Pasir Keramik Sintered kanggo pengecoran karo kothak inti kadhemen
Cara kothak kadhemen nuduhake proses mbentuk wedhi resin sing katalis / hardened dening ndamu ing gas utawa aerosol, lan kawangun langsung ing suhu kamar.Cara sing umum yaiku metode triethylamine, sing nggunakake resin fenolik-urethane lan dikerasake kanthi ngetokake gas trietilamin.Karakteristik proses iki yaiku: wedhi inti bisa digunakake kanggo wektu sing suwe, wektu cetakan cetakan cendhak, efisiensi produksi dhuwur, lan konsumsi energi kurang.
Casting mesin Diesel, kayata blok silinder, kepala silinder, pipa intake lan exhaust, lan liya-liyane, sawetara duwe wangun inti sing kompleks lan area salib sebagean cilik, sing rawan nembak palsu, fraktur, lan liya-liyane, utawa vena katon ing casting amarga expansion gedhe saka wedhi silika.Kemungkinan cacat kayata wedhi lengket lan pori-pori uga relatif dhuwur.
Nggunakake wedhi keramik utawa nyampur wedhi keramik lan wedhi silika kanthi proporsi, jumlah resin sing ditambahake dikurangi 20-30%, lan cacat ing ndhuwur wis saya apik.Ing wektu sing padha, inti wedhi nduweni collapsibility sing apik, sing nyuda beban kerja pembersihan casting.Akibaté, liyane lan liyane mesin diesel casting foundries wis diadopsi teknologi kothak inti kadhemen wedhi Keramik.
Properti Pasir Keramik
| Komponen Kimia Utama | Al₂O₃≥53%, Fe₂O₃＜4%, TiO₂＜3%, SiO₂≤37% |
| Bentuk gandum | Bunder |
| Koefisien Sudut | ≤1.1 |
| Ukuran Partikel | 45μm -2000μm |
| Refractoriness | ≥1800 ℃ |
| Akeh Kapadhetan | 1,5-1,6 g/cm3 |
| Ekspansi Termal (RT-1200 ℃) | 4.5-6.5x10-6/k |
| warna | pasir |
| PH | 6.6-7.3 |
| Komposisi Mineral | Mullite + Corundum |
| Biaya Asam | <1 ml/50 g |
| LOI | <0,1% |
Dibandhingake karo asil tes wedhi mentah liyane saka proses kothak Dingin
| Pasir Mentahan | Resin Tambah. | 2h Kekuwatan Tarik | Evolusi Gas |
| Pasir Keramik Sintered | 1,5% | 2,098 MPa | 10,34 ml/g |
| Pasir Digosok | 1,5% | 1,105 MPa | 13,4 ml/g |
| Pasir Bakar | 1,5% | 1,088 MPa | 12,9 ml/g |
| Pasir Keramik Sintered + Pasir Scrubbed | 1,5% | 1,815 MPa | 12,5 ml/g |
| Pasir Keramik Sinter + Pasir Bakar | 1,5% | 1,851 MPa | 12,35 ml/g |
| Pasir Kromit + Pasir Gosok | 1,5% | 0,801 MPa | 10,85 ml/g |
| Pasir Kromit + Pasir Bakar | 1,5% | 0,821 MPa | 10,74 ml/g |
Dibandhingake karo Castings tingkat cacat proses kothak Cold
| Pasir Mentahan | vena | Inti Rusak | Sinter | keselak | Total |
| Pasir Keramik Sintered | 0% | 2% | 0% | 0 | 2% |
| Pasir Digosok | 28% | 12% | 4% | 3% | 47% |
| Pasir Bakar | 24% | 10% | 3% | 2% | 39% |
| Pasir Keramik Sintered + Pasir Scrubbed | 12% | 4% | 1% | 2% | 19% |
| Pasir Keramik Sinter + Pasir Bakar | 7% | 3% | 2% | 2% | 14% |
| Pasir Kromit + Pasir Gosok | 13% | 6% | 5% | 4% | 28% |
| Pasir Kromit + Pasir Bakar | 12% | 4% | 2% | 2% | 20% |
Bagéyan saka Distribusi ukuran partikel
Distribusi ukuran partikel bisa disesuaikan miturut kabutuhan sampeyan.
| bolong | 20 | 30 | 40 | 50 | 70 | 100 | 140 | 200 | 270 | Pan | AFS | |
| μm | 850 | 600 | 425 | 300 | 212 | 150 | 106 | 75 | 53 | Pan | ||
| Kode | 40/70 | ≤5 | 20-30 | 40-50 | 15-25 | ≤8 | ≤1 | 43±3 | ||||
| 70/40 | ≤5 | 15-25 | 40-50 | 20-30 | ≤10 | ≤2 | 46±3 | |||||
| 50/100 | ≤5 | 25-35 | 35-50 | 15-25 | ≤6 | ≤1 | 50±3 | |||||
| 100/50 | ≤5 | 15-25 | 35-50 | 25-35 | ≤10 | ≤1 | 55±3 | |||||
| 70/140 | ≤5 | 25-35 | 35-50 | 8-15 | ≤5 | ≤1 | 65±4 | |||||
| 140/70 | ≤5 | 15-35 | 35-50 | 20-25 | ≤8 | ≤2 | 70±5 | |||||
| 100/200 | ≤10 | 20-35 | 35-50 | 15-20 | ≤10 | ≤2 | 110±5 | |||||
