e kholo pakeng tsa tšepe e sa hloekang 420J1 le 420J2
420J1 e na le tekanyo e itseng ea ho hanyetsa ho apara le ho hanyetsa kutu, boima bo phahameng, 'me theko ea eona ke e ka tlaase ho libolo tsa tšepe tse sa hloekang. E loketse tikoloho ea ho sebetsa e hlokang tšepe e tloaelehileng e sa hloekang.
420J2 lebanta la tšepe ke letšoao la tšepe e sa hloekang e hlahisoang ho latela litekanyetso tsa ASTM tsa Amerika; Tekanyetso ea Sejapane ea SUS420J2, maemo a macha a naha a 30Cr13, maemo a khale a naha a 3Cr13, khoutu ea dijithale S42030, maemo a Europe 1.4028.
420J1 tšepe e sa hloekang: Ka mor'a ho tima, boima bo phahame, 'me ho hanyetsa ha kutu ho molemo (magnetic). Ka mor'a ho tima, 420J2 tšepe e sa hloekang e thata ho feta 420J1 tšepe (magnetic).
Ka kakaretso, mocheso oa quenching oa 420J1 ke 980 ~ 1050 ℃. Ho thatafala ha 980 ℃ ho tima oli e futhumatsang ho tlase haholo ho feta 1050 ℃ ho tima oli e futhumatsang. Ho thatafala ka mor'a ho tima oli ka 980 ℃ ke HRC45-50, 'me ho thatafala ka mor'a ho tima oli ka 1050 ℃ ke 2HRC e phahameng. Leha ho le joalo, microstructure e fumanoeng ka mor'a ho tima ho 1050 ℃ e mahoashe ebile e brittle. Ho khothalletsoa ho sebelisa 1000 ℃ ho futhumatsa le ho tima ho fumana sebopeho se betere le ho thatafala.
Stainless Steel 420 / 420J1 / 420J2 Maqephe le Lipoleiti Mephato e Tšoanang:
| TS'ELISO | JIS | WERKSTOFF NR. | BS | HLOMPHO | SIS | UNS | AISI |
| SS420 | SUS 420 | 1.4021 | 420S29 | - | 2303 | S42000 | 420 |
| SS 420J1 | Tlhaloso: SUS420J1 | 1.4021 | 420S29 | Z20C13 | 2303 | S42010 | 420L |
| SS 420J2 | Tlhaloso: SUS420J2 | 1.4028 | 420S37 | Z20C13 | 2304 | S42010 | 420M |
SS420 / 420J1/ 420J2 Sheets, Plates Chemical Composition (saky steel):
| Kereiti | C | Mn | Si | P | S | Cr | Ni | Mo |
| SUS 420 | 0.15 max | 1.0 max | 1.0 max | 0.040 boholo | 0.030 boholo | 12.0-14.0 | - | - |
| Tlhaloso: SUS420J1 | 0.16-0.25 | 1.0 max | 1.0 max | 0.040 boholo | 0.030 boholo | 12.0-14.0 | - | - |
| Tlhaloso: SUS420J2 | 0.26-0,40 | 1.0 max | 1.0 max | 0.040 boholo | 0.030 boholo | 12.0-14.0 | - | - |
SS 420 420J1 420J2 Sheets, Plates Mechanical properties(saky steel):
| Kereiti | Tensile Strength Max | Kotulo ea Matla (0.2%Offset) Max | Elongation(ka hare ho 2 in.) |
| 420 | MPa - 650 | MPa - 450 | 10% |
| 420J1 | MPa - 640 | MPa - 440 | 20% |
| 420J2 | MPa - 740 | MPa - 540 | 12% |
Ho thatafala ha tšepe ea 420 ka mor'a phekolo ea mocheso e batla e le HRC52 ~ 55, 'me ts'ebetso ea likarolo tse fapaneng tse kang ho hanyetsa tšenyo ha e hlahelle haholo. Hobane ho bonolo ho khaola le ho bentša, ho loketse ho hlahisa lithipa. 420 tšepe e sa hloekang e boetse e bitsoa "seha grade" martensitic tšepe. 420 letoto la tšepe le na le khanyetso e ntle ea mafome ka lebaka la khabone e tlase (kahare ea khabone: 0.16 ~ 0.25), ka hona ke tšepe e ntle bakeng sa tlhahiso ea lisebelisoa tsa ho qoela.
Nako ea poso: Jul-07-2020