440A, 440B, 440C amashidi ensimbi engagqwali, amapuleti

I-Saky Steel ikhiqiza amashidi ensimbi engagqwali angu-440 aqinile namapuleti 440A, 440B, 440C

I-AISI 440A, UNS S44002, JIS SUS440A, W.-nr. 1.4109 ( DIN X70CrMo15 ) amashidi ensimbi engagqwali, amapuleti, amafulethi

I-AISI 440B, UNS S44003, JIS SUS440B, W.-nr. 1.4112 ( DIN X90CrMoV18 ) amashidi ensimbi engagqwali, amapuleti, amafulethi

I-AISI 440C, UNS S44004, JIS SUS440C, W.-nr. 1.4125 ( DIN X105CrMo17 ) amashidi ensimbi engagqwali, amapuleti, amafulethi

440A 440B 440C isakhi samakhemikhali:

Okuqukethwe kwekhabhoni nobulukhuni be-440A-440B-440C kukhuphuke ngokulandelana ukusuka ku-ABC (A-0.75%, B-0.9%, C-1.2%). I-440C iyinsimbi engagqwali enhle kakhulu ephezulu enobunzima obungu-56-58 RC. Lezi zinsimbi ezintathu zikwazi ukumelana nokugqwala okuhle, i-440A ihamba phambili, kanti i-440C iphansi kakhulu. I-440C ivame kakhulu. Ukwakheka kwamakhemikhali ensimbi engagqwali ye-martensitic kubonakala ngokungezwa kwezakhi ezifana ne-molybdenum, i-tungsten, i-vanadium, ne-niobium ngokusekelwe ekuhlanganiseni kwezingxenye ezihlukene zika-0.1% -1.0% C no-12% -27% Cr. Njengoba ukwakheka kwezicubu kuyisakhiwo se-cubic esigxile emzimbeni, amandla ehla kakhulu emazingeni okushisa aphezulu. Ngaphansi kuka-600 ° C, amandla okushisa aphezulu aphakeme kakhulu kuzo zonke izinhlobo zensimbi engagqwali, futhi amandla okukhasa nawo aphezulu kakhulu. I-440A inezindawo ezinhle kakhulu zokucisha nokuqinisa kanye nobulukhuni obuphezulu. Inokuqina okuphezulu kunensimbi engu-440B nensimbi engu-440C. I-440B isetshenziselwa amathuluzi okusika, amathuluzi okulinganisa, ama-bearings namavalvu. Inokuqina okuphakeme kunensimbi engu-440A kanye nokuqina okuphezulu kunensimbi engu-440C. I-440C inokuqina okuphezulu kakhulu kwazo zonke insimbi engagqwali nensimbi engashisi futhi isetshenziselwa imibhobho namabheringi. I-440F iyizinga lensimbi elithuthukisa izakhiwo ezisikeka kalula zensimbi engu-440C kumalebula azenzakalelayo.