Tempering XW41 Tool Steel

[123Cat]

Temper for 2 hours, twice
Why so long?
I suppose something happens in the steel ?

Thanks for replies

 

[rockmet]

Due to high alloy content, tool steels are generally very 'slow' reacting during thermal processing. Thus there is a relatively high proportion of retained austenite after hardening, and the double temper helps to convert this weak, soft constituent into hard, useful martensite.

Terry

 

[123Cat]

Thanks Terry
Excellent