I-Saky Steel ikhiqiza amashidi namapuleti ensimbi engagqwali e-martensitic aqinile angu-440 ochungechungeni 440A, 440B, 440C
I-AISI 440A, UNS S44002, JIS SUS440A, W.-nr. 1.4109 (DIN X70CrMo15) amashidi ensimbi engagqwali, amapuleti, amafulethi
Amashidi ensimbi engagqwali, amapuleti, amaflethi e-AISI 440B, UNS S44003, JIS SUS440B, W.-nr. 1.4112 (DIN X90CrMoV18)
Amashidi ensimbi engagqwali, amapuleti, amaflethi e-AISI 440C, UNS S44004, JIS SUS440C, W.-nr. 1.4125 (DIN X105CrMo17)
Ingxenye yamakhemikhali engu-440A 440B 440C:
| Ibanga | C | Si | Mn | S | P | Cr | Ni | Mo |
| 440A | 0.60~0.75 | ≤1 | ≤1 | ≤0.030 | ≤0.040 | 16.00～18.00 | - | ≤0.75 |
| 440B | 0.85～0.95 | ≤1 | ≤1 | ≤0.030 | ≤0.035 | 16.00～18.00 | ≤0.60 | ≤0.75 |
| 440C | 0.95 – 1.20 | ≤1 | ≤1 | ≤0.030 | ≤0.040 | 16.00～18.00 | - | ≤0.75 |
Okuqukethwe kwekhabhoni kanye nobunzima be-440A-440B-440C kukhuphuke ngokulandelana kusuka ku-ABC (A-0.75%, B-0.9%, C-1.2%). I-440C iyinsimbi engagqwali enhle kakhulu esezingeni eliphezulu enobunzima be-56-58 RC. Lezi zinsimbi ezintathu zinokumelana okuhle nokugqwala, i-440A iyona engcono kakhulu, kanti i-440C iyona ephansi kakhulu. I-440C ivame kakhulu. Ukwakheka kwamakhemikhali kwensimbi engagqwali ye-martensitic kubonakaliswa ngokungezwa kwezinto ezifana ne-molybdenum, i-tungsten, i-vanadium, ne-niobium ngokusekelwe ekuhlanganisweni kwezingxenye ezahlukene ze-0.1%-1.0% C kanye ne-12%-27% Cr. Njengoba isakhiwo sezicubu siyisakhiwo se-cubic esigxile emzimbeni, amandla ehla kakhulu emazingeni okushisa aphezulu. Ngaphansi kuka-600 ° C, amandla okushisa aphezulu aphezulu kakhulu kuzo zonke izinhlobo zensimbi engagqwali, futhi amandla okuhamba nawo aphezulu kakhulu. I-440A inezakhiwo ezinhle kakhulu zokucima nokuqinisa kanye nokuqina okuphezulu. Inokuqina okuphezulu kunensimbi engu-440B kanye nensimbi engu-440C. I-440B isetshenziselwa amathuluzi okusika, amathuluzi okulinganisa, amabheringi namavalvu. Inokuqina okuphezulu kunensimbi engu-440A kanye nokuqina okuphezulu kunensimbi engu-440C. I-440C inokuqina okuphezulu kakhulu kunayo yonke insimbi engagqwali kanye nensimbi engashisi futhi isetshenziselwa ama-nozzle namabheringi. I-440F iyizinga lensimbi elithuthukisa izakhiwo ezilula zokusika zensimbi engu-440C zama-lathe azenzakalelayo.
Isikhathi sokuthunyelwe: Agasti-17-2018