heating of harden 1045 steel
heating of harden 1045 steel
(OP)
... I was told that heating a preharden (42HRc) steel rule (1.5" high X 0.083 thick) for bending a bit is worst than heating it throughly (not melting). it has something to do with the fact that the steel becomes harder before it gets softer. now limited experimenting seems to support this notion.
has anyone else heard of this phenomena, and if so what is the proper term for it.
thanks
pete
has anyone else heard of this phenomena, and if so what is the proper term for it.
thanks
pete





RE: heating of harden 1045 steel
RE: heating of harden 1045 steel
I don't have my reference any more so I don't know if 1045 has this problem.
RE: heating of harden 1045 steel
it is called blue brittleness in steel and is caused by "nitrogen atoms in the iron lattice hampering the movement of dislocations".