If you’ve ever visited a job site where industrial components are rebuilt, or walked through a manufacturing floor, you’ve likely seen Laser Cladding Machines at work—they’re the ones that deposit a thin, high-performance layer of material onto worn or low-grade parts, turning them into something tougher, longer-lasting, and more corrosion-resistant. As a supplier of these machines, I get asked a lot of questions about what makes a laser cladding process work well, and more specifically, why wavelength seems to matter so much to our clients. It’s not a flashy topic, but it’s one that can make or break a job: get the wavelength right, and you finish on time with a perfect part; get it wrong, and you’re redoing layers, wasting powder, and falling behind schedule. Laser Cladding Machine
Let me break this down the way I explain it to our customers, starting with the basics. Laser cladding works by using a focused laser beam to melt two things at once: the metal powder we feed into the nozzle, and the top layer of the base part we’re working on. The melted mixture cools almost instantly, forming a dense, metallurgically bonded layer that’s way more durable than just coating the part on top. The laser’s job here is to deliver energy accurately, and wavelength is the core of that energy delivery—because different laser wavelengths interact with metals completely differently. That’s why when a customer calls and says, “I’m cladding stainless steel—what laser should I use?” the first question I ask is, “What wavelength are you considering?” It’s not a trivial detail.
Let’s start with the most common wavelengths in laser cladding, because that’s what most of our clients use daily. The two big ones are near-infrared (NIR) lasers, usually around 1064 nm, and fiber lasers too, which often land in that same 1000–1100 nm range, and then there are medium infrared (Mid-IR) lasers, like 10.6 μm CO2 lasers. These are the workhorses, and each acts differently when they hit metal.
Take NIR lasers first. For most ferrous metals—carbon steel, stainless steel, tool steel—this wavelength is absorbed really well, almost immediately. Think about it: if you’ve ever used a laser pointer to cut a piece of thin steel, or even just heat a spot on a can, that’s the same general range. For ferrous materials, the absorption rate at 1064 nm is around 30–50% at room temperature, and once the metal starts melting, that jumps up to 80% or more. That means less energy is lost bouncing off the surface, so more goes into melting the powder and the base part. That’s why 1064 nm lasers are our top-sellers for general-purpose cladding jobs. They’re reliable, work great for most common steels, and are efficient enough to keep production moving. I’ve had a customer cladding pump shafts for oil and gas tell me that switching to a 1064 nm fiber laser cut their cladding time per shaft by 15%—no magic, just better energy transfer.
But here’s the catch with NIR: some materials absorb this wavelength really poorly, especially non-ferrous metals. Aluminum, copper, brass—those are headaches for 1064 nm lasers. At room temperature, aluminum absorbs only about 10% of NIR light, and copper is even lower, around 3–5%. That means most of the laser energy just bounces off, or gets absorbed by the plasma that forms when the powder hits the beam, instead of melting the part and the powder. The result? Wasted powder, uneven layers, or even the laser reflecting back and damaging the machine’s optics. I had a new customer a few years back who tried using a standard NIR laser to clad copper heat sinks for electronics; he ended up with 20% of the layers being porous and had to scrap a whole batch. That’s when we explained that non-ferrous metals need a different wavelength.
That’s where Mid-IR lasers come in, specifically CO2 lasers at 10.6 μm. For non-ferrous metals, absorption is way higher at this wavelength. Aluminum absorbs around 40–50% of Mid-IR light, and copper jumps to 30–40%—way better than NIR. That means the energy goes where it needs to, melting the powder and the base part instead of bouncing off. But Mid-IR has its own downsides, which is why it’s not the first choice for ferrous materials. For steel, absorption at 10.6 μm is only around 10% at room temperature, so you need a way more powerful laser to get the same melting effect. That means higher electricity bills, more heat input into the part, and a higher chance of warping thin components. I once worked with a customer who clad thin steel brackets using a CO2 laser; the warping was so bad they had to add a post-cladding straightening step, adding 20% to their total cost per part. It’s a trade-off: Mid-IR is great for non-ferrous, terrible for thin ferrous.
