thermal buffering testing

[hsemus]

Hi

what is thermal buffering in forging material HT process.,

is there any standard for using thermal buffering for low carbon high strength alloy materials .

 

[Goahead]

You may wish to see:
SPECIFICATION FOR ALLOY STEEL FORGINGS FOR HIGH-STRENGTH PRESSURE COMPONENT APPLICATION
SA-723/SA-723M
by performing an Internet Search

http://www.welding-advisers.com/

 

[hsemus]

thanks ..

whats the key benefit for doing this, compare to the current QTC testing

 

[OGMetEngr]

Since material receives a better quench (higher cooling rate, better properties) near the surfaces of a part, a thermal buffer allows testing of material that more closely represents through-thickness properties of a forging. API 6A, for example, requires mechanical properties 1/4T (1/4 x thickness) from the exterior surface. The material between the specimen and the exterior of the part would be the "buffer".