Metaullics MSA Self-Aligning Bearing

Lowers operational cost of CGL with increased submerged roll bearing life. Enhances sheet finish quality by eliminating "skidding" caused by roll lock-up. Excellent for low tension, high speed lines Can help eliminate sheet fluttering, reducing costly zinc overrun on sheet surface. Eliminates start-up vibration caused by stabilizer or correcting roll. Self-aligning feature allows low design clearance between sleeve and bearing. Excellent hardness at operating temperature.

 

 

Metaullics Super Alloy (MSA) Materials….in Simple Terms.

The family of Metaullics Super Alloys(MSA's) have been specifically developed to maximize their operating life in galvanizing, galvanneal, and galvalume baths. Each patented MSA has a slightly different formulation that optimizes the material properties, depending on whether it is being used as a bearing material, pump insert material, or a roll material. When used as a component in a zinc or aluminum pot, the optimum material properties are:

Very low solubility in molten zinc or zinc/aluminum alloys. Minimized aluminum diffusion into the material. Low adhesion (non-wetting) of zinc/iron and zinc/iron/aluminum dross. High surface hardness. Dimensional stability at operating temperatures up to 1300 deg F. High thermal shock resistance. Economic viability.

 

In simple and general terms, MSA's achieve the above desired results through the following:


1. The formation of strong covalent bonded molecules, promoted to generate a microstructure rich in hard and steady carbides. Moreover, maximizing the formation of carbides by proper selection of the carbon ratio to carbide forming elements. All MSA materials promote rapid carbide formation of varying sizes with high carbide densification and distribution, resulting in excellent hardness.

The carbide formation also maximizes the non-wetting characteristic of the material. This is perhaps the result of the low energy surface carbides and high surface hardness.

Finally, during the formation of the intermetallic region, an area rich in carbon develops immediately in front of the diffusion zone, retarding the aluminum diffusion process.

2. The promotion of a thick and complex intermetallic region.

MSA components are specifically chosen to increase the intermetallic region, with the exception of a small concentration of alloys required for casting and/or machining reasons. An increase in the intermetallic region decreases the diffusion rate.

3. By choosing alloying elements that narrow the Gamma Iron region.

With few exceptions, the alloying components used in MSA strongly narrow the Gamma iron region. This creates a strong increase in the crystal's internal energy, strengthening the alloy and reducing its solubility. Narrowing the Gamma Iron region lowers the mass transfer rate, increases the thickness of the diffusion layer, resulting in higher corrosion resistance in molten zinc and zinc/aluminum environments.

Final Result… A family of materials ideally suited for operation in your metal coatings line.