Welding of Q345R and 15CrMo
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There are extra Q345R and 15CrMo steel plates in the workshop. The equipment is used to make saddles; what considerations should be taken into account when welding, and what welding materials should be used?
There’s no NBT47015. I’m not very familiar with welding; this welding engineer definitely knows about it
NBT47015, page 103: TIG welding uses ER50-6 electrodes; SMAW welding uses J506 and J507 electrodes. Submerged arc welding employs HJ431 flux together with H10Mn2 wire
Find a file. Take a look; there’s something you want.
Since there is such excess steel plate in the workshop, a welding assessment must have been conducted earlier.
It’s a small factory with a rather informal system; when people leave, the relevant documents and records can’t be found.
It’s better to avoid using 15CrMo; after preheating and heating, it can crack severely. For welding Q345R, ordinary J427/507 electrodes work just fine, and no problems will arise.
If the material of the component supported by the saddle is not 15CrMo, then do not use 15CrMo for the saddle; there will be too many problems after welding.
15CrMo requires heat treatment after welding.