Matsakaici da ƙananan ƙarfe baƙin ƙarfe babban rukuni ne na kayan ƙarfe tare da abubuwan haɗaɗɗun abubuwa (musamman abubuwan sinadarai kamar silicon, manganese, chromium, molybdenum, nickel, jan ƙarfe da vanadium) abun ciki na ƙasa da 8%. Matsakaici da ƙananan simintin gyare-gyaren ƙarfe suna da kyakkyawan ƙarfi, kuma ana iya samun ingantaccen kaddarorin inji bayan ingantaccen magani mai zafi.
Ƙayyadaddun Maganin Zafi na Ƙarƙashin Ƙarƙashin Ƙarfe da Matsakaici
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| Daraja | Karfe Category | Bayanan Bayani na Maganin Zafi | |||
| Hanyar Magani | Zazzabi / ℃ | Hanyar sanyaya | Hardness / HBW | ||
| ZG16Mn | Manganese Karfe | Daidaitawa | 900 | Sanyi a cikin iska | / |
| Haushi | 600 | ||||
| ZG22Mn | Manganese Karfe | Daidaitawa | 880-900 | Sanyi a cikin iska | 155 |
| Haushi | 680-700 | ||||
| ZG25Mn | Manganese Karfe | Annealing ko fushi | / | / | 155-170 |
| ZG25Mn2 | Manganese Karfe | 200-250 | |||
| ZG30Mn | Manganese Karfe | 160-170 | |||
| ZG35Mn | Manganese Karfe | Daidaitawa | 850-860 | Sanyi a cikin iska | / |
| Haushi | 560-600 | ||||
| ZG40Mn | Manganese Karfe | Daidaitawa | 850-860 | Sanyi a cikin iska | 163 |
| Haushi | 550-600 | Sanyaya a cikin tanderu | |||
| ZG40Mn2 | Manganese Karfe | Annealing | 870-890 | Sanyaya a cikin tanderu | 187-255 |
| Quenching | 830-850 | Sanyi a cikin mai | |||
| Haushi | 350-450 | Sanyi a cikin iska | |||
| ZG45Mn | Manganese Karfe | Daidaitawa | 840-860 | Sanyi a cikin iska | 196-235 |
| Haushi | 550-600 | Sanyaya a cikin tanderu | |||
| ZG45Mn2 | Manganese Karfe | Daidaitawa | 840-860 | Sanyi a cikin iska | ≥ 179 |
| Haushi | 550-600 | Sanyaya a cikin tanderu | |||
| ZG50Mn | Manganese Karfe | Daidaitawa | 860-880 | Sanyi a cikin iska | 180-220 |
| Haushi | 570-640 | Sanyaya a cikin tanderu | |||
| ZG50Mn2 | Manganese Karfe | Daidaitawa | 850-880 | Sanyi a cikin iska | / |
| Haushi | 550-650 | Sanyaya a cikin tanderu | |||
| ZG65Mn | Manganese Karfe | Daidaitawa | 840-860 | / | 187-241 |
| Haushi | 600-650 | ||||
| ZG20SiMn | Silico-Manganese Karfe | Daidaitawa | 900-920 | Sanyi a cikin iska | 156 |
| Haushi | 570-600 | Sanyaya a cikin tanderu | |||
| ZG30SiMn | Silico-Manganese Karfe | Daidaitawa | 870-890 | Sanyi a cikin iska | / |
| Haushi | 570-600 | Sanyaya a cikin tanderu | |||
| Quenching | 840-880 | Sanyi a cikin mai/ruwa | / | ||
| Haushi | 550-600 | Sanyaya a cikin tanderu | |||
| ZG35SiMn | Silico-Manganese Karfe | Daidaitawa | 860-880 | Sanyi a cikin iska | 163-207 |
| Haushi | 550-650 | Sanyaya a cikin tanderu | |||
| Quenching | 840-860 | Sanyi a cikin mai | 196-255 | ||
| Haushi | 550-650 | Sanyaya a cikin tanderu | |||
| ZG45SiMn | Silico-Manganese Karfe | Daidaitawa | 860-880 | Sanyi a cikin iska | / |
| Haushi | 520-650 | Sanyaya a cikin tanderu | |||
| ZG20MnMo | Manganese Molybdenum Karfe | Daidaitawa | 860-880 | / | / |
| Haushi | 520-680 | ||||
| ZG30CrMnSi | Chromium Manganese Silicon Karfe | Daidaitawa | 800-900 | Sanyi a cikin iska | 202 |
| Haushi | 400-450 | Sanyaya a cikin tanderu | |||
| ZG35CrMnSi | Chromium Manganese Silicon Karfe | Daidaitawa | 800-900 | Sanyi a cikin iska | ≤ 217 |
| Haushi | 400-450 | Sanyaya a cikin tanderu | |||
| Daidaitawa | 830-860 | Sanyi a cikin iska | / | ||
| 830-860 | Sanyi a cikin mai | ||||
| Haushi | 520-680 | Sanyi a cikin iska / tanderu | |||
| ZG35SiMnMo | Silico-manganese-molybdenum karfe | Daidaitawa | 880-900 | Sanyi a cikin iska | / |
| Haushi | 550-650 | Sanyi a cikin iska / tanderu | |||
| Quenching | 840-860 | Sanyi a cikin mai | / | ||
| Haushi | 550-650 | Sanyaya a cikin tanderu | |||
| ZG30Cr | Karfe Chrome | Quenching | 840-860 | Sanyi a cikin mai | ≤ 212 |
