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Consider the following tool materials: 
1. Carbide
2. Cermet
3. Ceramic
4. Borazon.
Correct sequence of these tool materials in increasing order of their ability to retain theirhot hardness is
  • a)
    1,2,3,4
  • b)
    1,2,4,3
  • c)
    2, 1, 3, 4
  • d)
    2, 1, 4, 3
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Consider the following tool materials:1. Carbide2. Cermet3. Ceramic4. ...
Ans. (a)
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Most Upvoted Answer
Consider the following tool materials:1. Carbide2. Cermet3. Ceramic4. ...

Explanation:

Carbide:
- Carbide has a relatively lower ability to retain hot hardness compared to the other materials.
- It may start to lose its hardness at high temperatures, affecting its performance in cutting applications.

Cermet:
- Cermet has a higher ability to retain hot hardness compared to carbide.
- It is a composite material that combines ceramic and metallic elements, providing better heat resistance.

Ceramic:
- Ceramic has an even higher ability to retain hot hardness compared to cermet.
- Ceramic materials can withstand extremely high temperatures without significant loss of hardness.

Borazon:
- Borazon has the highest ability to retain hot hardness among the listed materials.
- It is a superabrasive material that can maintain its hardness even at very high temperatures, making it ideal for demanding cutting applications.

Therefore, the correct sequence of these tool materials in increasing order of their ability to retain hot hardness is 1. Carbide, 2. Cermet, 3. Ceramic, 4. Borazon.
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