sand casting product introduction
Sand casting, also known as sand molded casting, is a metal casting process characterized by using sand as the mold material. The term "sand casting" can also refer to an object produced via the sand casting process. Sand castings are produced in specialized factories called foundries. Over 70% of all metal castings are produced via sand casting process.
There are six steps in this process:
Place a pattern in sand to create a mold.
Incorporate the pattern and sand in a gating system.
Remove the pattern.
Fill the mold cavity with molten metal.
Allow the metal to cool.
Break away the sand mold and remove the casting.
Technical key points
Take effective measures to reduce the casting temperature to eliminate crack defects, at the same time reducing the temperature drop of molten steel to ensure the filling capacity of steel. Main technical measures: one is to directly reduce the casting temperature, the original pouring temperature of 1600 ℃ -1610 ℃, and now strictly control the temperature at 1570℃ -1580 ℃. Second, to reduce the temperature drop of molten steel. After the mold are assembled, blow heat wind 150 ℃ -200 ℃ to the cavities for 60 min-90min, and stop blowing 5min before pouring.
Control the usage rate of recycled material. When melted in the atmosphere, most of the easily oxidized elements in the material are present in the form of inclusions. Therefore, the amount of inclusions to be taken into account and the usage of recycled material must be controlled. for the stainless steel guide vane, the provisions of the return material amount should be not more than 15%.
a.Strict contract auditing involved all departments to assure the feasibility of each order.
b.Process design and validation before bulk production.
c.Strictly control on all raw and auxiliary materials, All raw materials reach the world advanced level.
d.On-site inspection to all processes, inspection record keep traceable for 3 years.
e.All inspectors are skilled with international certificates.
f.Qualified WPS and professional welders guarantee welding quality.
g.100% inspection of finished sprouts before shipment.
h.Advanced and complete testing and inspection equipment: NDT, metal Microscope, impact tester, hardness tester.
i.Regular training for inspection staff.
Wuxi Lingtong Casting Co.,Ltd.
Attn: Ms. Vivian
Tel: +86 510 85990876
Cell: +86 13861777146 18360922650