18 Questions
Which process is preferred when the strength of the part is important?
Forging
What is the result of cold working on steel?
An increase in strength and hardness, and a decrease in ductility
What is the primary goal of tempering?
To reduce the residual stresses and increase ductility
What is the result of quenching on the ductility and toughness of the steel?
It reduces ductility and toughness
What is the purpose of the first stage of rolling?
To reduce the size of the ingot to a smaller cross section
What is the primary difference between normalizing and annealing?
The rate of cooling
What is the term for the intermediate shape of the steel when its cross section is square or rectangular?
Bloom
What is the consequence of overworking, whether hot or cold?
Brittleness
What is the result of forging on the grain size of the metal?
It reduces the grain size
What is the purpose of heating to a lower temperature range in tempering?
To produce greater hardness and strength
Why is cold working preferred for certain applications?
Because it results in more accurate finishes and smoother surfaces
What is the purpose of turning the ingot 90° during the second stage of rolling?
To obtain the desired cross section of the final product
What is the primary difference between rolling and extrusion?
The number of operations required to produce the final shape
Which process can produce a product with a cross section of nearly 2 ft?
Extrusion
What is the primary advantage of cold drawing over hot rolling?
All of the above
What is the primary difference between forging and rolling?
The application of pressure or blows to deform the material
What is the primary purpose of forging?
To produce a product with a specific shape or cross-section
What is the common feature of rolling and extrusion?
Both can produce a product with a high-quality surface
This quiz covers the differences between hot working and cold working in steel processing, including the effects on grain structure, strength, hardness, and ductility. Learn about the advantages of cold working, such as smoother surfaces and more accurate finished products. Understand the importance of avoiding overworking in both hot and cold working processes.
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