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[Engadget] Detroit DIYer cooks up stronger, lighter steel, shames scientists - Page 5

post #41 of 47
Quote:
Originally Posted by hollowtek View Post
Kudos to you gary cole. It really does make me scratch my head why people haven't figured this out a millenia ago (unless they did but they technology was somehow lost)
perhaps the lacked the methods to heat extremely quickly.
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post #42 of 47
Good for this guy and good for Detroit
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post #43 of 47
Let's hope it won't be buried with money so you can no longer see it.
post #44 of 47
...
Edited by dontpwnmebro - 6/12/11 at 10:42am
post #45 of 47
tempered martensite > bainite
post #46 of 47
This is exciting news! Thanks OP.
    
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post #47 of 47
Quote:
Originally Posted by willis888 View Post
Thanks for taking the time to answer. One of the coolest things about OCN are the industry experts that are generous with their time and information.

So in other words, creating soft steel alloy and then hardening it is less efficient than making the initial alloy hard to begin with?

And the current standard for heat treatment can be applied to large batches of material, where as flashing requires a relatively thin input, meaning that at a small scale flashing might be more efficient, but when processing many tons at once its best to use a slow-cooker?

What about shaping it? Would it be easier to shape a softer steel and then heat treat it, or would the savings still be less than just shaping a hard steel?

Does the heat-induced microstructure deform over time due to stress breaking bonds within the baninite/martinsite, turning those crystals amorphous? Why does that not happen to "expensive grades"?

Correct.
Generally speaking,when you heat treat before the forming process,you create higher stresses in the part than if you'd heat treated after.
The forming processes add their own stresses which may conflict with or undo some of what you did in the heat treatment process.
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