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Posted by Robin S. on June 2, 2008, 9:21 pm
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I have a need to make 2"x1" steel blanks, .020-.030" thick. The
problem is that they need to be very resistant to taking a bend, so I
need to increase their strength. Additionally, one edge (1" long) will
need to be hardened as it will be a cutting edge.
I could likely harden the blanks using heat treatment, but this is a
PITA at the best of times due to warping issues. Flatness is
important. I will likely heat treat the edge to get a good cutting
edge.
I'm considering rolling thicker stock down to achieve increased
strength through work-hardening. This would be done cold, and under
power. I would consider making the rolling mill myself, or purchasing
one if they're available (more time than money these days).
Does anyone have reference material which states the highest possible
strength available through work-hardening of various hardenable
steels, as well as the thickness reduction percentage required to
achieve this state?
I'm thinking of O1, W1 or a four-thousand-series alloy steel.
Additionally, is there reference material available for the forces
required (both torque, and clamping) to reduce thicknesses of
materials at certain hardness? Looking for toolmakers' rules of
thumb.
I've done a lot of shop-floor draw work, but I've never worked with
rolling mills.
Thanks for any thoughts or recommendations. I'll likely poke around in
Machinery's Handbook, but I'm also interested in first-hand
experience.
Regards,
Robin
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Posted by Flash on June 2, 2008, 9:35 pm
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Try induction-hardening for the edge?
Flash
>I have a need to make 2"x1" steel blanks, .020-.030" thick. The
> problem is that they need to be very resistant to taking a bend, so I
> need to increase their strength. Additionally, one edge (1" long) will
> need to be hardened as it will be a cutting edge.
>
> I could likely harden the blanks using heat treatment, but this is a
> PITA at the best of times due to warping issues. Flatness is
> important. I will likely heat treat the edge to get a good cutting
> edge.
>
> I'm considering rolling thicker stock down to achieve increased
> strength through work-hardening. This would be done cold, and under
> power. I would consider making the rolling mill myself, or purchasing
> one if they're available (more time than money these days).
>
> Does anyone have reference material which states the highest possible
> strength available through work-hardening of various hardenable
> steels, as well as the thickness reduction percentage required to
> achieve this state?
>
> I'm thinking of O1, W1 or a four-thousand-series alloy steel.
>
> Additionally, is there reference material available for the forces
> required (both torque, and clamping) to reduce thicknesses of
> materials at certain hardness? Looking for toolmakers' rules of
> thumb.
>
> I've done a lot of shop-floor draw work, but I've never worked with
> rolling mills.
>
> Thanks for any thoughts or recommendations. I'll likely poke around in
> Machinery's Handbook, but I'm also interested in first-hand
> experience.
>
> Regards,
>
> Robin
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Posted by BottleBob on June 2, 2008, 10:18 pm
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Robin S. wrote:
> I have a need to make 2"x1" steel blanks, .020-.030" thick. The
> problem is that they need to be very resistant to taking a bend, so I
> need to increase their strength. Additionally, one edge (1" long) will
> need to be hardened as it will be a cutting edge.
>
> I could likely harden the blanks using heat treatment, but this is a
> PITA at the best of times due to warping issues. Flatness is
> important. I will likely heat treat the edge to get a good cutting
> edge.
>
> I'm considering rolling thicker stock down to achieve increased
> strength through work-hardening. This would be done cold, and under
> power. I would consider making the rolling mill myself, or purchasing
> one if they're available (more time than money these days).
>
> Does anyone have reference material which states the highest possible
> strength available through work-hardening of various hardenable
> steels, as well as the thickness reduction percentage required to
> achieve this state?
>
> I'm thinking of O1, W1 or a four-thousand-series alloy steel.
>
> Additionally, is there reference material available for the forces
> required (both torque, and clamping) to reduce thicknesses of
> materials at certain hardness? Looking for toolmakers' rules of
> thumb.
>
> I've done a lot of shop-floor draw work, but I've never worked with
> rolling mills.
>
> Thanks for any thoughts or recommendations. I'll likely poke around in
> Machinery's Handbook, but I'm also interested in first-hand
> experience.
