I-Saky Steel ivelisa amaphepha entsimbi engenasici kunye neepleyiti ze-martensitic eziqinileyo ezingama-440 series 440A, 440B, 440C
I-AISI 440A, UNS S44002, JIS SUS440A, W.-nr. 1.4109 (DIN X70CrMo15) amashiti entsimbi engagqwaliyo, iipleyiti, iiflethi
I-AISI 440B, UNS S44003, JIS SUS440B, W.-nr. 1.4112 (DIN X90CrMoV18) amashiti entsimbi engagqwaliyo, iipleyiti, iiflethi
I-AISI 440C, UNS S44004, JIS SUS440C, W.-nr. 1.4125 (DIN X105CrMo17) amashiti entsimbi engagqwaliyo, iipleyiti, iiflethi
Icandelo leekhemikhali le-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 |
Umxholo wekhabhoni kunye nobunzima be-440A-440B-440C bunyuke ngokulandelelana ukusuka kwi-ABC (A-0.75%, B-0.9%, C-1.2%). I-440C yintsimbi engagqwaliyo entle kakhulu enobunzima be-56-58 RC. Ezi ntsimbi zintathu zinokumelana okuhle nokugqwala, i-440A yeyona ilungileyo, kwaye i-440C yeyona iphantsi. I-440C ixhaphake kakhulu. Ukwakheka kweekhemikhali zentsimbi engagqwaliyo ye-martensitic kubonakala ngokongeza izinto ezifana ne-molybdenum, i-tungsten, i-vanadium, kunye ne-niobium ngokusekelwe kudibaniso lwezinto ezahlukeneyo ze-0.1%-1.0% C kunye ne-12%-27% Cr. Ekubeni isakhiwo sezicubu sisakhiwo se-cubic esisekwe emzimbeni, amandla ehla kakhulu kumaqondo obushushu aphezulu. Ngaphantsi kwe-600 ° C, amandla obushushu aphezulu aphezulu phakathi kwazo zonke iintlobo zentsimbi engagqwali, kwaye amandla okuqhekeka nawo aphezulu. I-440A ineempawu ezintle kakhulu zokucima nokuqinisa kunye nobunzima obuphezulu. Inobunzima obuphezulu kunentsimbi ye-440B kunye nentsimbi ye-440C. I-440B isetyenziselwa izixhobo zokusika, izixhobo zokulinganisa, iibheringi kunye neevalvu. Inobunzima obuphezulu kunentsimbi ye-440A kunye nobunzima obuphezulu kunentsimbi ye-440C. I-440C inobunzima obuphezulu kunayo yonke intsimbi engatyiwayo kunye nentsimbi engatshisi kwaye isetyenziselwa ii-nozzles kunye neebheringi. I-440F ludidi lwentsimbi oluphucula iimpawu ezilula zokusika zentsimbi ye-440C kwiilathe ezizenzekelayo.
Ixesha leposi: Agasti-17-2018