I-Ductile cast iron, ebizwa nangokuthi i-nodular iron noma i-spheroidal graphite (SG) cast iron, ayiyona into eyodwa kodwa iyingxenye yeqoqo lezinto ezingakhiqizwa ukuze zibe nezinhlobonhlobo zezakhiwo ngokulawula i-microstructure. I-nodular cast iron ithola i-nodular graphite ngokusebenzisa i-spheroidization kanye nokwelashwa kwe-inoculation, okuthuthukisa ngokuphumelelayo izakhiwo zemishini yensimbi ekhonjiwe, ikakhulukazi i-plasticity nokuqina, ukuze uthole amandla aphezulu kune-carbon steel. I-Nodular cast iron iyinsimbi eqinile ephezulu. Izakhiwo zayo eziphelele ziseduze nensimbi. Ngokusekelwe ezintweni zayo ezinhle kakhulu, i-iron ductile isetshenziswe ngempumelelo ukusakaza izingxenye zamandla ayinkimbinkimbi, amandla, ukuqina nokumelana nokugqoka. Insimbi eyi-nodular cast iron ithuthuke ngokushesha yaba insimbi eyinsimbi yesibili emva kwe-grey cast iron futhi isetshenziswa kabanzi. Okubizwa ngokuthi "insimbi efaka esikhundleni sensimbi" ikakhulukazi ibhekisela ku-iron ductile. I-Ductile iron ivame ukusetshenziselwa ukukhiqiza izingxenye zama-crankshafts nama-camshaft ezimoto, ogandaganda, nezinjini ezivuthayo zangaphakathi, kanye nama-valve anomfutho omaphakathi wemishini ejwayelekile.
Isici esivamile esichazayo se-ductile cast iron ukuma kwegraphite. Kuma-ayina ama-ductile, i-graphite isesimweni samaqhuqhuva esikhundleni sama-flakes njengoba isensimbi empunga. Ukuma okucijile kwama-flakes e-graphite kudala amaphuzu okugxilisa ingcindezi ngaphakathi kwe-matrix yensimbi kanye nesimo esiyindilinga samaqhuqhuva sibe sincane kakhulu, ngaleyo ndlela kuvinjwe ukudalwa kwemifantu futhi kunikeze i-ductility ethuthukisiwe enikeza ingxubevange igama layo. Ukwakheka kwamaqhuqhuva kufezwa ngokungezwa kwezakhi eziguquguqukayo, ngokuvamile i-magnesium (inothi i-magnesium ibilisa ku-1100 ° C futhi insimbi iyancibilika ku-1500 ° C) futhi, kancane kancane manje, i-cerium (imvamisa isesimweni se-Mischmetal). I-Tellurium nayo isetshenzisiwe. I-Yttrium, evame ukuba yingxenye ye-Misch metal, nayo iye yacutshungulwa njenge-nodulizer engenzeka.
| Izakhiwo Zemishini Ye-Ductile (Nodular) Iron | ||||||||
| Into ngokuya nge-DIN EN 1563 | Iyunithi yokukala | 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 | ||
| Amandla Okuqina | I-Rm min.MPA | 350 | 400 | 400 | 500 | 600 | 700 | 800 |
| 2% Amandla Esivuno | I-Rp0.2 min.MPA | 220 | 240 | 250 | 320 | 370 | 420 2) | 480 2) |
| Ukwelula | A % | 22,0 | 18,0 | 18,0 | 7,0 | 3,0 | 2,0 | 2,0 |
| Ukuqina | HB | 110-150 | 120-160 | 140-190 | 170-220 | 200-250 | 230-280 | 250-330 |
| Izakhiwo | ikakhulukazi i-ferritic | ikakhulukazi i-ferritic | ikakhulukazi i-ferritic | i-ferritic + pearlite | i-ferritic + pearlite | ikakhulukazi i-pearlite | yonke i-pearlite | |
| Ukuhlolwa komthelela we-ISO-V ngo -40 ± 2 ºC | 12,0 | |||||||
| Ukuhlolwa komthelela we-ISO-V ngo -20 ± 2 ºC | 12,0 | |||||||
| Ukuhlolwa komthelela we-ISO-V ngo-+23 ± 5 ºC | Kv min.J | 17, 0 3) | 14,0 3) | |||||
| Shear Stress | i-MPa | 315 | 360 | 360 | 450 | 540 | 630 | 720 |
| I-Torsion | I-TTB MPa | 315 | 360 | 360 | 450 | 540 | 630 | 720 |
| Amamojula we-elasticity | E GPA | 170 | 170 | 170 | 175 | 175 | 175 | 175 |
| Inombolo ye-Poisson | v - | 0,280 | 0,280 | 0,280 | 0,280 | 0,280 | 0,280 | 0,280 |
| Amandla Acindezelayo | σdB MPa | - | 700 | 700 | 800 | 870 | 1000 | 1150 |
| I-Frature Toughness | Klc MPa ·√m | 31 | 30 | 30 | 25 | 20 | 15 | 14 |
| Ukuminyana | g/cm3 | 7,1 | 7,1 | 7,1 | 7,1 | 7,2 | 7,2 | 7,2 |
I-Sand Mold Casting Foundry e-China
Isikhathi sokuthumela: Mar-18-2021