Basic of Hardfacing

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At work we hired a shop manager that was suppose to begin hard-facing drilling augers, long story short, he no longer works for us.I have what I would call moderate welding (hobby) skills, and a some of our shop guys are welders.  At least they went to school for it....We have a Miller 250, with .045 Lincore55I ASSUME the process is similar to most welding procedures -  clean metal, sufficient penetration, etc.. I have never hard-faced anything before.  Is there anything different I should know or look for?Any good references?  I searched the Lincoln and Miller sites but not much "How To" there.Thanks
Reply:Start by reading this Lincoln Hardfacing Guide:  http://www.lincolnelectric.com/asset...ture/C7710.pdf"Discovery is to see what everybody else has seen, and to think what nobody else has thought" - Albert Szent-Gyorgyi
Reply:I believe you use 100% co2 with most hardfacing wire.Torchmate 2x2 CNC with Flashcut CNC controlsHypertherm Powermax45 Esab ET220i Razorweld 195 MigRazorweld 200ac/dc TigTormach 770, Tormach xstechRazorweld, Vipercut/Vipermig, SSC Foot Pedal Dealer
Reply:Originally Posted by ManoKaiStart by reading this Lincoln Hardfacing Guide:  http://www.lincolnelectric.com/asset...ture/C7710.pdf
Reply:@ WH4F - No problem.  That ref is primary for SMAW and SAW processes.Lincoln Electric's FCAW-G (flux-core, gas-shielded) wires such as "Lincore BU-G" and "55-G" require axial spray transfer and Ar/CO2 blends of shielding gas for placement. Your MIG machine needs to output voltages in the 25-30 range.  Your MM250 will be able to rip it w/ 250A at 28 VDC   (40% Duty) & 200A at 28 VDC (60% Duty Cycle). The "55-G" operating parameters are at http://www.lincolnelectric.com/asset...5-G/c71012.pdf.Note: 100% CO2 is used for globular/axial transfer, but not ideal if spatter is a concern.  Fusion is good but overall setup sketch.Ran some glob/axial processes today at Lincoln Electric in OH.   Sweet ride.  PM me if you have any specifics about your hardfacing application.  Will relay the message to the RED Pros and see what they say.  Solid dudes at LE.Last edited by ManoKai; 08-27-2013 at 06:43 PM."Discovery is to see what everybody else has seen, and to think what nobody else has thought" - Albert Szent-Gyorgyi
Reply:U of Y (University of YouTube) is your friend!!!!Lincoln Power Mig 216Lincoln AC/DC-225/125Miller  625 X-Treme PlasmaMiller 211 Forney 95FI-A 301HF 91110Victor Journeyman O/PMilwaukee DaytonMakita  Baileigh NRA Life Member
Reply:Originally Posted by SuperArcU of Y (University of YouTube) is your friend!!!!
Reply:Beginners often want to run hot for maximum penetration and generally you run cold for minimum dilution of the alloy.  Follow the guidelines on the box.  Also "MORE" is not always the best.  For something like an auger the location of your beads is important.
Reply:Originally Posted by SuperArcU of Y (University of YouTube) is your friend!!!!
Reply:More typical of the larger auger rigs.  we run 6" and 8" hollow stem and solid stem augers.  The auger blades are about 5/16" thick, but I haven't actually measure them.  Each 5-ft section weighs about 80-lbs.Our rig is similar to this one. (I know everyone hates links but I don't have any photos handy)http://www.totaldrillingsupply.com/i...f-6-r1580.htmlI have a call in the manufacture to determine the actual material the augers are made of and if they have a procedure for hardfacing.  The Lincoln guide (Posted previously) was helpfull
Reply:Originally Posted by WookieWeldingwhat so he/she can see how it is done wrong ?
Reply:Ones of this type that i have seen done usually have a pass on the blade from the center to the outside  and were cross hatched from the blade up about 6 or 8 inches on the helix I don't know if they did the outside edge of the helix but it would make sense to do the first 6 to 8 inches also since that would be the part getting the most wearLike was said you don't lay it on hot you just want it to bond not mix with the base metal ...your not welding you are surfacing or pad weldingTake a soapstone measure up say 8 " from the cutting edge for a top border and draw angle lines say every inch angle right..///// then a series crossing left..\\\\\ the x ...standard cross hatch patternEasier if you make mistakes in soapstone ....if you like what you see follow the lines and burn it Try to use a practice piece to get the wire feed speed and travel speed down so you get uniform stringer beadsGood luck...it isn't that hardBacked my CATMA over your CARMA oops clusmy me  What would SATAN do ?? Miller Trailblazer 302 AirPakMiller Digital Elite  Optrel Welding HatArcair K4000Suitcase 12RC / 12 VSHypertherm PM-45Rage 3 sawRusty old Truck
Reply:Originally Posted by WookieWeldingwhat so he/she can see how it is done wrong ?