Is there a metallurgical reason for 2 x 1h temper vs just a 2hr temper?

[MM52100]

Does the cycle to RT and back up do anything?

 

[Natlek]

In first temper some of retained austenite will convert to martensite so this new martensite need to be temper

 

[MM52100]

In first temper some of retained austenite will convert to martensite so this new martensite need to be temper

Ah, that makes a lot of sense. Thanks!

 

[Natlek]

Ah, that makes a lot of sense. Thanks!

Knife Steel Nerds - Metallurgy and Testing of Knives and Steel

Articles and original research for knife makers and enthusiasts about steel metallurgy and knife design.

knifesteelnerds.com

 

[Larrin]

A link to an article about tempering rather than the homepage of the website:

What Happens During Tempering of Steel? - Knife Steel Nerds

Thanks to Shawn Houston and Tyler Christian for becoming Knife Steel Nerds Patreon supporters. We have reached our first goal and therefore I will be interviewing Devin Thomas and posting it as an article to the website. In a previous post I wrote about what happens during rapid quenching of...

knifesteelnerds.com

 

[Natlek]

A link to an article about tempering rather than the homepage of the website:

What Happens During Tempering of Steel? - Knife Steel Nerds

Thanks to Shawn Houston and Tyler Christian for becoming Knife Steel Nerds Patreon supporters. We have reached our first goal and therefore I will be interviewing Devin Thomas and posting it as an article to the website. In a previous post I wrote about what happens during rapid quenching of...

knifesteelnerds.com

Before we temper steel we need to know how to harden it , and before that most time we need to do thermal cycling , before that we need to know more about steel we use ............etc
So , start here ................ https://knifesteelnerds.com/