Birta cawl, ama birta cawlan, waa nooc ka mid ah birta shubka ah oo leh qaab-dhismeed yar oo garaafeed ah. Waxaa lagu magacaabaa midabka cawl ee jabka uu sameeyo. Birta kabka cawl waxa loo isticmaalaa caadobirta cawlanhalkaas oo qallafsanaanta qaybtu ay ka muhiimsan tahay itaalkeeda, sida matoorka gubashada gudaha ee blocks cylinders, guriyaha bamka, weelka korantada, sanduuqyada korantada, miisaanka miiska iyo shubka qurxinta. Kabka cawlan ee kulaylka sare ee birta iyo awooda madaxa gaarka ah ayaa inta badan laga faa'iideystaa in lagu sameeyo qalabka wax lagu karsado ee birta ah iyo rotors brake disc. Birta kabka cawl (sidoo kale loo yaqaan birta cawlan) waa koox ka mid ah birta shubka ah oo ay ku jiraan noocyo kala duwan oo darajo ah iyadoo loo eegayo tilmaamo kala duwan oo heerar kala duwan ah. Birta kabka cawlan waa nooc ka mid ah daawaha kaarboon-kaarboonka waxayna magaceeda ka heshay "cawlan" xaqiiqda ah in qaybahooda goyntu ay u muuqdaan cawl. Qaab dhismeedka birta ee kabka cawl wuxuu inta badan ka kooban yahay garaafyada flake, matrix birta iyo eutectic xuduudka hadhuudhka. Inta lagu jiro birta cawl, Kaarboonku waxa uu ku jiraa garaafiga flake. Sida mid ka mid ah biraha shubista ee aadka loo isticmaalo, birta cawlan ee shubka ah waxay leedahay faa'iidooyin badan xagga kharashyada, kasbashada iyo machinabliity.
Astaamaha Makaanikada ee Cast Gray Iron | ||||||
| Xooga Jilicsan ee Si gooni ah Tusaalooyinka Biraha Kabka Cawlan | ||||||
| Magacaabista Agabka | HT100 | HT150 | HT200 | HT250 | HT300 | HT350 |
| Qalab u dhigma | GG-10, EN-GJL-100 | GG-15, EN-GJL-150 | GG-20, EN-GJL-200 | GG-25, EN-GJL-250 | GG-30, EN-GJL-300 | GG-35, EN-GJL-350 |
| Xoogga Jilitaanka (MPa) | ≥100 | ≥150 | ≥200 | ≥250 | ≥300 | ≥350 |
Awooda Xoojinta Tusaalaha Kabka Biraha ee Cawlan | ||||||
| Magacaabista Agabka | Dhumucda darbiga jibbaarada (mm) | Xoog Xasilloonida (MPa) ≥ | ||||
| Tusaalaha Baar Dia. (mm) | Tusaalaha Block (mm) | Jilayaasha (Tixraac) | ||||
| φ30 | φ50 | R15 | R25 | |||
| HT150, GG-15, EN-GJL-150 | 20-40 | 130 | / | 120 | / | 120 |
| 40-80 | 115 | 115 | 110 | / | 105 | |
| 80-150 | / | 105 | / | 100 | 90 | |
| 150-300 | / | 100 | / | 90 | 80 | |
| HT200, GG-20, EN-GJL-200 | 20-40 | 180 | / | 170 | / | 165 |
| 40-80 | 160 | 155 | 150 | / | 145 | |
| 80-150 | / | 145 | / | 140 | 130 | |
| 150-300 | / | 135 | / | 130 | 120 | |
| HT250, GG-25, EN-GJL-250 | 20-40 | 220 | / | 210 | / | 205 |
| 40-80 | 200 | 190 | 190 | / | 180 | |
| 80-150 | / | 180 | / | 170 | 165 | |
| 150-300 | / | 165 | / | 160 | 150 | |
| HT300, GG-30, EN-GJL-300 | 20-40 | 260 | / | 250 | / | 245 |
| 40-80 | 235 | 230 | 225 | / | 215 | |
| 80-150 | / | 210 | / | 200 | 195 | |
| 150-300 | / | 195 | / | 185 | 180 | |
| HT350, GG-35, EN-GJL-350 | 20-40 | 300 | / | 290 | / | 285 |
| 40-80 | 270 | 265 | 260 | / | 255 | |
| 80-150 | / | 240 | / | 230 | 225 | |
| 150-300 | / | 215 | / | 210 | 205 | |
| Fiiro gaar ah: Marka dhumucdiisu ay ka badan tahay 300 mm, sifooyinka saxda ah ee farsamada waxaa xaqiijiyay iibiyeyaasha iyo iibsadayaasha. | ||||||
Xoojinta Xoojinta Birta Cawlan ee Dhumucda Darbiga ee Kala Duwan | ||||||
| Dhumucda gidaarka tuurista (mm) | Magacaabista Agabka | |||||
| HT100, GG-1, EN-GJL-100 | HT150, GG-15, EN-GJL-150 | HT200, GG-20, EN-GJL-200 | HT250, GG-25, EN-GJL-250 | HT300, GG-30, EN-GJL-300 | HT350, GG-35, EN-GJL-350 | |
| Xoog Xasilloonida (MPa) ≥ | ||||||
| 2.5-4.0 | 130 | 175 | 220 | / | / | / |
| 4.0-10 | 270 | |||||
| 10-20 | 100 | 145 | 195 | 240 | 290 | 340 |
| 20-30 | 90 | 130 | 170 | 220 | 250 | 290 |
| 30-50 | 80 | 120 | 160 | 200 | 230 | 260 |
Qaybaha shubka birta cawlan
Gawaarida Casriga ah ee Birta Cawlan
Waqtiga boostada: Meey-22-2021