Robin:
You can buy A-2, D-2, 0-1, etc., sheet stock in .030 thickness. Saw
out your parts, machine the edges, have it heat treated. A-2 doesn't
move much on heat treatment.
What you suggest might very well work, but beyond the learning
experience, why go to the expense and trouble?
--
BottleBob
http://home.earthlink.net/~bottlbob
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Posted by GarlicDude on June 2, 2008, 11:37 pm
Please log in for more thread options BottleBob wrote:
>
>
> Robin S. wrote:
>> I have a need to make 2"x1" steel blanks, .020-.030" thick. The
>> problem is that they need to be very resistant to taking a bend, so I
>> need to increase their strength. Additionally, one edge (1" long) will
>> need to be hardened as it will be a cutting edge.
>>
>> I could likely harden the blanks using heat treatment, but this is a
>> PITA at the best of times due to warping issues. Flatness is
>> important. I will likely heat treat the edge to get a good cutting
>> edge.
>>
>> I'm considering rolling thicker stock down to achieve increased
>> strength through work-hardening. This would be done cold, and under
>> power. I would consider making the rolling mill myself, or purchasing
>> one if they're available (more time than money these days).
>>
>> Does anyone have reference material which states the highest possible
>> strength available through work-hardening of various hardenable
>> steels, as well as the thickness reduction percentage required to
>> achieve this state?
>>
>> I'm thinking of O1, W1 or a four-thousand-series alloy steel.
>>
>> Additionally, is there reference material available for the forces
>> required (both torque, and clamping) to reduce thicknesses of
>> materials at certain hardness? Looking for toolmakers' rules of
>> thumb.
>>
>> I've done a lot of shop-floor draw work, but I've never worked with
>> rolling mills.
>>
>> Thanks for any thoughts or recommendations. I'll likely poke around in
>> Machinery's Handbook, but I'm also interested in first-hand
>> experience.
>
> Robin:
>
> You can buy A-2, D-2, 0-1, etc., sheet stock in .030 thickness. Saw
> out your parts, machine the edges, have it heat treated. A-2 doesn't
> move much on heat treatment.
> What you suggest might very well work, but beyond the learning
> experience, why go to the expense and trouble?
>
Bob, Nice to see a post from you. Robin is Canadian, he likes to
struggle. :)
Robin, I concur with Bob. If flatness is an issue you can get it heat
treated between plates.
Best to you both,
Steve
--
Regards,
Steve Saling
aka The Garlic Dude ©
Gilroy, CA
The Garlic Capital of The World
http://tinyurl.com/2avg58
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Posted by on June 3, 2008, 12:11 am
Please log in for more thread options >
> Robin, I concur with Bob. =A0If flatness is an issue you can get it heat
> treated between plates.
I thought about that originally. Wasn't sure if that would do anything
for the flatness (potato chip once the plates open). Have you seen
this work? Neat idea for sure.
Regards,
Robin
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> problem is that they need to be very resistant to taking a bend, so I
> need to increase their strength. Additionally, one edge (1" long) will
> need to be hardened as it will be a cutting edge.
>
> I could likely harden the blanks using heat treatment, but this is a
> PITA at the best of times due to warping issues. Flatness is
> important. I will likely heat treat the edge to get a good cutting
> edge.
>
> I'm considering rolling thicker stock down to achieve increased
> strength through work-hardening. This would be done cold, and under
> power. I would consider making the rolling mill myself, or purchasing
> one if they're available (more time than money these days).
>
> Does anyone have reference material which states the highest possible
> strength available through work-hardening of various hardenable
> steels, as well as the thickness reduction percentage required to
> achieve this state?
>
> I'm thinking of O1, W1 or a four-thousand-series alloy steel.
>
> Additionally, is there reference material available for the forces
> required (both torque, and clamping) to reduce thicknesses of
> materials at certain hardness? Looking for toolmakers' rules of
> thumb.
>
> I've done a lot of shop-floor draw work, but I've never worked with
> rolling mills.
>
> Thanks for any thoughts or recommendations. I'll likely poke around in
> Machinery's Handbook, but I'm also interested in first-hand
> experience.
>
> Regards,
>
> Robin