Steels alloy sedeng jeung low mangrupakeun grup badag tina steels alloy kalawan elemen alloying (utamana unsur kimia kayaning silikon, mangan, kromium, molybdenum, nikel, tambaga jeung vanadium) eusi kirang ti 8%. Castings baja alloy sedeng jeung low boga hardenability alus, sarta sipat mékanis komprehensif alus bisa didapet sanggeus perlakuan panas ditangtoskeun.
Spésifikasi perlakuan panas of Low jeung Medium alloy Steel Castings
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| Kelas | Kategori baja | Spésifikasi perlakuan panas | |||
| Métode Perlakuan | Suhu / ℃ | Métode Cooling | Teu karasa / HBW | ||
| ZG16Mn | Mangan Steel | Normalisasi | 900 | Cooling dina hawa | / |
| Tempering | 600 | ||||
| ZG22Mn | Mangan Steel | Normalisasi | 880 - 900 | Cooling dina hawa | 155 |
| Tempering | 680 - 700 | ||||
| ZG25Mn | Mangan Steel | Annealing atanapi Tempering | / | / | 155 - 170 |
| ZG25Mn2 | Mangan Steel | 200 - 250 | |||
| ZG30Mn | Mangan Steel | 160 - 170 | |||
| ZG35Mn | Mangan Steel | Normalisasi | 850 - 860 | Cooling dina hawa | / |
| Tempering | 560 - 600 | ||||
| ZG40Mn | Mangan Steel | Normalisasi | 850 - 860 | Cooling dina hawa | 163 |
| Tempering | 550 - 600 | Cooling dina tungku | |||
| ZG40Mn2 | Mangan Steel | Anil | 870 - 890 | Cooling dina tungku | 187 - 255 |
| Ngeureunkeun | 830 - 850 | Cooling dina minyak | |||
| Tempering | 350 - 450 | Cooling dina hawa | |||
| ZG45Mn | Mangan Steel | Normalisasi | 840 - 860 | Cooling dina hawa | 196 - 235 |
| Tempering | 550 - 600 | Cooling dina tungku | |||
| ZG45Mn2 | Mangan Steel | Normalisasi | 840 - 860 | Cooling dina hawa | ≥ 179 |
| Tempering | 550 - 600 | Cooling dina tungku | |||
| ZG50Mn | Mangan Steel | Normalisasi | 860 - 880 | Cooling dina hawa | 180 - 220 |
| Tempering | 570 - 640 | Cooling dina tungku | |||
| ZG50Mn2 | Mangan Steel | Normalisasi | 850 - 880 | Cooling dina hawa | / |
| Tempering | 550 - 650 | Cooling dina tungku | |||
| ZG65Mn | Mangan Steel | Normalisasi | 840 - 860 | / | 187 - 241 |
| Tempering | 600 - 650 | ||||
| ZG20SiMn | Silikon-mangan Steel | Normalisasi | 900 - 920 | Cooling dina hawa | 156 |
| Tempering | 570 - 600 | Cooling dina tungku | |||
| ZG30SiMn | Silikon-mangan Steel | Normalisasi | 870 - 890 | Cooling dina hawa | / |
| Tempering | 570 - 600 | Cooling dina tungku | |||
| Ngeureunkeun | 840 - 880 | Cooling dina minyak / cai | / | ||
| Tempering | 550 - 600 | Cooling dina tungku | |||
| ZG35SiMn | Silikon-mangan Steel | Normalisasi | 860 - 880 | Cooling dina hawa | 163 - 207 |
| Tempering | 550 - 650 | Cooling dina tungku | |||
| Ngeureunkeun | 840 - 860 | Cooling dina minyak | 196 - 255 | ||
| Tempering | 550 - 650 | Cooling dina tungku | |||
| ZG45SiMn | Silikon-mangan Steel | Normalisasi | 860 - 880 | Cooling dina hawa | / |
| Tempering | 520 - 650 | Cooling dina tungku | |||
| ZG20MnMo | Mangan Molybdenum Steel | Normalisasi | 860 - 880 | / | / |
| Tempering | 520 - 680 | ||||
| ZG30CrMnSi | Kromium Mangan Silicon Steel | Normalisasi | 800 - 900 | Cooling dina hawa | 202 |
| Tempering | 400 - 450 | Cooling dina tungku | |||
| ZG35CrMnSi | Kromium Mangan Silicon Steel | Normalisasi | 800 - 900 | Cooling dina hawa | ≤ 217 |
| Tempering | 400 - 450 | Cooling dina tungku | |||
| Normalisasi | 830 - 860 | Cooling dina hawa | / | ||
| 830 - 860 | Cooling dina minyak | ||||
| Tempering | 520 - 680 | Cooling dina hawa / tungku | |||
| ZG35SiMnMo | Silikon-mangan-molybdenum baja | Normalisasi | 880 - 900 | Cooling dina hawa | / |
| Tempering | 550 - 650 | Cooling dina hawa / tungku | |||
| Ngeureunkeun | 840 - 860 | Cooling dina minyak | / | ||
