Are You a Steel Nerd? Quiz

10-11
I only missed the kinetics one too.

I am glad to see in the results post no one answered that an air hardening steel is a "steel so sharp it can divide oxygen molecules" :p
 
That was a fun quiz (I got 11/11).

The secondary hardening response observed in many high-speed steel alloys is due to the precipitation of fine alloy carbides during tempering. In order to accomplish this precipitation process, the alloying elements must be dissolved back into the austenite during the austenitization step. This is one of the reasons why very high austenitizing temperatures are required for these particular grades of steel (M4 is a good example). They are needed to dissolve the Mo-W-V alloy carbides back into solution.
 
ArtReardon said:
That was a fun quiz (I got 11/11).

The secondary hardening response observed in many high-speed steel alloys is due to the precipitation of fine alloy carbides during tempering. In order to accomplish this precipitation process, the alloying elements must be dissolved back into the austenite during the austenitization step. This is one of the reasons why very high austenitizing temperatures are required for these particular grades of steel (M4 is a good example). They are needed to dissolve the Mo-W-V alloy carbides back into solution.
Click to expand...
You can read more about this discovery in my article about the first tool steels: http://knifesteelnerds.com/2018/03/22/the-history-of-the-first-tool-steel/
 
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