In simple terms, hard surfacing or “hardfacing,” is a metalworking procedure where you deposit tougher and harder material to a surface of a base metal.
An example of a hardfaced excavator bucket
The primary purposes of hardfacing are for the general improvement of the base metal.
You can perform hardfacing if:
You want to prolong the lifespan of your parts and/or components
Your parts are already worn-out, to restore them
You’re looking to improve the performance of whatever part you have
You want to apply a wear-resistant material to your surface
Hard Facing Welding Rod in Hardfacing
A welding rod is an electrode; and what this means is that it’s what you deposit to the surface of your base metal.
Hardfacing electrodes or welding rods
Without a hardfacing welding rod, you wouldn’t be able to apply or deposit a tougher, stronger, and a more durable material.
You can choose from a wide variety of hardfacing welding rods available in the market; it’s not just limited to one (1) kind.
What are the Advantages of Hardfacing?
Why should you perform hardfacing? Does it give you any benefit or advantage at all?
A damaged chute because it doesn’t have hardfacing
We’ve gathered some of the most sought after advantages you can have in performing hardfacing:
Decreased Downtime Instances
Adding up an extra layer of protection to your parts and components can help it become durable. Thus, reducing the instances of breakage, damage, and downtime.
This is one of the many reasons why a lot of people go with hardfacing.
Longer Lasting and More Durable Parts and Components
What’s the most common reason why some base metals get worn out? – Because of having little-to-no protection.
With hardfacing, you not only get extra protection; your parts can also become abrasion and corrosion-resistant, too, making them last longer and become more durable.
A significant reduction in cost is one of the most notable benefits of hardfacing.
Because of the fact that it allows base metals to be stronger, tougher, and more durable, you will have fewer needs to repair and replace them – giving you relevant reduction in cost.
Better Part Performance
Imagine a chute without any type of hardfacing – do you think they’ll function properly?
They absolutely will, for a time. However, if you continue to use it without any sort of protection, it’ll be damaged – and not for long, it can break.
If it has a hardfacing coating, you can expect it not to wear down easily. Making it function better and more efficiently.
Reduced Storage Space Needs
Hardfacing protects your parts and components to be worn out; reducing the need for you to store spare and back-up resources.
In asking what hardfacing is, these benefits can clearly give you the answers you’re looking for.
To let you know, though, these aren’t the only advantages you can get with hardfacing, there are a lot more!
But, the endpoint of these benefits and advantages would fall on you gaining more savings and reducing costs!
Thermal Spraying vs. Hardfacing: How Do They Differ?
Hardfacing and thermal spraying aren’t two (2) fruits from a different tree.
Thermal spraying procedure in hardfacing a round workpiece
As a matter of fact, thermal spraying is one of the processes used in hardfacing. Hardfacing is the more general term of material deposition over a base metal.
Thermal spraying is a kind of hardfacing technique where droplets of semi-molten material are deposited, creating the coating or the hardface.
The Most Common Materials Used in Hardfacing
Now that we’re aware of the fact that hardfacing utilizes tougher and stronger material, what are the most common ones you can use for it?
Nickel-based alloys – one of the most common materials used in hardfacing
The most common materials you can apply in a hardfacing procedure includes:
Chromium carbide alloys
What is NOREM?
If you got confused with what NOREM is, don’t worry – you’re not alone.
NOREM is known as a hardfacing material developed by the Electric Power Research Institute or the EPRI.
It’s a cobalt-type hardfacing alloy that is wear resistant and is known to have replaced other cobalt-based.
You can find NOREM in nuclear and chemical industries, and sectors of those sorts.
As of today, there are a total of eight (8) variants of NOREM, namely:
Methods Used to Deposit Hardfacing
There are quite a few techniques and processes you can perform to deposit hardfacing.
A construction machinery part hardfaced using laser cladding
Some of the most common welding processes include:
Shielded Metal Arc Welding (SMAW)
Oxy-Fuel Welding (OFW)
Electro Slag Welding (ESW)
Submerged Arc Welding (SAW)
Plasma Transferred Arc Welding (PTAW) or Powder Plasma Welding
Gas Metal Arc Welding (GMAW)
Apart from welding procedures, you can also perform other techniques, which are:
Cold Polymer Compounds
The goal is to be able to deposit the material onto the surface, so any of these processes is good.
Do You Need to Heat Workpieces Before Hardfacing Them?
One of the general rules of hardfacing is that all workpieces must be brought to room temp.
Semi-molten material being used for hardfacing
However, it’s not something you should abide by 100% of the time.
In fact, some metals and alloys are required to be preheated before working on them; this will depend on the chemical composition of that alloy or metal.
Is Hardfacing Limited to Just One (1) Layer?
No, hardfacing can even go up to two (2) to five (5) layers, depending on the product.
Multiple-layer hardfacing on a heavy-earth moving equipment
Products that are a part of metal carbide families are just limited to just 2 to 3 layers. On the other hand, though, you can apply an unlimited amount of layers if you use austenitic and martensitic products.
Being in the business for more than a decade, we have mastered every process there is. From manufacturing hardfacing machines, to providing hardfacing solutions to businesses that need it – you can count on us!
Add the fact that we employ the best, the most skilled, and the most talented engineers and tech experts, you will never regret your decision of choosing us!
Unlike other manufacturers, we don’t just focus on one (1) type of hardfacing equipment – we offer a vast array of options, and you can customize the machines and how you want it, too!
If you choose us, you’ll never fall short of the hardfacing machines you’ve always wanted.
Contact us by sending us an email about the products you need! We will be more than glad to give you a free quotation!
Get the hardfacing machines you need at the lowest and the most discounted rates, without compromising the quality!