What's the website ? Googling aus-forming gets confusing when looking for a definition !
However when I look at a metallurgy book a proper definition of ausforging is seen. Bring the steel above the critical then cool to between the pearlite nose and the Ms .While in this area the steel is worked then quenched and tempered. This area is also where you can straighten a blade without problems.
The proper term ausforming and there you will get a better definition such as http://steel.keytometals.com/Articles/Art108.htm -
For the real techies out there - http://www.jim.or.jp/journal/e/pdf3/5/01/47.pdf The point of the process is to increase strength while maintaining good toughness.