About Temper Bead Material AISI 4340
About Temper Bead Material AISI 4340
(OP)
I have material AISI 4340 and need to welding repair becuase it Crack at near weldment depth 10-15 mm
crack after quenching . in my process is welding and then Stress relief and then Quenching and after that Crack !!
base metal 50 mm. fillet weld about 6-8 layer
i need recommand about detail to do WPS
i am a young engineer if who can recommand relly thank you
http://postimg.org/image/62wgsstg9/
http://postimg.org/image/62wgsstg9/
http://s28.postimg.org/9mieilw65/DSCF4837.jpg
http://files.engineering.com/getfile.aspx?folder=7...
crack after quenching . in my process is welding and then Stress relief and then Quenching and after that Crack !!
base metal 50 mm. fillet weld about 6-8 layer
i need recommand about detail to do WPS
i am a young engineer if who can recommand relly thank you
http://postimg.org/image/62wgsstg9/
http://postimg.org/image/62wgsstg9/
http://s28.postimg.org/9mieilw65/DSCF4837.jpg
http://files.engineering.com/getfile.aspx?folder=7...





RE: About Temper Bead Material AISI 4340
RE: About Temper Bead Material AISI 4340
Thermal stress relief +Quenching by oil+tempering
cooling in air
RE: About Temper Bead Material AISI 4340
(1) No re-heat treatment. You can perform the weld repair and post weld heat treat to 20 deg C below the original tempering temperature for the 4340 steel (if it was originally heat treated).
(2) If this is a weld repair prior to final heat treatment, I would perform the weld repair, and go right into heat treatment - austenitize treatment, followed by oil quench and then temper. The weld metal should be a Cr-Mo-Ni alloy to respond similar to heat treatment as the 4340 steel.