welding 0-1

[BrokenBiker]

will welding 0-1 tool steel affect its ability to harden?

if welded when its annealed, will it have to be re-annealed before being worked?

its an odd one, but my mrs uncle wants an odd shaped cutting edge and the quickest way i cna see of doing it is welding 2 bits of 0-1 together, grinding the cutting edge on then hardening and tempering.

not going to be worth it if the welding process will affect the ability to harden/ temper though

 

[dan.taylor.1]

I don't know for sure but I doubt it'll weld with normal mild consumables. Maybe stainless or dissimilar? I'd imagine it'll need re annealing then tempering.

 

[BrokenBiker]

I don't know for sure but I doubt it'll weld with normal mild consumables. Maybe stainless or dissimilar? I'd imagine it'll need re annealing then tempering.

I have 309 mma rods I can use...

My plan was to anneal it, weld it, anneal it again, cut the edge, harden, temper then sharpen up

 

[Freddy0309]

Not entirely sure what set up your going for but could you not cut a chunk out, drill, tap and use grub screw?

 

[TechnicAl]

Ive copied this for you


The machinability of O1 steels is very good with a rating of 90% that of water hardening low alloy steels.

O1 steels can be easily formed in the annealed condition using conventional methods.

O1 steels should be heated uniformly to 780-820°C (1436-1508°F) until completely heated through. If needed, the steels can be preheated at 300-500°C (572-932°F). About 30 min/per 25 mm of ruling section is to be provided and then the steels should be immediately quenched in oil.

O1 steels are weldable but run the risk of crack formation but this can be avoided with certain specifications.

• During welding of soft annealed O1 tool steel, the steel should be preheated to 300 - 500°C (572-932°F), welded at same temperature and finally the stress should be relieved immediately. The Cr-Mo alloy electrode is preferable for welding structural steel.
• While welding in order to harden soft annealed O1 tool steel, the steel should be heated to hardening temperature, cooled to 500°C (932°F) and welded at same temperature. Finally quenching is performed. The hard-facing electrode is the preferable choice of electrode.
• When repair welding of the O1 tool steel in hardened and tempered condition, the steel should be preheated to a minimum tempering temperature of 200°C (93°F) and welded at the same tempering temperature. Finally, it should be heated immediately to a maximum tempering temperature of 300°C (572°F) and soaked for 2 hours. The hard-facing electrode is the preferable choice of electrode.

The heat treatment requires O1 steels to be slowly preheated to 649°C (1200°F) and then heated at 788-816°C (1450-1500°F). Then these steels should be held at the same temperature for 10 to 30 minutes and finally oil quenched.

Forging of O1 steels can be performed at 1038°C (1900°F) down to 857°C (1575°F) but not below 816°C (1550°F).

O1 steels can be easily cold-worked in the annealed condition using conventional methods.

Annealing should be performed at 788°C (1450°F) followed by slow furnace cool at a temperature less than 4°C (40°F) per hour.

Tempering of O1 steels is performed at 177-260°C (350-500°F) to realize Rockwell C hardness of 62 to 57.

Martempering is a substitute hardening procedure which can be used along with suitable salt bath equipment.

O1 steels are mainly used for short run tooling for cold forming dies, blanking dies, and cutting tools operating at ambient temperatur

 

[BrokenBiker]

Thanks al, interesting read

 

[BrokenBiker]

Not entirely sure what set up your going for but could you not cut a chunk out, drill, tap and use grub screw?

Not really...it's for an old hand made machine...no idea what it's for but he wants to restore it and the current blade is a very shallow v with bent ends also...the 0-1 that he has is only 4mm thick and drilling and tapping to get the right shape would be a nightmare without a mill.

I think I will suggest he gets hold of a longer bit of material and use that instead

 

[Freddy0309]

Fair enough was a shot in the dark