But it’s not just about NIR vs. Mid-IR. There’s a whole middle ground, and newer laser technologies are blurring these lines. Diode lasers, for example, often operate in the 800–980 nm range—so still NIR, but with a slightly shorter wavelength than the 1064 nm standard. These are particularly good for cladding materials with high thermal conductivity, like copper or aluminum, because their shorter wavelength is absorbed a bit better than 1064 nm in these metals. A customer who makes heat exchangers for electric vehicle batteries now uses diode lasers for cladding the aluminum fins; they told me they get less porosity and fewer defects than when they tried a 1064 nm fiber laser. That’s a perfect example of how wavelength isn’t a one-size-fits-all number—even small shifts in the infrared range make a difference.
Another big factor is the material you’re cladding, and that ties directly to wavelength. Let’s talk about ceramic-metal composites, or cermets—those are super popular for parts that need to resist extreme wear, like mining equipment components. Cermets are usually made of tungsten carbide or titanium carbide mixed with a metal binder, like nickel or cobalt. For cladding cermets, NIR lasers work really well, because they heat the metal binder enough to melt it, while the carbide particles stay solid, creating a dense, hard layer that’s perfect for digging equipment. If you tried using a Mid-IR laser for cermets, you’d risk overheating the carbide particles, making them crack or decompose, which ruins the wear resistance. I’ve seen that happen first-hand with a mining customer years ago—they used a CO2 laser for cermet cladding and ended up with layers that wore out in half the time they should have. The wavelength wasn’t matching the material’s needs, and it cost them money.
Corrosion-resistant alloys, like Inconel or Hastelloy, which are used in chemical processing and aerospace, are another case. For these, 1064 nm NIR lasers are standard, but there’s a caveat: the thickness of the part matters. If you’re cladding a thin pipe wall, less than 5 mm thick, a NIR laser can put out too much energy if you’re not careful, leading to burn-through. But a diode laser with a slightly shorter wavelength can be operated at lower power for the same effect, because it’s absorbed more evenly, reducing heat input. That’s a big win for aerospace customers, who work with tight tolerances—they can’t have parts warping or burning through, so matching wavelength to part thickness is just as important as matching it to the cladding material.
I also get asked about the impact of wavelength on cladding quality, specifically porosity and bonding. Porosity is one of the most common defects in laser cladding, and a big part of that comes from how the laser interacts with the powder and the surface of the part. When the laser’s wavelength is poorly absorbed, you get what’s called “keyholing” or unstable melting— the laser creates a deep, narrow hole in the molten pool, and gas gets trapped in that hole, leading to porosity when the layer cools. Or the powder doesn’t melt evenly, so you get gaps between the powder particles and the base part, leading to bad bonding. A customer who makes valve components for nuclear power plants once had a porosity issue that was driving up their inspection time by 30%; after we adjusted them from a 1064 nm laser to a 940 nm diode laser, their porosity dropped to almost zero, and their inspection time went down. It’s not that porosity is caused only by wavelength, but wavelength is a major contributing factor.
Another point that’s often overlooked is maintenance and long-term performance of the laser machine. Different wavelengths require different optics, and different levels of care. NIR lasers, especially fiber and diode lasers, use simpler, cheaper optics that are less prone to damage from reflected laser light—this is a big deal, because when laser light reflects off a part, it can back into the machine and damage the lenses or mirrors. For Mid-IR CO2 lasers, the optics are more sensitive, and reflected light is way more likely to cause damage, so operators have to be more careful with parameters, and replace optics more often. That translates to higher operating costs over time. I always tell customers to think beyond just the upfront cost of the laser—if you’re going to be cladding non-ferrous metals and need a Mid-IR laser, you have to budget for more frequent optical replacements. But if you’re working with mostly ferrous materials, a NIR laser will save you money in maintenance and operating costs.
Now, let’s talk about emerging applications, because that’s where wavelength is even more important. Electric vehicle (EV) manufacturing is a huge one right now. EV components like battery terminals, motor shafts, and inverter parts require cladding with materials that mix ferrous and non-ferrous metals, which means a range of wavelengths might be needed. I’ve been working with a few EV parts makers who are looking at multi-wavelength lasers—machines that can switch between NIR and Mid-IR in the same process—to clad parts that have both steel and aluminum sections. That’s a game-changer, because before, they had to use two different machines for those jobs, which added time and cost. Multi-wavelength technology is still evolving, but it’s a perfect example of how laser wavelength is adapting to new manufacturing needs.
