Blast finishing is a surface treatment process that involves propelling abrasive media against a workpiece to remove contaminants, smooth rough surfaces, or shape the workpiece. It is commonly used in industries such as manufacturing, automotive, aerospace, and construction to prepare surfaces for coating, painting, or finishing. The abrasive media used in blast finishing can vary and may include materials like garnet, coal slag, alumina, and ceramic grains.
Fused blasting media refers to abrasive grains that are created through a process of combining different materials. One leading example of fused blasting media is MCA 1360®, a hard and extremely tough grain made of alumina-zirconia. These fused blasting media are known for lasting much longer than traditional abrasives, providing high performance in blast finishing applications.
MCA 1360® isn't the only fused blasting media on the market, and material innovations routinely push the frontiers of performance when it comes to high-performance blast operations. Selecting the right fused blasting media, therefore, requires careful consideration.
Desired Surface Finish
Premium fused blasting media offer superior control over Roughness Average (RA) down to the micrometer (μm) level, surpassing the capabilities of commodity grains like brown fused alumina. This enhanced precision ensures a consistently smooth finish over an extended duration compared to brown fused alumina. This is partly due to the narrow particle size distributions (PSD) and performance of premium fused grains. Commodity grains will vary widely in size and shape and quickly break down into finer sizes and even dust. Premium fused blasting media, meanwhile, is produced to the tightest of tolerances then holds those tolerances due to its greater durability. Thus, you can achieve your desired surface finish by selecting a grain with the right size, shape and performance—provided it is sourced from a quality supplier that also guarantees narrow PSDs.
Material Removal Needs
Stock removal requirements also dictate the type of fused blasting media you can use in your application. Sensitive materials may be subject to stress induction during lengthy blasting processes. In this case, angular grains with aggressive removal rates may be preferable. Spherical particles can still provide a high level of productive material removal, and they are associated with a more consistent impact energy transfer which tends to yield greater surface uniformity. However, spherical particles tend to peen the substrate surface and produce residual stresses. This tends to warp thin metal surfaces. It is also important to note that particle size and shape uniformity greatly contribute to coverage consistency and surface finishing quality.
Consulting with Industry Experts about Fused Blasting Media
Given the complexities involved in choosing the right fused blasting media, consulting with industry experts is invaluable.
Professionals in the field can provide insights on the most suitable fused blasting media for a particular application. They can also consider the latest advancements and best practices in abrasive technology. This expert advice ensures that the selected media aligns with both:
- The material characteristics of the workpiece
- The specific goals of the surface treatment process.
Ready to Pick Your Fused Blasting Media?
At Saint-Gobain Abrasive Grains, we are well-versed in helping users select the right fused blasting media for various applications, from the precision preparation of orthopedic implants to blast cleaning of ship hulls. We understand the varied needs of users across a gamut of industries.
Browse through our fused blasting media and learn about their benefits. If you are utilizing surface treatments during your manufacturing processes, we recommend that you select alumina-zirconia grains as your fused blasting media of choice. Take your time browsing through our fused blasting media products. We are certain you will find a material that will suit your project and process methods.