[TheForge] Refacing old anvils?

Tue Apr 1 13:09:03 2003

Welcome aboard Grant.

Mike Graf

gblacksmith wrote:
> 
> Kevin:  The lack of preheat could have caused your cracking at the welded
> surface.  Without knowing your exact technique for doing this repair, I
> can't be sure.
> 
> Some claim that preheating is not necessary, others insist that it is.  If
> you choose to preheat (I would...I typically preheat generously when welding
> tool steel to low-carbon in "found art"sculpture.) you can use a weed
> burner.  I would recommend building a firebrick "igloo" around your anvil,
> and inserting the wide weed burner tip from the side or bottom, like a raku
> kiln.  Preheat the anvil to roughly 390F by blowing a low flame on each side
> of the anvil for 50 min. to one hour.  Use a tempil stick to measure
> temperature.
> 
> There is a company called Messer who makes a hard-facing welding rod called
> MG 710 which is used in this type of repair.  Note that final hardness will
> depend on how many beads you run. Contact Messer technical assistance for
> advice on the procedure...they have a 1-800 number.  DON'T TRY GUESSING!
> 
>     Also, I would recommend grinding out all of the previous weld...not all
> rods are compatible.
> 
> Remember to take you time and not rush the job.
> 
> I hope this helps
> 
>                                     Grant Marcoux
> ----- Original Message -----
> From: "Kevin" <[email protected]>
> To: <[email protected]>
> Sent: Tuesday, April 01, 2003 7:23 AM
> Subject: [TheForge] Refacing old anvils?
> 
> > I'm a relatively new member to the listserve and I wanted to ask for
> > opinions about making repairs to an anvil face.  I picked up an old anvil
> > about 8-9 years ago that has a pretty large divot in the work face.  The
> > defect is about 2x3 inches and is as deep as 1/2" at one point.  I used
> the
> > anvil to work smaller projects for about 3 years before I could find
> > another anvil in the area that I could afford.
> >
> > At one point I tried to build up the divot using a hard surfacing weld
> rod,
> > but saw that over time the repair began to develop a lot of cracks and
> > eventually began to chip as I worked the anvil surface.  Over the past
> > month I've been considering making a second attempt at the repair, this
> > time using a low hydrogen weld rod (7018) instead.  The anvil face has a
> > pretty high carbon content (I'm basing this on a spark test) so I'm not
> > sure what kinds of pre- and post-heating procedures I should use in the
> > repair.  In my first attempt I did not try to preheat the surface, and
> I've
> > heard that this may have been the cause of the cracking.  I've heard that
> I
> > should preheat the surface to ~350 degrees and maintain this temperature
> > through the weld repair and for 2 to 3 hours after I've completed the
> > repair in order to reduce cracking.
> >
> > I was wondering if anyone else has had experience in making this type of
> > repair to an anvil face, and if so, I'd appreciate any insight that could
> > be provided.
> >
> > Thanks,
> > Kevin
> >
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