I also work with customers in the additive manufacturing space, where laser cladding is used to build parts from scratch, not just repair them. For 3D printing of titanium aerospace parts, wavelength is critical too. Titanium has a mid-range absorption for NIR lasers, but slightly better absorption for shorter NIR wavelengths, like 900 nm. Using a 900 nm laser reduces the heat input into the titanium, which minimizes residual stress in the final part—something that’s non-negotiable for aerospace, where parts have to meet strict fatigue and strength standards. A customer who makes titanium brackets for jet engines told me that switching from a 1064 nm to a 900 nm laser cut their residual stress by 40%, so they no longer have to do a post-print stress relief step, saving them days per batch.
After working with hundreds of customers over the years, I’ve learned that the right laser wavelength isn’t just a technical detail—it’s a decision that impacts every part of a job: cost, time, quality, and even long-term part performance. I’ve seen customers waste thousands of dollars because they picked a laser with the wrong wavelength for their material, and I’ve seen other customers become more profitable because they matched the wavelength to their needs. For example, a construction equipment company that clads bucket teeth used to use a one-size-fits-all NIR laser, which required them to use a higher-cost wear-resistant alloy powder. Once they switched to a Mid-IR laser for their non-ferrous tooth cores and adjusted the wavelength, they could use a lower-cost powder that was better absorbed, cutting their material costs by 25% while maintaining the same wear life. That’s the kind of result that makes wavelength matter.
Now, I know a lot of manufacturers are focused on production speed and upfront costs, and it’s easy to overlook wavelength as a secondary factor. But here’s the reality: cutting corners on wavelength leads to rework, wasted material, longer cycle times, and parts that fail prematurely. As a laser cladding machine supplier, my job isn’t just to sell a machine—it’s to help our customers get the best possible result for their specific job. That means asking the right questions: what material are you cladding? What base metal is the part made of? What are your quality requirements? What’s your budget for operating and maintenance? Only then can we recommend the right wavelength.
If you’re in the market for a Laser Cladding Machine, or you’re looking to upgrade your current setup to fix defects, reduce costs, or handle new materials, wavelength should be at the top of your list of things to discuss. Whether you’re working with carbon steel, stainless steel, aluminum, copper, cermets, or exotic alloys, there’s a wavelength that will give you the best results. We have a range of machines with different wavelengths, and our team works directly with clients to test their materials and find the perfect fit for their needs.
If you’re ready to talk through your specific cladding needs and find the right laser wavelength for your application, we’re here to help. Connect with us to discuss your projects, review our machine options, and get tailored recommendations that will improve your cladding process and your bottom line.
Laser Cladding Machine References
- Toyserkani, E., Khajepour, A., & Corbin, S. F. (2005). Laser Cladding. CRC Press.
- Steen, W. M., & Mazumder, J. (2010). Laser Material Processing (4th ed.). Springer.
- Kutsuna, M., & Chen, L. (2004). “Interaction of CO2 and YAG laser beams with copper.” Journal of Laser Applications, 16(2), 85–91.
- Sabooni, S., & Soylemez, F. (2018). “Effect of laser wavelength on porosity and microhardness of laser-cladded aluminum alloy layers.” Surface and Coatings Technology, 344, 695–704.
- Ion, J. C. (2005). Laser Cladding: A Review. Journal of Materials Processing Technology, 167(2-3), 283–301.
Wuhan King’s Laser Co., Ltd.
Wuhan King’s Laser Co., Ltd. is one of the leading laser cladding machine manufacturers and suppliers in China. We warmly welcome you to buy durable laser cladding machine made in China here from our factory. All machines are with high quality and competitive price.
Address: No.18, Liufangyuan Rd.(S), Wuhan, China
E-mail: info@kingslaser.com
WebSite: https://www.kingslaser.com/
