Drains
Yeah, nah.
- Messages
- 7,714
- Location
- Sefton, South Island, NZ
Yowzah.
I've a job on welding En19 (crmo) valve bodies, dia 25mm, min, with a 8mm wide by 3mm deep groove cut. The groove is to be filled with Bohler/UTP A34N aluminium bronze prior to machining flush.
It's a DC tig process with flux (!). We have to select the rod size, and i'm swithering, as I have no info on amps req'd for different rod thicknesses, and minimal heat input is necessary for maximum mech properties. I'm thinking I could go 2.4mm and do each unit in one run, or 1.6mm and do two runs with an interpass cool-down between. Not sure what's best though. The component is not large and will get pretty hot, pretty quick. There's also the option of sitting it in a copper heat-sink.
I'm waiting for Bohler to get back to me, but in the meantime, anyone in the know (Al, have you finished walking the dog/perusing you local art gallery yet - or as it's friday afternoon, put your pint down and get the keyboard out, there's a chap) got any suggestions?
I've a job on welding En19 (crmo) valve bodies, dia 25mm, min, with a 8mm wide by 3mm deep groove cut. The groove is to be filled with Bohler/UTP A34N aluminium bronze prior to machining flush.
It's a DC tig process with flux (!). We have to select the rod size, and i'm swithering, as I have no info on amps req'd for different rod thicknesses, and minimal heat input is necessary for maximum mech properties. I'm thinking I could go 2.4mm and do each unit in one run, or 1.6mm and do two runs with an interpass cool-down between. Not sure what's best though. The component is not large and will get pretty hot, pretty quick. There's also the option of sitting it in a copper heat-sink.
I'm waiting for Bohler to get back to me, but in the meantime, anyone in the know (Al, have you finished walking the dog/perusing you local art gallery yet - or as it's friday afternoon, put your pint down and get the keyboard out, there's a chap) got any suggestions?