What are the common defects in forging?

Common Defects of Steel Forgings

• 1) Unfilled Section: As the name implies in this type of defect some of the forging section remain unfilled.
• 2) Cold Shut: Cold shut includes small cracks at corners.
• 3) Scale Pits:
• 4) Die Shift:
• 5) Flakes:
• 6) Improper Grain Growth:
• 7) Incomplete Forging Penetration:
• 8) Surface Cracking:

What are the advantages and disadvantages of the forging process?

Advantages and Disadvantages:

• Forging gives comparatively tougher product compare to casting.
• The fatigue strength and creep resistance of forge product is higher.
• Forge product has higher mechanical properties.
• Low cost operation.
• This process does not required special skill operator.

Which of the following is limitation of forging?

There are disadvantages of forging process: Higher initial cost for big forging presses. Secondary finishing process required in hot forging. It cannot produce complex shapes. Size is limited due to size of press.

What are the different types of defects in forging?

FORGING DEFECTS The different types of defects, occurring in the forging operations are as follows: 1. Incomplete die filling. 2. Die misalignment. 3. Forging laps. 4. Incomplete forging penetration- should forge on the press.

What are the disadvantages of forging by hand?

Rapid oxidization in forging of a metal surface at high-temperature results in scaling which wears the dies. While performing Forging operation by Hand you must have good energy to strike on the workpiece by the hammer. A huge safety requires because you are working near more than 2000 degrees centigrade.

What’s the best way to forge a knife?

Take the knife out of the forge and place it on the anvil while still holding it with the tongs. While the steel is red-hot and fresh out the forge, get to work with the hammer. You want to knock in all the bulges and gradually pound the knife into the desired shape. Don’t strike the steel too heavily.

What causes hot shortness on steel forging dies?

Hot shortness, due to high sulphur concentration in steel and nickel. 7. Pitted surface, due to oxide scales occurring at high temperature stick on the dies. 8. Buckling, in upsetting forging]