I have been always told that if you get proof failure one of the main reasons can be slack quenching.
my questions are:
- is this true?
- what else can be involved?
- can we explain the reasons scinetifically (by dislocation theory or...)?
thank you evryone for your help.
Recently we heat treated some extruded steel(low alloy steel) tubes (hardening, polymer quench and temper) and they cracked in the bore. refractomere and viscometer tests shows that our polymer concentration is in the range. We think it may be due to the aged polymer. but the thing which has...
Hi all,
we are looking for an effective method of billet de-scaling or protecting coating to minimise the scaling of the billets before forging.
our forging temp is normally around 1200C (steel). currently we are using rotary de-scaler which same as the coatings we use is not very efficient...
we have an order for forging some maraging steel and the customer has asked for 3 stages heat treatment. one at nearly 940 one at nearly 790 and one aging op.
am I right to think the first one is some kind of annealing or stress reliving op? as normally they have two stages heat treatment...
