jordhandson
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- Dorset
A comment from the shrinker stretcher build post got me thinking about hardening steel, not having done any hardening before I decided to give it a go. Before I finish last night I got my gear together, furnace, tongs,
furnace pot,
made sure I had enough gas, gloves, temperature probes, oil for tempering, cloth, items to harden,
fire extinguishers to hand, check sorted.
I did some research last night already for this morning.
First thing this morning I made a tempering oven on the top of my heater out of night storage heater bricks,
then I got the heater lit to see if the oven bricks come up to temperature, then the importance stuff, get the radio on, kettle on for tea have a fag calm me nerves, fire brick oven temperature coming up ok, get a couple hours work done, 9.30 I placed some of the larger bits in the pot I decided to harden in 2 lots bigger bits first, fired up the furnace 15-25 mins furnace temperature up at 800c 10-15mins
later a couple of bits looked a bit darker red than some probably due to different metals so grabbed my magnet, decided to use the magnet test (learnt last night) rather than only temperature,
wow no magnetism that amazing, my routine was out of the furnace, onto the magnet, no magnetism, straight in the oil any hint of magnetism back in the furnace. I gave the parts a good quenching in the oil till there are no bubbles and kept it moving.
part 1
furnace pot,
made sure I had enough gas, gloves, temperature probes, oil for tempering, cloth, items to harden,
fire extinguishers to hand, check sorted.
I did some research last night already for this morning.
First thing this morning I made a tempering oven on the top of my heater out of night storage heater bricks,
then I got the heater lit to see if the oven bricks come up to temperature, then the importance stuff, get the radio on, kettle on for tea have a fag calm me nerves, fire brick oven temperature coming up ok, get a couple hours work done, 9.30 I placed some of the larger bits in the pot I decided to harden in 2 lots bigger bits first, fired up the furnace 15-25 mins furnace temperature up at 800c 10-15mins
later a couple of bits looked a bit darker red than some probably due to different metals so grabbed my magnet, decided to use the magnet test (learnt last night) rather than only temperature,
wow no magnetism that amazing, my routine was out of the furnace, onto the magnet, no magnetism, straight in the oil any hint of magnetism back in the furnace. I gave the parts a good quenching in the oil till there are no bubbles and kept it moving.
part 1