| Tempering | 550 - 650 | Cooling dina tungku | |||
| ZG30Cr | Baja Chrome | Ngeureunkeun | 840 - 860 | Cooling dina minyak | ≤ 212 |
| Tempering | 540 - 680 | Cooling dina tungku | |||
| ZG40Cr | Baja Chrome | Normalisasi | 860 - 880 | Cooling dina hawa | ≤ 212 |
| Tempering | 520 - 680 | Cooling dina tungku | |||
| Normalisasi | 830 - 860 | Cooling dina hawa | 229 - 321 | ||
| Ngeureunkeun | 830 - 860 | Cooling dina minyak | |||
| Tempering | 525 - 680 | Cooling dina tungku | |||
| ZG50Cr | Baja Chrome | Ngeureunkeun | 825 - 850 | Cooling dina minyak | ≥ 248 |
| Tempering | 540 - 680 | Cooling dina tungku | |||
| ZG70Cr | Baja Chrome | Normalisasi | 840 - 860 | Cooling dina hawa | ≥ 217 |
| Tempering | 630 - 650 | Cooling dina tungku | |||
| ZG35SiMo | Silikon Molybdenum Steel | Normalisasi | 880 - 900 | / | / |
| Tempering | 560 - 580 | ||||
| ZG20Mo | Molybdenum Steel | Normalisasi | 900 - 920 | Cooling dina hawa | 135 |
| Tempering | 600 - 650 | Cooling dina tungku | |||
| ZG20CrMo | baja Chrome-molybdenum | Normalisasi | 880 - 900 | Cooling dina hawa | 135 |
| Tempering | 600 - 650 | Cooling dina tungku | |||
| ZG35CrMo | baja Chrome-molybdenum | Normalisasi | 880 - 900 | Cooling dina hawa | / |
| Tempering | 550 - 600 | Cooling dina tungku | |||
| Ngeureunkeun | 850 | Cooling dina minyak | 217 | ||
| Tempering | 600 | Cooling dina tungku | |||
Karakteristik Perlakuan Panas Sedeng sareng Low Alloy Steel Castings:
1. Sedeng sarta low castings baja alloy lolobana dipaké dina industri mesin kayaning mobil, traktor, karéta, mesin konstruksi, sarta sistem hidrolik. industri ieu merlukeun castings kalawan kakuatan alus tur kateguhan. Pikeun castings merlukeun kakuatan tensile kirang ti 650 MPa, normalizing + tempering perlakuan panas umumna dipaké; pikeun sedeng jeung low castings baja alloy anu merlukeun kakuatan tensile leuwih gede ti 650 MPa, quenching + suhu luhur tempering perlakuan panas dipaké. Saatos quenching na tempering, struktur metalurgi tina casting baja téh sorbite tempered, ku kituna pikeun ménta kakuatan luhur sarta kateguhan alus. Nanging, nalika bentuk sareng ukuran tuang henteu cocog pikeun quenching, normalizing + tempering kedah dianggo tibatan quenching sareng tempering.
2. Éta hadé pikeun ngalakukeun normalizing atanapi normalizing + tempering pretreatment saméméh quenching na tempering of sedeng jeung low castings baja alloy. Ku cara kieu, sisikian kristal tina casting baja bisa refined jeung struktur seragam, kukituna enhancing efek tina quenching final sarta perlakuan tempering, sarta ogé nulungan pikeun nyingkahan épék ngarugikeun tina stress casting jero casting nu.
3. Saatos perlakuan quenching, sedeng jeung low castings baja alloy kedah ménta struktur martensite saloba mungkin. Pikeun ngahontal tujuan ieu, suhu quenching sareng sedeng cooling kedah dipilih dumasar kana kelas baja tuang, hardenability, ketebalan témbok tuang, bentuk sareng faktor sanésna.
4. Dina raraga nyaluyukeun struktur quenching tina baja matak na ngaleungitkeun stress quenching, sedeng jeung low castings baja alloy kudu tempered langsung saatos quenching.
5. Dina premis teu ngurangan kakuatan castings baja, sedeng-karbon low-alloy castings baja-kakuatan tinggi bisa toughened. Perlakuan toughening bisa ningkatkeun plasticity sarta kateguhan tina castings baja.
Suhu jeung karasa baja alloy low sanggeus QT perlakuan panas
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| Low jeung Medium Alloy Steel Kelas | Suhu Quenching / ℃ | Suhu Tempering / ℃ | Teu karasa / 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 |
| ZG34Cr2Ni2Mo | 840 - 860 | 550 -600 | 241 - 341 |
waktos pos: Jul-31-2021