| 摘要 |
<p>A method 100 and apparatus of casting a low alloy steel using apparatus 124 is disclosed. The method 100 includes receiving the mold 124 having foam pattern 104 in casing 118. This foam pattern is coated with a permeable refractory coating 112 and is placed within compacted sand inside casing 120. Molten low alloy steel 144 having a carbon content in a range from about 0.1 to about 0.4 percent is poured into the mold 124, vaporising the foam pattern 104 and removing gasification products through the permeable refractory coating 112 . This forms a low alloy steel casting 152. Further, the method 100 includes removing casting 152 from the mold 124. The refractory coating might include an inorganic binder with alumina and/or zircon. The coating helps minimise surface defects and gas entrapment.</p> |
