Thruster Parts (Australia)

[spacesailor]

Throw them into a ' bush fire ' when ' cherry red ' throw into creek .

spacesailor

 

 

[Student Pilot]

Been watching too much forged in fire? 😁 That will only make them brittle Spaceman, cold resetting/recurving or low temp tempering (going on a straw or light blue colour) is the answer. 

Edited October 18 by Student Pilot

[onetrack]

Leaf springs are normally heat-treated in the following manner, which produces the toughness needed.

 

They are heated to 780°C, then quenched in an oil bath. A brine bath can also be used, instead of oil - although oil is generally regarded as superior. This process hardens the steel.

 

Then the hardened leaf or leaves are placed in a furnace, and evenly heated to 380°C, and then allowed to cool naturally. This is called "tempering", and it lowers the hardness and toughens the steel.

 

The leaf or leaves need to be restrained in a jig when being hardened and tempered, as they will normally buckle or curl out of the desired shape.

[spacesailor]

True but , what thermometer do the 'amateur's ' use .

Old school metallurgists all used the color of the heated metal .

spacesailor

[facthunter]

Cherry red and quench in oil to harden and temper back  to toughen and reduce brittleness. For long thinner items for evenness a nitrate salt bath or a metal alloy that melts at the required temperature. IF you overheat any part of it the Grain of the metal will coarsen and it's ruined for all intents and purposes. If you need to reset the spring subsequently heat that part to the Temper colour. Straw colour on clean steel surface.  For any spring mob who makes leaf springs its a normal thing. A better spring is tapered in thickness as well.  Lighter and spreads the  stress more evenly.  Nev

[Methusala]

I've got a set, they need a bit of work but are genuine, Don 

[wadesworld]

Awesome!! Thanks for the info Team Thruster!!!

Don - I'll give ya a call to discuss.

Thanks