Hardfacing question

[Professor Marvel]

Have skid shoes on a grader scraper that need attention and someone in another thread suggested hardfacing. It sounds like just what I need for a part of this project.
I recently bought a Hobart 210 mig 220 welder and have no welding experience but need to accomplish this so I can rely on myself. I don't think this is a challenge for most of the welders here but I would appreciate suggestions. Some of you may have seen my efforts in another thread and maybe could continue with your advice and recommendations.
If not, I am trying to slow down the wear on the latest skid shoes on my grader scraper which has already begun to wear down faster than I want. Hardfacing was suggested and it sound like what I am looking for but I am not completely clear on that process or the materials required.
Thanks for any info

 

[Shield Arc]

I never did any hard facing with Mig, always with SMAW. On augers, clam buckets, etc, etc. Got all set up one time to do it with Mig, but got pulled off to do something else before I ever pulled the trigger. Here is a video I found about it tho.

http://youtu.be/klmTV6iY0BE

 

[Professor Marvel]

thanks Arc
seems like I need to get to work with gas already
oh well wouldn't want anything to be easy
in for a penny in for a pound as they say

 

[brain55]

I've done a little bit of hardfacing with MIG on a rockwheel trencher.

Hardfacing

I'm no expert for sure. All I know is that it worked really well, and was quite easy to apply. I was taught though, that the dirt that packs in between the rows of hardfacing is as important to the abrasion resistance, as the hardfacing itself.

Brian

 

[Professor Marvel]

Interesting Brian
That makes sense

 

[CNC Dan]

thanks Arc
seems like I need to get to work with gas already
oh well wouldn't want anything to be easy
in for a penny in for a pound as they say

At one time I was looking into MIG hardfacing, and found some gasless hardfacing wire. Can't remember much else about it. But it exists.

 

[brain55]

At one time I was looking into MIG hardfacing, and found some gasless hardfacing wire. Can't remember much else about it. But it exists.

The wire I used on the rockwheel didn't use a shielding gas.

Brian

 

[Big Barn]

At one time I was looking into MIG hardfacing, and found some gasless hardfacing wire. Can't remember much else about it. But it exists.

Lincoln offers several flux core and dual shield versions in addition to GMAW, but I think they are only available in 25 and 50 pound spools.

Terry

 

[MinnesotaDaveChalmers]

Never hard faced myself, thought the wire would be more expensive.
The 10 and 11 pounders are only around $100

 

[CNC Dan]

Lincoln offers several flux core and dual shield versions in addition to GMAW, but I think they are only available in 25 and 50 pound spools.

Terry

And they are often only available in larger sizes (.045" - 1/16").

But much harder to find in the smaller sizes (.030 - .035).

 

[MinnesotaDaveChalmers]

And they are often only available in larger sizes (.045" - 1/16").

But much harder to find in the smaller sizes (.030 - .035).

Should be fine, the hobart 210 he bought will run 0.045" flux core.

 

[BukitCase]

As much of a PITA and expensive as hardface wire/rod is (to me, anyway) if I were going to do a 6 foot long wear edge (x2) I'd ask local steel suppliers about cutting a couple of 6 foot x 2" strips of AR400, probably 1/4" or 5/16" thick - most can plasma or laser cut for you (out west, anyway) and then you can just use standard hard wire (er70-s6) which is consisered low hydrogen, and stitch weld the strips to the bottom. You'll most likely never need to do it again.

(Did I mention this stuff is HARD??!?) ...Steve

 

[Big Barn]

As much of a PITA and expensive as hardface wire/rod is (to me, anyway) if I were going to do a 6 foot long wear edge (x2) I'd ask local steel suppliers about cutting a couple of 6 foot x 2" strips of AR400, probably 1/4" or 5/16" thick - most can plasma or laser cut for you (out west, anyway) and then you can just use standard hard wire (er70-s6) which is consisered low hydrogen, and stitch weld the strips to the bottom. You'll most likely never need to do it again. (Did I mention this stuff is HARD??!?) ...Steve

If you go this route have them punch or laser cut square holes for mounting with plow bolts. Drill matching holes in your skid shoes and you won't have to weld. Plus you could have an extra pair cut to have on hand for a bolt on replacement. Maybe...?

Terry

 

[Shield Arc]

I was taught though, that the dirt that packs in between the rows of hardfacing is as important to the abrasion resistance, as the hardfacing itself.

That is what I was always told too. I always left it up to the equipment operator to tell me what pattern he felt was best.

 

[MinnesotaDaveChalmers]

A while back I found this hardfacing guide to be good reading.
Found it when I was doing research for a friend, found out by reading it hard-facing was not what was best in his case... :mur:

http://www.lincolnelectric.com/assets/US/EN/literature/C7710.pdf

 

[Arc weld]

Look on Stoody's site if you want to see pics and applications for hardfacing. Usually the smaller diameter wires require a shielding gas but the larger ones don't have to have it. I would guess that the smaller wires with shielding gas have a lot less smoke. I can't remember if .045 is the transition or if it's 1/16". For something like a skid shoe, you'd want beads running lengthwise. The problem with a 6' wear strip is warping. That's why I think a herringbone (V) pattern with the point of the V at the front would be a good compromise. You could stagger your welding and not get anything too hot. I think if the beads were about 5/8" apart would work nicely. I'm sure Stoody or another brand of hardfacing could give you a recommendation. AR400 is abrasion resistant but not as much as hardfacing can be. Anthor option is see if you have a UTP distributor near you. They make or used to make abradiscs(sp). They are oval shaped wear plates with the middle cut out to weld them on and they come with the welding rods. You'd need a stick welder though unless they could specify what MIG wire to use.

 

[Professor Marvel]

Herringbone it will be. I ask you folks because you know what you are doing. I would be foolish to not follow your direction.
Thank you

 

[Arc weld]

Herringbone it will be. I ask you folks because you know what you are doing. I would be foolish to not follow your direction.
Thank you

Hope it works out.:laughing: