Tandukanya hagati ya 420 420J1 na 420J2 ibiranga ibyuma bidafite ingese:
Itandukaniro nyamukuru hagati yicyuma 420J1 na 420J2
420J1 ifite urwego runaka rwo kurwanya kwambara no kurwanya ruswa, ubukana bwinshi, kandi igiciro cyayo ni munsi yumupira wibyuma.Irakwiriye kubikorwa bikora bisaba ibyuma bisanzwe bidafite ingese.
420J2 umukandara w'icyuma ni ikirango cy'icyuma kidafite ingero zakozwe hakurikijwe amahame ya ASTM y'Abanyamerika;Ikiyapani gisanzwe SUS420J2, urwego rushya rwigihugu 30Cr13, urwego rwigihugu rwa kera 3Cr13, code ya digitale S42030, uburayi 1.4028.
420J1 ibyuma bidafite ingese: Nyuma yo kuzimya, ubukana buri hejuru, kandi kurwanya ruswa ni byiza (magnetique).Nyuma yo kuzimya, 420J2 ibyuma bidafite ingese birakomeye kuruta ibyuma 420J1 (magnetique).
Mubisanzwe, kuzimya ubushyuhe bwa 420J1 ni 980 ~ 1050 ℃.Ubukomere bwa 980 ℃ gushyushya amavuta kuzimya biri munsi ya 1050 ℃ kuzimya amavuta.Ubukomere nyuma yo kuzimya 980 ℃ amavuta ni HRC45-50, naho ubukana nyuma ya 1050 qu kuzimya amavuta ni 2HRC hejuru.Nyamara, microstructure yabonetse nyuma yo kuzimya 1050 ℃ ni ntoya kandi yoroheje.Birasabwa gukoresha 1000 ℃ gushyushya no kuzimya kugirango ubone imiterere nubukomezi.
Ibyuma bitagira umwanda 420 / 420J1 / 420J2 Amabati hamwe namasahani amanota angana:
| STANDARD | 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 Amabati, Isahani Ibigize imiti (ibyuma bya saky):
| Icyiciro | C | Mn | Si | P | S | Cr | Ni | Mo |
| SUS 420 | 0.15 max | 1.0 max | 1.0 max | 0.040 max | 0.030 max | 12.0-14.0 | - | - |
| SUS 420J1 | 0.16-0.25 | 1.0 max | 1.0 max | 0.040 max | 0.030 max | 12.0-14.0 | - | - |
| SUS 420J2 | 0.26-0.40 | 1.0 max | 1.0 max | 0.040 max | 0.030 max | 12.0-14.0 | - | - |
SS 420 420J1 420J2 Amabati, Isahani Ibikoresho bya mashini (ibyuma byoroshye):
| Icyiciro | Imbaraga zingana | Imbaraga Zitanga (0.2% Offset) Byinshi | Kurambura (muri 2 muri.) |
| 420 | MPa - 650 | MPa - 450 | 10% |
| 420J1 | MPa - 640 | MPa - 440 | 20% |
| 420J2 | MPa - 740 | MPa - 540 | 12% |
Ubukomezi bwibyuma 420 nyuma yo kuvura ubushyuhe ni HRC52 ~ 55, kandi imikorere yibintu bitandukanye nko kurwanya ibyangiritse ntabwo igaragara cyane.Kuberako byoroshye gukata no gusya, birakwiriye kubyara ibyuma.420 ibyuma bidafite ingese byitwa kandi "gukata urwego" martensitike.Ibyuma 420 byuruhererekane bifite imbaraga zo kurwanya ingese kubera karuboni nkeya (ibirimo karubone: 0.16 ~ 0.25), bityo rero nicyuma cyiza cyo gukora ibikoresho byo kwibira.
Igihe cyo kohereza: Nyakanga-07-2020