Hlukanisa phakathi kwezimpawu zokusebenza kwensimbi engagqwali engu-420 420J1 kanye ne-420J2:
Umehluko omkhulu phakathi kwensimbi engagqwali engu-420J1 kanye ne-420J2
I-420J1 inezinga elithile lokumelana nokuguguleka kanye nokumelana nokugqwala, ubulukhuni obuphezulu, futhi intengo yayo iphansi kakhulu kunezingqimba zensimbi engagqwali. Ifanele indawo yokusebenza edinga insimbi engagqwali evamile.
Ibhande lensimbi engagqwali elingu-420J2 liwuhlobo lwensimbi engagqwali ekhiqizwa ngokuhambisana nezindinganiso zaseMelika ze-ASTM; izinga laseJapan i-SUS420J2, izinga elisha likazwelonke elingu-30Cr13, izinga elidala likazwelonke elingu-3Cr13, ikhodi yedijithali i-S42030, izinga laseYurophu elingu-1.4028.
Insimbi engagqwali engu-420J1: Ngemva kokucima, ubulukhuni buphezulu, futhi ukumelana nokugqwala kuhle (magnetic). Ngemva kokucima, insimbi engagqwali engu-420J2 ilukhuni kunensimbi engu-420J1 (magnetic).
Ngokuvamile, izinga lokushisa lokucima elingu-420J1 lingu-980~1050℃. Ubulukhuni bokucima uwoyela wokushisa ongu-980℃ buphansi kakhulu kunokucima uwoyela wokushisa ongu-1050℃. Ubulukhuni ngemva kokucima uwoyela ongu-980℃ bungu-HRC45-50, kanti ubulukhuni ngemva kokucima uwoyela ongu-1050℃ buphakeme ngo-2HRC. Kodwa-ke, isakhiwo esincane esitholwe ngemva kokucima ku-1050℃ siqinile futhi siyaphuka. Kunconywa ukusebenzisa ukushisa nokucima okungu-1000℃ ukuze uthole isakhiwo nokuqina okungcono.
Insimbi Engagqwali 420 / 420J1 / 420J2 Amashidi Namapuleti Alinganayo Amabanga:
| IZINGA | I-JIS | I-WERKSTOFF NR. | BS | I-AFNOR | I-SIS | I-UNS | I-AISI |
| I-SS 420 | I-SUS 420 | 1.4021 | 420S29 | - | 2303 | I-S42000 | 420 |
| I-SS 420J1 | I-SUS 420J1 | 1.4021 | 420S29 | I-Z20C13 | 2303 | S42010 | 420L |
| I-SS 420J2 | I-SUS 420J2 | 1.4028 | 420S37 | I-Z20C13 | 2304 | S42010 | 420M |
I-SS420/420J1/ Amashidi angu-420J2, Amapuleti Ukwakheka Kwamakhemikhali (insimbi egobile):
| Ibanga | C | Mn | Si | P | S | Cr | Ni | Mo |
| I-SUS 420 | Ubuningi obungu-0.15 | Ubuningi obungu-1.0 | Ubuningi obungu-1.0 | Umkhawulo ongu-0.040 | Umkhawulo ongu-0.030 | 12.0-14.0 | - | - |
| I-SUS 420J1 | 0.16-0.25 | Ubuningi obungu-1.0 | Ubuningi obungu-1.0 | Umkhawulo ongu-0.040 | Umkhawulo ongu-0.030 | 12.0-14.0 | - | - |
| I-SUS 420J2 | 0.26-0.40 | Ubuningi obungu-1.0 | Ubuningi obungu-1.0 | Umkhawulo ongu-0.040 | Umkhawulo ongu-0.030 | 12.0-14.0 | - | - |
Amashidi e-SS 420 420J1 420J2, Amapuleti Izakhiwo zemishini (insimbi egobile):
| Ibanga | Amandla Okuqinela Aphezulu | Amandla Okukhiqiza (0.2%Offset) Ubuningi | Ukwelulwa (ngamasentimitha angu-2) |
| 420 | I-MPa – 650 | I-MPa – 450 | 10% |
| 420J1 | I-MPa – 640 | I-MPa – 440 | 20% |
| 420J2 | I-MPa – 740 | I-MPa – 540 | 12% |
Ukuqina kwensimbi yochungechunge lwe-420 ngemuva kokwelashwa kokushisa kucishe kube yi-HRC52~55, futhi ukusebenza kwezici ezahlukahlukene njengokumelana nomonakalo akuvelele kakhulu. Ngenxa yokuthi kulula ukuyisika nokuyipholisha, ifaneleka ekukhiqizweni kwemimese. Insimbi engagqwali engu-420 ibizwa nangokuthi insimbi ye-martensitic “yezinga lokusika”. Insimbi yochungechunge lwe-420 inokumelana nokugqwala okuhle kakhulu ngenxa yokuqukethwe kwayo okuphansi kwekhabhoni (okuqukethwe kwekhabhoni: 0.16~0.25), ngakho-ke iyinsimbi efanelekile yokukhiqiza amathuluzi okuntywila.
Isikhathi sokuthunyelwe: Julayi-07-2020