Laser Clad Materials at Endlas LC
There are a wide range of materials for advanced coating solutions to severe corrosion and wear problems. The materials that are available for laser coating steel substrates are vast, yet the possibilities have been narrowed to 6 categories of materials. These are Fe based alloys, Co based Superalloys, Ni based Superalloys, Nickel Alloys with WC particles, Cobalt Alloys with WC particles, and Nanostructured Ultra Alloys. There are many resources available that go into great detail describing these alloy groups.
Coatings thickness for most all materials can range:
0.002” to >0.25” thick
Laser Clad Fe Based Alloys
Advanced Steels alloyed with Cr, Co, W, C, Si, Mn, V, and Mo have high RT hardness through standard heat treatment cycles. These alloys are more susceptible to corrosive attack and result in poor ‘as clad’ surface finish. Carbide and Boride precipitates strengthen the steel matrix.
Laser Clad Cobalt Based Superalloys
Cobalt is alloyed with W, Cr, Mo, Fe, Ni and C to stabilize an austenitic FCC structure. Precipitation hardening does not increase the strength in these alloys therefore very fine solid solution precipitates that form during solidification provide the strengthening.
Laser Clad Nickel Based Superalloys
Nickel Superalloys are complex alloys where both precipitation and solid solution hardening develop strength over a wide range of temperatures. Oxide dispersion hardening provides solid solution precipitates and is mechanically alloyed into the precursor powder.
Laser Clad Tungsten Carbide in Nickel
These alloys utilize a ‘self-fluxing’ matrix of Ni with small additions of Cr, Si and B so the matrix fully encapsulates the WC particles. The WC can be spherical, faceted or both.
Laser Clad Tungsten Carbide in Cobalt
These alloys utilize a ‘self-fluxing’ matrix of Co with small additions of Cr and C so the matrix fully encapsulates the WC particles. The WC can be spherical, faceted or both.
Laser Clad Nanostructured Ultra Alloys
This new category of advanced materials is a result of nano-structured phases that enhance strength and other properties. These alloys can be laser processed without an inert environment and are known to have hardness greater than 2000 Vickers.