Birta xabka ah, oo sidoo kale loo yaqaan birta nodular ama graphite spheroidal graphite (SG) cast iron, maaha hal shay laakiin waa qayb ka mid ah koox walxo kuwaas oo la soo saari karo si ay u yeeshaan hanti balaadhan oo kala duwan iyada oo loo marayo xakamaynta qaab-dhismeedka yar yar. Birta kabka ah ee nodular waxay ku helaysaa garaafka nodular iyada oo loo marayo spheroidization iyo daaweynta tallaalka, taas oo si wax ku ool ah u wanaajisa sifooyinka farsamada ee birta kabka, gaar ahaan caagagga iyo adkaanta, si loo helo xoog ka sarreeya birta kaarboonka. Birta kabka ah ee nodular waa shay bir ah oo xoog badan. Sifooyinkeeda dhamaystiran waxay ku dhow yihiin birta. Iyada oo ku saleysan sifooyinkeeda ugu fiican, birta ductile ayaa si guul leh loogu isticmaalay tuurista qaybaha xoogga adag, xoogga, adkaanta iyo xirashada caabbinta. Birta kabka nodular ayaa si degdeg ah u horumartay oo noqotay birta shubka labaad oo keliya kabka cawl oo si weyn loo isticmaalo. Waxa loogu yeero "birta beddelka birta" inta badan waxaa loola jeedaa birta ductile. Birta birta ah ayaa inta badan loo isticmaalaa in lagu soo saaro qaybo loogu talagalay shafka iyo kamaradaha baabuurta, cagafyada, iyo matoorada gubashada gudaha, iyo sidoo kale cadaadiska dhexdhexaadka ah ee mishiinka guud.
Sifada guud ee qeexida birta ductile waa qaabka garaafka. In birta ductile, graphite waa qaab nodules halkii ay ka jajabin lahaa sida ay ku jirto birta cawl. Qaabka fiiqan ee garaafyada garaafyada waxay abuuraan dhibco fiirsiyeedka gudaha matrixka birta iyo qaabka wareegsan ee qanjidhada si ka yar, sidaas darteed xannibaya abuurista dildilaaca iyo bixinta ductility la xoojiyay ee siinaya daawaha magaceeda. Samaynta qanjidhada waxaa lagu gaaraa iyada oo lagu daro curiyeyaasha nodulizing, inta badan magnesium (xusuusnow magnesium wuxuu karkariyaa 1100 ° C iyo birta waxay dhalaalisaa 1500 ° C) iyo, marar badan hadda, cerium (sida caadiga ah qaabka Mischmetal). Tellurium ayaa sidoo kale la isticmaalay. Yttrium, inta badan qayb ka mid ah birta Misch, ayaa sidoo kale loo bartay sida nodulizer macquul ah.
| Qalabka Makaanikada ee Birta Ductile (Nodular). | ||||||||
| Shayga sida ku cad DIN EN 1563 | Cutubka Cabbirka | 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 | ||
| Xoogga Jilicsan | Rm min.MPA | 350 | 400 | 400 | 500 | 600 | 700 | 800 |
| 2% Xoogga Wax-soosaarka | Rp0.2 min.MPA | 220 | 240 | 250 | 320 | 370 | 420 2) | 480 2) |
| Dheeraynta | A% | 22,0 | 18,0 | 18,0 | 7,0 | 3,0 | 2,0 | 2,0 |
| Adag | HB | 110-150 | 120-160 | 140-190 | 170-220 | 200-250 | 230-280 | 250-330 |
| Qaab dhismeedka | inta badan ferritic | inta badan ferritic | inta badan ferritic | ferritic + pearlite | ferritic + pearlite | inta badan pearlite | dhammaan pearlite | |
| Imtixaanka saamaynta ISO-V -40 ± 2ºC | 12,0 | |||||||
| Imtixaanka saamaynta ISO-V -20 ± 2ºC | 12,0 | |||||||
| Imtixaanka saamaynta ISO-V ee +23 ± 5ºC | Kv min.J | 17,0 3) | 14,0 3) | |||||
| Cadaadis xiiran | σaB MPa | 315 | 360 | 360 | 450 | 540 | 630 | 720 |
| Torsion | TtB MPa | 315 | 360 | 360 | 450 | 540 | 630 | 720 |
| Modules ee barti | E GPA | 170 | 170 | 170 | 175 | 175 | 175 | 175 |
| Lambarka sunta | v - | 0,280 | 0,280 | 0,280 | 0,280 | 0,280 | 0,280 | 0,280 |
| Xoog isku dhejisan | σdB MPa | - | 700 | 700 | 800 | 870 | 1000 | 1150 |
| Adkaynta jaban | Klc MPa ·√m | 31 | 30 | 30 | 25 | 20 | 15 | 14 |
| Cufnaanta | g/cm3 | 7,1 | 7,1 | 7,1 | 7,1 | 7,2 | 7,2 | 7,2 |
Sanduuqa Casriyeynta Casriga ah ee Shiinaha
Waqtiga boostada: Mar-18-2021