Dandong Foundry
About Us Casting Products Casting Workshop Machining Workshop Inspection Certificate Blog Articles Contact Us
 

Cast Steel Defects of Sand Casting

Steel castings made by sand casting process always have some casting defects, such as shrinkage, sand inclusion, blowhole, porosity and cracks etc.

In China, most of steel foundries, including Dandong Foundry, produce steel castings by manual method, and the cast sand needs better air permeability, and moreover, cast steel has larger shrink rate than cast iron. These factors cause cast steel has more defects.

Cast steel shrinkage, porosity

Shrinkage normally happens at the positions of gating system. Mainly because the hot liquid steel cools too quick, there is no enough steel water to compensate the shrink areas. Shrinkage have some different types, large shrinkage looks like irregular air holes, small shrinkage has many small pin holes, so this kind of shrinkage is also called as porosity.

Cast steel sand inclusion, sand hole

Sand inclusion is also very common defect. Sand grain easily fall off because of the flush of hot liquid steel during pouring process.

Cast steel blowhole

Cast steel materials have some steel scraps, which has some aluminum components, so after chemical reaction, the generated gas will be held on the surfaces or inside.

Cast steel crack

There are some different types of cracks, such as cold cracking, hot cracking, shrinkage crack, craze cracks, and heat treatment cracks. Cracks are fatal defects for steel castings, because they could seriously reduce the tensile strength of cast steel.

The above cast steel defects on the surfaces of castings could be repaired by electric welding and cast steel repairing adhesive if they do not affect the application. The inside defects could be inspected by NDT testing methods, such as ultrasonic testing (UT) or magnetic particle test. However, the inside defects almost can not be repaired.

For more metal casting defects and pictures, please refer to "Metal Casting Defects".

Home | More Articles

    Main Casting Products

Stove Burner
Cast Iron Plate
Manhole Cover Casting
Brake Drum
Warping Head Casting
Ductile Iron Belt Pulley
Cast Iron Flywheel
Boiler Ash Door
Cast Iron Stove Grate
Tractor Gearbox
Pump Body
Cast Iron Brackets
Cast Iron Weight
Gear Casting
Large Cast Steel Bracket
Cast Iron Drainage Pipe
Flange Castings
Cast Iron Pipe Fittings
Burner Grates for Gas Stove
Grey Iron Counter Weight
Cast Iron Axle Support
Cast Iron Blocks
Gas Burner
Cast Iron Truck Castings
Cast Iron Tractor Parts
Cast Iron Stove Parts
Pump Shell and Valve Body
Cast Iron Umbrella Base

   © DANDONG FUDING ENGINEERING MACHINERY CO., LTD. All Rights Reserved.
  
SITEMAP | Iron Foundry, Automatic Molding, Green Sand Casting, Resin Sand Casting, Shell Molding, Iron Castings, Steel Castings, Gray Iron Casting, Ductile Iron Casting, Cast Iron Price