induction hardening
induction hardening
(OP)
Hello,
I had done hardeness analysis of a HF induction harden cutting blade (1045 steel) which shows a heat effected zone (HAF) about 0.7mm from cutting tip at ~ 32HRc to about 1.0mm, while tip hardness is ~ 52 HRc and body hardness is 44 HRc.
I was under the impression that HAF is not generated by HF induction hardening? Am I correct???
Thanks Pete
I had done hardeness analysis of a HF induction harden cutting blade (1045 steel) which shows a heat effected zone (HAF) about 0.7mm from cutting tip at ~ 32HRc to about 1.0mm, while tip hardness is ~ 52 HRc and body hardness is 44 HRc.
I was under the impression that HAF is not generated by HF induction hardening? Am I correct???
Thanks Pete





RE: induction hardening
Rao Yallapragada
RE: induction hardening
RE: induction hardening
RE: induction hardening
You need to find out if the problem is with heating, did this area not get hot enough, or is it quench, too much delay.
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RE: induction hardening
RE: induction hardening
It sounds like you only have some hardness data and you need to have a complete metallurgical analysis done to understand the issue at hand.
Rao Yallapragada
RE: induction hardening
RE: induction hardening
RE: induction hardening
Rao Yallapragada
RE: induction hardening
If you look at a cross section the HAZ should also follow the contour of the hardened edge.
If the HAZ is wide mess, then I would suspect that the inductor was not well focused and you got a lot of stary field heating, and/or there was a delay before quench.
= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm
RE: induction hardening
I don't normally get a transition zone on a 4150H (quenched & tempered to 42 to 45.0 HRC) shaft that we induction harden because of very good quench. Case depth on this shaft is 0.250" to 0.350" to 50HRC.
I do see a transition zone on a 15B41 (normalized) shaft and the case depth is 0.350 to 0.450" to 40HRC. It is very difficult to quench this part effectively because so much heat is put in to the part to obtain the case depth. The transition zone widens if the quench severity worsens.
In my opinion also, the transition zone would be narrow or absent if part was quenched very well.
Rao Yallapragada
RE: induction hardening
RE: induction hardening
RE: induction hardening