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Heat Treating and Metallurgy Discussion of heat treatment and metallurgy in knife making.

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  #1  
Old 01-02-2005, 10:30 AM
tmickley's Avatar
tmickley tmickley is offline
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Location: North Mankato, MN
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metallurgy test...just for fun....

I?m trying to better learn this stuff so I made this ?test? up for fun. The answers will be posted in few message later in this thread.

1. Carbides precipitate during:
A. the quench
B. the cryo
C. the Temper
D. Just under Non-magnetic temp
E. consumption of extra spicy taco?s on Taco Tuesday

2. Missing the TTT nose refers to:
A. Avoiding pearlite transformation
B. Avoiding Martensite transformation
C. converting to Martensite
D. Both A and C
E. Both B and C
F. None of the above

3. Bainite is
A. Is between Pearlite and Austenite
B. Is between Pearlite and Ferrite
C. Is between Pearlite and Martinsite


4. Generally, to make steel good for a knife:
A. You want to convert Austenite to Martensite
B. You want to convert Martensite to Austenite
C. You want to convert Trootsite to Bainite
D. You want to convert Eutectoid to non-eutectoid
E. Forge only at night, with chicken feet, facing north

5. Generally, steels that are _______ in carbon respond best to cryo
A. higher
B. lower
C. devoid of
D. Face centric

6. A Snap Temper is:
A. A very short temper at approximately half of ?normal? temper temperature
B. A very long temper to minimize shock before regular temper
C. A low temperature, brief temper to stabilize material before cryo

7. Grain size, generally speaking, if:
A. larger, makes the steel tougher
B. smaller, makes the steel tougher
C. uneven in size, but spread around consistently, makes steel tougher
E. Makes a huge difference in the taste of single malt whiskey


8. Generally, in order to be effective, cryo treatment has to:
A. be at least 0F
B. be at least -90F
C. be at least -300F
D. be at least 32F

9. Austenite is:
A. Cubic centeric
B. Face polygonal centric
C. Body tetragonal centric
D. Lattice centric


10. Martensite is:
A. Cubic centeric
B. Face centric
C. Body tetragonal centric
D. Lattice centric

11. The threshold for hyper-eutectoid is:
A. .60%
B. .70%
C. .80%
D. .90%
E. Two Barry Manilow songs in a row on the radio

12. Spheroidizing is:
A. #### tough to remember what it is
B. pooled carbides
C. is largely bainite
D. is largely cementite
E. alloys forming round centric borders during temper

13. If you miss the TTT nose, you get:
A. Troostite
B. Cementite
C. Austenite
D. Martensite
E. Pearlite

14. Generally, tempering range is:
A. 350 to 850F
B. 850 to 1300F
C. 1400 to 1800F

15. Generally, stress relieving (annealing) range is:
A. 350 to 850F
B. 850 to 1300F
C. 1400 to 1800F

16. To spheroid, you must be:
A. Above critical
B. Below critical
C. Above and slow cool

17. When you spheroidize metal, it is:
A. tougher
B. more brittle
C. harder to grind
D. easier to grind
E. make metal marbles

18. Metals have molecules:
True or False.

19. Annealing is the same as Normalizing
True or False

20. Edge packing a blade:
A. Packs the atoms of the steel for better edge holding
B. Refines the grain by increasing grain forming nuclei
C. Raises the hardness of the blade
D. any benefit is erased when the blade is brought to critical temp

21 Chicken feet used during forging:
A. Increase the edge holding of a blade
B. Allow you to face true North
C. Are only allowed during a full moon
D. Give Mark Williams something to snack on
E. Refine the grain, increasing toughness

22. Cryo treatment will lower grain size
True or False?

No one would be happy unless there was a way to grade the score so I?ll make one up.
# correct
20+ metallurgist
15+ heat treater
10+ student

now for the answers...
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The correct answer have a * next to them.
1. Carbides precipitate during:
A. the quench
B. the cryo
*C. the Temper
D. Just under Non-magnetic temp
E. eating extra spicy taco?s

2. Missing the TTT nose refers to:
A. Avoiding pearlite transformation
B. Avoiding Martensite transformation
C. converting to Martensite
*D. Both A and C
E. Both B and C
F. None of the above

3. Bainite is
A. Is between Pearlite and Austenite
B. Is between Pearlite and Ferrite
*C. Is between Pearlite and Martinsite


