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[Metal Material Function Master Practical] 39th Solution
- Writing language: Korean
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Base country: South Korea
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- Education
0000-00-00 00:00:00
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Summarized by durumis AI
- It explains various terms and concepts related to metal materials and heat treatment, such as Rockwell hardness test, surface finish, tempering, preventing quenching cracks, impurities in steel, temper brittleness, types of stainless steel, burnout, mass effect and hardenability, sorbite, sulfur printing method, free-cutting steel, etc.
- In particular, it presents practical solutions for preventing temper brittleness occurring at 400-500 degrees Celsius, the influence of manganese (Mn), and methods for removing free carbon from modification furnaces or carburizing furnaces.
- This article provides useful information that can help you understand the basics of metal materials and solve problems that may occur in actual industrial sites.
1. What are the reference load (a) kg and the test load (b) kg for the C hardness test in the Rockwell hardness test?
2. Write the surface index.
3. Definition and purpose of tempering
4. Two measures to prevent tempering cracks
5. Five major elements in steel other than Fe and four effects of Mn (manganese)
6. Five measures to prevent temper embrittlement when it occurs at 400~500 degrees
7. Four types of stainless steel
8. The glassy carbon accumulated in the carburizing furnace or the nitriding furnace by soot deteriorates the function of the carburizing furnace or the nitriding furnace, so how to remove it by combustion by periodically introducing a proper amount of air as needed?
- Burn out
9. Explain the mass effect and hardenability
- Sorbite
- Sulphur print method
- Free-cutting steel: It has good machinability and is suitable for high-speed cutting.
