Irin simẹnti, eyi ti o tun npe ni nodular iron tabi spheroidal graphite (SG) simẹnti iron, kii ṣe ohun elo kan ṣugbọn o jẹ apakan ti ẹgbẹ awọn ohun elo ti o le ṣe lati ni awọn ohun-ini pupọ nipasẹ iṣakoso ti microstructure. Nodular simẹnti irin gba nodular lẹẹdi nipasẹ spheroidization ati inoculation itọju, eyi ti o fe ni mu awọn darí-ini ti awọn simẹnti irin, paapa awọn ṣiṣu ati toughness, ki o le gba agbara ti o ga ju erogba irin. Irin simẹnti Nodular jẹ ohun elo irin simẹnti ti o ga julọ. Awọn ohun-ini okeerẹ rẹ sunmọ si irin. Da lori awọn ohun-ini ti o dara julọ, irin ductile ti ni aṣeyọri ti lo fun awọn paati simẹnti ti awọn ipa idiju, agbara, lile ati resistance resistance. Irin simẹnti Nodular ti ni idagbasoke ni kiakia sinu ohun elo irin simẹnti ni keji nikan si simẹnti grẹy ati lilo pupọ. Ohun ti a pe ni “irin aropo irin” ni pataki tọka si irin ductile. Irin ductile nigbagbogbo ni a lo lati ṣe awọn ẹya fun awọn crankshafts ati awọn camshafts fun awọn ọkọ ayọkẹlẹ, awọn tractors, ati awọn ẹrọ ijona inu, ati awọn falifu alabọde-titẹ fun ẹrọ gbogbogbo.
Iwa asọye ti o wọpọ ti irin simẹnti ductile jẹ apẹrẹ ti lẹẹdi naa. Ni awọn irin ductile, graphite wa ni irisi nodules kuku ju awọn flakes bi o ti wa ni irin grẹy. Apẹrẹ didasilẹ ti awọn flakes ti graphite ṣẹda awọn aaye ifọkansi wahala laarin matrix irin ati apẹrẹ yika ti awọn nodules kere si, nitorinaa ṣe idiwọ ẹda ti awọn dojuijako ati pese imudara ductility ti o fun alloy orukọ rẹ. Ipilẹṣẹ awọn nodules waye nipasẹ afikun awọn eroja nodulizing, magnẹsia ti o wọpọ julọ (akọsilẹ iṣuu magnẹsia õwo ni 1100 ° C ati irin yo ni 1500 ° C) ati, kere si nigbagbogbo, cerium (nigbagbogbo ni irisi Mischmetal). Tellurium tun ti lo. Yttrium, nigbagbogbo paati ti Misch metal, tun ti ṣe iwadi bi nodulizer ti o ṣeeṣe.
| Mechanical Properties of Ductile (Nodular) Iron | ||||||||
| Ohun kan ni ibamu si DIN EN 1563 | Iwọn Iwọn | 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 | ||
| Agbara fifẹ | Rm min.MPA | 350 | 400 | 400 | 500 | 600 | 700 | 800 |
| 2% Agbara Ikore | RP0.2 min.MPA | 220 | 240 | 250 | 320 | 370 | 420 2) | 480 2) |
| Ilọsiwaju | A% | 22,0 | 18,0 | 18,0 | 7,0 | 3,0 | 2,0 | 2,0 |
| Lile | HB | 110-150 | 120-160 | 140-190 | 170-220 | 200-250 | 230-280 | 250-330 |
| Awọn ẹya ara ẹrọ | o kun ferritic | o kun ferritic | o kun ferritic | ferritic + pearlite | ferritic + pearlite | o kun pearlite | gbogbo pearlite | |
| Idanwo ikolu ti ISO-V nipasẹ -40 ± 2ºC | 12,0 | |||||||
| Idanwo ikolu ti ISO-V nipasẹ -20 ± 2ºC | 12,0 | |||||||
| Idanwo ikolu ti ISO-V nipasẹ +23 ± 5ºC | Kv min.J | 17,0 3) | 14,0 3) | |||||
| Wahala rirẹ | σaB MPa | 315 | 360 | 360 | 450 | 540 | 630 | 720 |
| Torsion | TtB MPa | 315 | 360 | 360 | 450 | 540 | 630 | 720 |
| Modulu ti elasticity | E GPA | 170 | 170 | 170 | 175 | 175 | 175 | 175 |
| Nọmba oloro | v – | 0,280 | 0,280 | 0,280 | 0,280 | 0,280 | 0,280 | 0,280 |
| Agbara titẹ | σdB MPa | – | 700 | 700 | 800 | 870 | 1000 | 1150 |
| Frature Toughness | Klc MPa ·√m | 31 | 30 | 30 | 25 | 20 | 15 | 14 |
| iwuwo | g/cm3 | 7,1 | 7,1 | 7,1 | 7,1 | 7,2 | 7,2 | 7,2 |
Iyanrin Mold Simẹnti Foundry ni China
Akoko ifiweranṣẹ: Oṣu Kẹta-18-2021