4. Generally, to make steel good for a knife:
*A. You want to convert Austenite to Martensite
B. You want to convert Martensite to Austenite
C. You want to convert Trootsite to Bainite
D. You want to convert Eutectoid to non-eutectoid
E. Forge only at night, with chicken feet, facing north

5. Generally, steels that are _______ in carbon respond best to cryo
*A. higher
B. lower
C. devoid of
D. Face centric

6. A Snap Temper is:
A. A very short temper at approximately half of ?normal? temper temperature
B. A very long temper to minimize shock before regular temper
*C. A low temperature, brief temper to stabilize material before cryo

7. Grain size, generally speaking, if:
A. larger, makes the steel tougher
*B. smaller, makes the steel tougher
C. uneven in size, but spread around consistently, makes steel tougher
E. Makes a huge difference in the taste of single malt whiskey


8. Generally, in order to be effective, cryo treatment has to:
A. be at least 0F
*B. be at least -90F
C. be at least -300F
D. be at least 32F

9. Austenite is:
*A. Cubic centeric
B. Face polygonal centric
C. Body tetragonal centric
D. Lattice centric


10. Martensite is:
A. Cubic centeric
B. Face centric
*C. Body tetragonal centric
D. Lattice centric

11. The threshold for hyper-eutectoid is:
A. .60%
B. .70%
*C. .80%
D. .90%
E. Two Barry Manilow songs in a row on the radio

12. Spheroidizing is:
A. #### tough to remember what it is
B. pooled carbides
C. is largely bainite
*D. is largely cementite
E. alloys forming round centric borders during temper

13. If you miss the TTT nose, you get:
A. Troostite
B. Cementite
C. Austenite
D. Martensite
*E. Pearlite

14. Generally, tempering range is:
*A. 350 to 850F
B. 850 to 1300F
C. 1400 to 1800F

15. Generally, stress relieving (annealing) range is:
A. 350 to 850F
*B. 850 to 1300F
C. 1400 to 1800F

16. To spheroid, you must be:
A. Above critical
*B. Below critical
C. Above and slow cool

17. When you spheroidize metal, it is:
A. tougher
B. more brittle
C. harder to grind
*D. easier to grind
E. make metal marbles

18. Metals have molecules:
True or *False.

19. Annealing is the same as Normalizing
True or *False

20. Edge packing a blade:
A. Packs the atoms of the steel for better edge holding
B. Refines the grain by increasing grain forming nuclei
C. Raises the hardness of the blade
*D. any benefit is erased when the blade is brought to critical temp

21 Chicken feet used during forging:
A. Increase the edge holding of a blade
B. Allow you to face true North
C. Are only allowed during a full moon
D. Give Mark Williams something to snack on
E. Refine the grain, increasing toughness

22. Cryo treatment will lower grain size
True or *False?

No one would be happy unless there was a way to grade the score so I?ll make one up.
# correct
20+ metallurgist
15+ heat treater
10+ student
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  #2  
Old 01-02-2005, 12:35 PM
Quenchcrack Quenchcrack is offline
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The Test

Tracey, A lot of tongue in cheek humor but an excellent summary of many previous posts. Nice job.


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  #3  
Old 01-02-2005, 03:26 PM
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McAhron McAhron is offline
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I passed so what do i get?


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  #4  
Old 01-03-2005, 11:45 AM
villainvomit villainvomit is offline
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Join Date: Jul 2004
Location: Marietta GA
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To tabulate my final score I respectfully ask for the answer to #21.

I choose all of the above.

Thx Tmickley,

VV
Clark
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  #5  
Old 01-03-2005, 11:56 AM
Quenchcrack Quenchcrack is offline
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The test

The answer to #21 is classified information and known only to graduate metallurgists. We could tell you but then we would have to deep fry you.


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  #6  
Old 01-03-2005, 01:04 PM
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tmickley tmickley is offline
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Location: North Mankato, MN
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Quote:
Originally Posted by Quenchcrack
The answer to #21 is classified information and known only to graduate metallurgists. We could tell you but then we would have to deep fry you.
---xactly.. otherwise the answer is D and you'd have to know Mark (gouge) to understand that.
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  #7  
Old 01-09-2005, 07:56 PM
Fsawyer Fsawyer is offline
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Hey.. I like chicken feet in oyster sauce.. you can get that at any GOOD Chinese resteraunt.


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