Viewing a thread - Hard Facing

Ben D, N CA

Posted 4/4/ 00:15 (# - in reply to #)
Subject: RE: Hard Facing

For more information, please visit what is hardfacing in welding.

Whiskey, Tango, Foxtrot

Whiskey, Tango, Foxtrot

MIG welder is much faster, and I find it does a better job than stick. I always had problems with the stick, in order to get the rods to burn well and actually weld to the parent material, I had to use too much heat. You don't always want to actually 'weld' hardfacing in, esp on thin material like that. You just want to stick a bead onto it so it wears first. I've burned way to much stick hardfacing rod, but on heavy wear parts on crushers and loader buckets, dozer blades. It works fine on that, but I found MIG to be much easier to handle on thinner steel.

Flux core hardfacing wire is ironically, very soft. Sort of hard to feed. It is more expensive, but I much prefer using solid wire. Your buying all hard steel wire though, no flux. Have to weld mostly flat. Pull the bead instead of pushing the puddle.

Try different patterns and see what works the best. Some will wear better than others. Hard to know without seeing what your trying to hardface, but 45* patterns or X's usually work fine.

Hardfacing is a process of applying a wear-resistant layer of metal to a surface that is subject to wear and abrasion. The goal of hardfacing is to extend the service life of a component by improving its wear resistance and durability.

Hardfacing is typically done by welding or thermal spraying a layer of hard, wear-resistant material onto the surface of the component. The hardfacing material can be a variety of different alloys, such as high-carbon steel, stainless steel, cobalt alloys, or nickel-based alloys.

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The specific hardfacing material used will depend on the type of wear and abrasion that the component is expected to encounter, as well as the operating conditions of the equipment. Some hardfacing materials are better suited for high-impact wear, while others are better for sliding wear. For example, cobalt alloys contain some types of carbides and are ideal for severe abrasion at high temperatures, but not necessarily to withstand hard impacts. The tensile strength of the filler metal chosen can give you an indication of what the material is better suited for.

Hardfacing can be applied to a wide range of components, including mining equipment, agricultural machinery, valves and pumps, drilling tools, and machine parts. Some examples of components that are commonly hardfaced include buckets, teeth, and blades for excavators and bulldozers, wear plates for chutes and hoppers, and rolls and guides for steel mills.

In a few words, hardfacing is an effective way to extend the service life of components that are subject to wear and abrasion, helping to reduce maintenance costs and improve the performance and productivity of the equipment.

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