| Haushi | 540-680 | Sanyaya a cikin tanderu | |||
| ZG40Cr | Karfe Chrome | Daidaitawa | 860-880 | Sanyi a cikin iska | ≤ 212 |
| Haushi | 520-680 | Sanyaya a cikin tanderu | |||
| Daidaitawa | 830-860 | Sanyi a cikin iska | 229-321 | ||
| Quenching | 830-860 | Sanyi a cikin mai | |||
| Haushi | 525-680 | Sanyaya a cikin tanderu | |||
| ZG50Cr | Karfe Chrome | Quenching | 825-850 | Sanyi a cikin mai | ≥ 248 |
| Haushi | 540-680 | Sanyaya a cikin tanderu | |||
| ZG70Cr | Karfe Chrome | Daidaitawa | 840-860 | Sanyi a cikin iska | ≥ 217 |
| Haushi | 630-650 | Sanyaya a cikin tanderu | |||
| ZG35SiMo | Silicon Molybdenum Karfe | Daidaitawa | 880-900 | / | / |
| Haushi | 560-580 | ||||
| ZG20Mo | Molybdenum Karfe | Daidaitawa | 900-920 | Sanyi a cikin iska | 135 |
| Haushi | 600-650 | Sanyaya a cikin tanderu | |||
| ZG20CrMo | Chrome-molybdenum karfe | Daidaitawa | 880-900 | Sanyi a cikin iska | 135 |
| Haushi | 600-650 | Sanyaya a cikin tanderu | |||
| ZG35CrMo | Chrome-molybdenum karfe | Daidaitawa | 880-900 | Sanyi a cikin iska | / |
| Haushi | 550-600 | Sanyaya a cikin tanderu | |||
| Quenching | 850 | Sanyi a cikin mai | 217 | ||
| Haushi | 600 | Sanyaya a cikin tanderu | |||
Halayen Maganin Zafi na Matsakaici da Ƙarfe Ƙarfe:
1. Matsakaici da ƙananan simintin gyare-gyaren ƙarfe galibi ana amfani da su a cikin masana'antar injuna kamar motoci, tarakta, jiragen ƙasa, injinan gini, da tsarin ruwa. Waɗannan masana'antu suna buƙatar simintin gyare-gyare tare da kyakkyawan ƙarfi da ƙarfi. Don simintin gyare-gyaren da ke buƙatar ƙarfin juzu'i na ƙasa da 650 MPa, ana amfani da normalizing + yanayin zafi gabaɗaya; ga matsakaici da ƙananan gami da simintin gyare-gyaren ƙarfe waɗanda ke buƙatar ƙarfin juzu'i na sama da 650 MPa, ana amfani da quenching + babban zafin jiki mai zafi. Bayan quenching da zafin jiki, tsarin ƙarfe na simintin ƙarfe yana da zafi sorbite, don samun ƙarfi da ƙarfi mai kyau. Duk da haka, lokacin da siffar da girman simintin ba su dace da quenching ba, ya kamata a yi amfani da normalizing + tempering maimakon quenching da tempering.
2. Yana da kyau a yi normalizing ko normalizing + tempering pretreatment kafin quenching da tempering na matsakaici da kuma low gami karfe simintin gyaran kafa. Ta wannan hanyar, za a iya tace ƙwayar kristal na simintin ƙarfe kuma tsarin ya zama daidai, ta haka yana haɓaka tasirin maganin kashewa na ƙarshe da zafin jiki, da kuma taimakawa wajen guje wa illar damuwa na simintin simintin.
3. Bayan maganin kashewa, matsakaici da ƙananan simintin ƙarfe ya kamata su sami tsarin martensite gwargwadon yiwuwa. Domin cimma wannan burin, ya kamata a zaɓi zafin zafin jiki da matsakaicin sanyaya bisa ga simintin ƙarfe na simintin gyare-gyare, ƙarfin ƙarfi, kaurin bango, siffar da sauran abubuwa.
4. Domin daidaita tsarin quenching na simintin ƙarfe da kuma kawar da damuwa na quenching, matsakaici da ƙananan simintin ƙarfe ya kamata a yi zafi nan da nan bayan quenching.
5. A ƙarƙashin yanayin rashin rage ƙarfin simintin ƙarfe, ana iya ƙarfafa simintin ƙarfe na matsakaici-carbon low-alloy high-ƙarfin simintin ƙarfe. Magani mai ƙarfi na iya inganta filastik da taurin simintin ƙarfe.
Zazzabi da Taurin Ƙarfe Ƙarfe bayan Jiyya na QT
| |||
| Karan da Matsakaici Alloy Karfe Grade | Zazzabi / ℃ | Zazzabi / ℃ | Hardness / HBW |
| ZG40Mn2 | 830-850 | 530-600 | 269-302 |
| ZG35Mn | 870-890 | 580-600 | ≥ 195 |
| ZG35SiMnMo | 880-920 | 550-650 | / |
| ZG40Cr1 | 830-850 | 520-680 | / |
| ZG35Cr1Mo | 850-880 | 590-610 | / |
| ZG42Cr1Mo | 850-860 | 550-600 | 200-250 |
| ZG50Cr1Mo | 830-860 | 540-680 | 200-270 |
| ZG30CrNiMo | 860-870 | 600-650 | ≥ 220 |
| Saukewa: ZG34Cr2Ni2Mo | 840-860 | 550-600 | 241-341 |
Lokacin aikawa: Yuli-31-2021