Casting baja paduan yaiku proses pengecoran baja sing dicampur karo pirang-pirang unsur kanthi jumlah total antara 1.0% lan 50% bobot kanggo nambah sifat mekanik. Baja paduan dipérang dadi rong klompok: baja paduan rendah lan baja paduan dhuwur. Paling umum, baja paduan sing digunakake ing casting investasi yaiku baja paduan rendah.
Tegese, saben baja minangka paduan, nanging ora kabeh baja diarani âbaja paduanâ. Baja sing paling gampang yaiku wesi (Fe) sing dicampur karo karbon (C) (kira-kira 0,1% nganti 1%, gumantung saka jinis). Nanging, istilah âbaja paduanâ minangka istilah standar sing ngrujuk marang baja kanthi unsur paduan liyane sing ditambahake kanthi sengaja saliyane karbon. Paduan umum kalebu mangan (sing paling umum), nikel, kromium, molibdenum, vanadium, silikon, lan boron. Paduan sing kurang umum kalebu aluminium, kobalt, tembaga, cerium, niobium, titanium, tungsten, timah, seng, timah, lan zirkonium.
Kanthi casting investasi digawe ing baja campuran, kita bisa entuk akeh sifat kalebu (dibandhingake karo baja karbon): Kekuwatan, atose, kateguhan, nyandhang resistance, resistance karat, lan hardenability. Mesthi wae, perawatan panas bakal mbantu nambah sawetara properti sing luwih apik yen casting investasi ora bisa ketemu langsung.
|
|
C |
Si |
Mn |
Cr |
Mo |
P⤠|
S⤠|
Ni |
|
42CrMo |
0.38-0.45 |
0.17-0.37 |
0.50-0.80 |
0.90-1.20 |
0.15-0.25 |
|
|
|
|
35CrMo |
0.32-0.40 |
0.17-0.37 |
0.40-0.70 |
0.80-1.10 |
0.15-0.25 |
|
|
|
|
40CrNiMo |
0.37-0.44 |
0.17-0.37 |
0.50-0.80 |
0.60-0.90 |
0.15-0.25 |
|
|
1.25-1.65 |
|
4130 |
0.28-0.33 |
0.15-0.35 |
0.40-0.60 |
0.80-1.10 |
0.15-0.25 |
0.035 |
0.04 |
|
|
4140 |
0.38-0.43 |
0.15-0.35 |
0.75-0.10 |
0.80-1.10 |
0.15-0.25 |
0.035 |
0.04 |
|
|
8630 |
0.28-0.33 |
0.15-0.35 |
0.70-0.90 |
0.40-0.60 |
0.15-0.25 |
0.035 |
0.04 |
0.40-0.70 |