Ductile cam khwb cia hlau, uas tseem hu ua nodular hlau los yog spheroidal graphite (SG) cam khwb cia hlau, tsis yog ib qho khoom siv tab sis yog ib feem ntawm ib pawg ntawm cov ntaub ntawv uas tuaj yeem tsim kom muaj ntau yam khoom los ntawm kev tswj cov microstructure. Nodular cam khwb cia hlau tau txais nodular graphite los ntawm spheroidization thiab inoculation kev kho mob, uas zoo txhim kho cov neeg kho tshuab zog ntawm cov cam khwb cia hlau, tshwj xeeb tshaj yog cov yas thiab toughness, thiaj li yuav tau txais lub zog siab dua carbon steel. Nodular cam khwb cia hlau yog cov khoom muaj zog cam khwb cia hlau. Nws cov khoom siv dav dav yog ze rau cov hlau. Raws li nws cov khoom zoo heev, cov hlau nplaum tau siv tau zoo rau cov khoom pov thawj ntawm cov quab yuam, lub zog, toughness thiab hnav tsis kam. Nodular cam khwb cia hlau tau tsim sai sai rau hauv cov khoom siv hlau cam thib ob nkaus xwb rau grey cam khwb cia hlau thiab dav siv. Lub npe hu ua "hloov hlau rau cov hlau" feem ntau yog hais txog cov hlau nplaum. Cov hlau ductile feem ntau yog siv los tsim cov khoom siv rau crankshafts thiab camshafts rau tsheb, tsheb laij teb, thiab cov tshuab hluav taws xob sab hauv, nrog rau nruab nrab-siab li qub rau cov tshuab dav dav.
Lub ntsiab txhais yam ntxwv ntawm ductile cam khwb cia hlau yog cov duab ntawm graphite. Hauv cov hlau nplaum, cov graphite yog nyob rau hauv daim ntawv ntawm nodules es tsis yog flakes li nws yog nyob rau hauv grey hlau. Lub ntsej muag zoo nkauj ntawm cov flakes ntawm graphite tsim cov ntsiab lus kev ntxhov siab nyob rau hauv cov hlau matrix thiab cov duab sib npaug ntawm cov nodules tsawg dua, yog li inhibiting kev tsim cov kab nrib pleb thiab muab cov ductility zoo dua uas muab cov hlau nws lub npe. Qhov tsim ntawm nodules yog ua tiav los ntawm kev sib ntxiv ntawm cov ntsiab lus nodulizing, feem ntau yog magnesium (nco ntsoov magnesium boils ntawm 1100 ° C thiab hlau melts ntawm 1500 ° C) thiab, tsis tshua muaj tam sim no, cerium (feem ntau nyob rau hauv daim ntawv ntawm Mischmetal). Tellurium kuj tau siv. Yttrium, feem ntau yog ib feem ntawm Misch hlau, kuj tau kawm raws li qhov ua tau nodulizer.
| Mechanical Properties of Ductile (Nodular) Hlau | ||||||||
| Cov khoom raws li DIN EN 1563 | Ntsuas ntsuas | 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 |
| TS EN JS 1015 | TS EN JS 1025 | TS EN JS 1020 | TS EN JS 1050 | TS EN JS 1060 | TS EN JS 1070 | TS EN JS 1080 | ||
| Tensile zog | Rm min.MPA | 350 | 400 | 400 | 500 | 600 | 700 | 800 |
| 2% Yield zog | Rp 0.2 min.MPA | 220 | 240 | 250 | 320 | 370 | 420 2) | 480 2) |
| Elongation | A% | 22,0 ib | 18,0 ib | 18,0 ib | 7,0 ua | 3,0 ib | 2,0 ib | 2,0 ib |
| Hardness | HB | 110-150 : kuv | 120-160 : kuv | 140-190 : kuv | 170-220 : kuv | 200-250 | 230-280 : kuv | 250-330 Nws |
| Cov qauv | feem ntau yog ferritic | feem ntau yog ferritic | feem ntau yog ferritic | ferritic + pearlite | ferritic + pearlite | feem ntau pearlite | tag nrho pearlite | |
| ISO-V cuam tshuam los ntawm -40 ± 2 ºC | 12,0 ib | |||||||
| ISO-V cuam tshuam los ntawm -20 ± 2 ºC | 12,0 ib | |||||||
| ISO-V cuam tshuam kev ntsuas los ntawm +23 ± 5 ºC | Kv min J | 17,03 Nws.) | 14,03.) | |||||
| Shear Stress | σaB MPa | 315 | 360 | 360 | 450 | 540 | 630 | 7 20 |
| Torsion | TWB MPa | 315 | 360 | 360 | 450 | 540 | 630 | 7 20 |
| Module ntawm elasticity | E GPa | 170 | 170 | 170 | 175 | 175 | 175 | 175 |
| Poisson naj npawb | v - | 0,280 ib | 0,280 ib | 0,280 ib | 0,280 ib | 0,280 ib | 0,280 ib | 0,280 ib |
| Compressive zog | σdB MPa | - | 700 | 700 | 800 | 870 ib | 1000 | 1150 |
| Frature Toughness | Klc MPa · √m | 31 | 30 | 30 | 25 | 20 | 15 | 14 |
| Qhov ntom | g/cm3 | 7,1 ib | 7,1 ib | 7,1 ib | 7,1 ib | 7,2 ib | 7,2 ib | 7,2 ib |
Xuab zeb Mould Casting Foundry hauv Suav teb
Post lub sij hawm: Mar-18-2021