Ductile cast iron, eo hape e bitsoang nodular iron or spheroidal graphite (SG) cast iron, ha se ntho e le 'ngoe empa ke karolo ea sehlopha sa lisebelisoa tse ka hlahisoang ho ba le mefuta e mengata ea thepa ka ho laola microstructure. Nodular cast iron e fumana nodular graphite ka phekolo ea spheroidization le inoculation, e leng ho ntlafatsa ka katleho thepa ea mochine oa tšepe ea tšepe, haholo-holo polasetiki le ho tiea, e le ho fumana matla a phahameng ho feta carbon steel. Nodular cast iron ke thepa ea tšepe e nang le matla a phahameng. Thepa ea eona e pharaletseng e haufi le tšepe. Ho itšetlehile ka thepa ea eona e babatsehang, tšepe ea ductile e 'nile ea sebelisoa ka katleho bakeng sa ho lahla likarolo tsa matla a rarahaneng, matla, ho tiea le ho hanyetsa ho apara. Nodular cast iron e se e ntlafalitse ka potlako ho ba thepa ea tšepe ea bobeli ho ea ho tšepe e bohlooho mme e sebelisoa haholo. Seo ho thoeng ke "tšepe e nkelang sebaka bakeng sa tšepe" haholo-holo e bua ka tšepe ea ductile. Hangata tšepe e sebelisoa ho hlahisa likarolo tsa li-crankshaft le li-camshaft bakeng sa likoloi, literekere le lienjine tse tukang ka hare, hammoho le li-valve tsa khatello e mahareng bakeng sa mechini e akaretsang.
Sebopeho se tloaelehileng sa ductile cast iron ke sebopeho sa graphite. Ka litšepe tsa ductile, graphite e ka sebopeho sa maqhutsu ho e-na le li-flakes joalokaha e le ka tšepe e bohlooho. Sebopeho se hlabang sa li-flakes tsa graphite se etsa hore ho be le lintlha tsa khatello ea kelello ka har'a matrix ea tšepe le sebōpeho se chitja sa li-nodule tse fokolang haholo, kahoo li thibela ho thehoa ha mapetsong le ho fana ka ductility e ntlafetseng e fanang ka alloy lebitso la eona. Sebopeho sa li-nodule se finyelloa ka ho eketsoa ha likarolo tsa nodulizing, hangata magnesium (hlokomela magnesium e pheha ka 1100 ° C le tšepe e qhibiliha ka 1500 ° C) 'me, hangata, cerium (hangata e le Mischmetal). Tellurium e boetse e sebelisoa. Yttrium, eo hangata e leng karolo ea Misch metal, e boetse e ithutoa e le nodulizer e ka khonehang.
| Thepa ea Mechini ea Tšepe ea Ductile (Nodular). | ||||||||
| Ntho ho latela DIN EN 1563 | Lekanya Yuniti | EN-GJS-350-22-LT | EN-GJS-400-18-LT | EN-GJS-400-18 | EN-GJS-500-7 | EN-GJS-600-3 | EN-GJS-700-2 | EN-GJS-800-2 |
| EN-JS 1015 | EN-JS 1025 | EN-JS 1020 | EN-JS 1050 | EN-JS 1060 | EN-JS 1070 | EN-JS 1080 | ||
| Matla a tšepe | Rm min.MPA | 350 | 400 | 400 | 500 | 600 | 700 | 800 |
| 2% Matla a Puno | Rp0.2 mets.MPA | 220 | 240 | 250 | 320 | 370 | 420 2) | 480 2) |
| Elongation | A % | 22,0 | 18,0 | 18,0 | 7,0 | 3,0 | 2,0 | 2,0 |
| Ho thatafala | HB | 110-150 | 120-160 | 140-190 | 170-220 | 200-250 | 230-280 | 250-330 |
| Mehaho | haholo-holo ferritic | haholo-holo ferritic | haholo-holo ferritic | ferritic + perela | ferritic + perela | haholo-holo perela | tsohle pearlite | |
| Teko ea tšusumetso ea ISO-V ka -40 ± 2 ºC | 12,0 | |||||||
| Teko ea tšusumetso ea ISO-V ka -20 ± 2 ºC | 12,0 | |||||||
| Teko ea tšusumetso ea ISO-V ka +23 ± 5 ºC | Kv min.J | 17,0 3) | 14,0 3) | |||||
| Ho Shear Khatello | seB MPa | 315 | 360 | 360 | 450 | 540 | 630 | 720 |
| Torsion | TB MPa | 315 | 360 | 360 | 450 | 540 | 630 | 720 |
| Li-module tsa elasticity | E GPA | 170 | 170 | 170 | 175 | 175 | 175 | 175 |
| Nomoro ea Poisson | v - | 0,280 | 0,280 | 0,280 | 0,280 | 0,280 | 0,280 | 0,280 |
| Matla a Khatellang | σdB MPa | - | 700 | 700 | 800 | 870 | 1000 | 1150 |
| Frature Toughness | Klc MPa ·√m | 31 | 30 | 30 | 25 | 20 | 15 | 14 |
| Botenya | g/cm3 | 7,1 | 7,1 | 7,1 | 7,1 | 7,2 | 7,2 | 7,2 |
Lehlabathe Mold Casting Foundry in China
Nako ea poso: Mar-18-2021