Chain Sheave Problem
Chain Sheave Problem
(OP)
My company is having problems with a recent batch of safety chain sheaves. For years, we specified the sheaves be made from 1045 and flame hardened to Rc 55 max.
The vendor who supplied the last batch of sheaves said he was not setup to flame hardened, so he thru-hardened them in an oven to Rc 55.
The sheaves in service are failing. The Rexnord safety chain is digging up the sheaves.
My question is, can 1045 be thru hardened? Is it only supposed to be flame or induction hardened to get a surface hardness of Rc 55?
There is obviously a heat treating problem here, and I need some expertise.
Thanks in advance!
The vendor who supplied the last batch of sheaves said he was not setup to flame hardened, so he thru-hardened them in an oven to Rc 55.
The sheaves in service are failing. The Rexnord safety chain is digging up the sheaves.
My question is, can 1045 be thru hardened? Is it only supposed to be flame or induction hardened to get a surface hardness of Rc 55?
There is obviously a heat treating problem here, and I need some expertise.
Thanks in advance!





RE: Chain Sheave Problem
RE: Chain Sheave Problem
Flame or induction hardening is the desired method of increasing hardness for sheaves,sprocket wheel etc.
As an aside,did you not observe any distortion in the sheaves after they were through hardened? How was the bore finish machined after hardening?
Chocolates,men,coffee: are somethings liked better rich!!
(noticed in a coffee shop)
RE: Chain Sheave Problem
Flame hardened is appropiate. Inductin hardening would be an acceptable alternate. If such heat treating options are not available, then another material should be used.
rp
RE: Chain Sheave Problem