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A welding undercut is a critical groove defect melted into the base metal at the weld toe and left unfilled by filler material. This reduces the part’s cross-sectional thickness and creates sharp stress risers prone to fatigue failure, typically resulting from excessive heat input or overly fast travel speeds.
When welding metal plates thicker than 6mm (1/4 inch), standard square butt joints usually fail to achieve full penetration. To solve this, the edges of the base metal are machined or cut at an angle before welding. This preparation is a bevel.
Plasma cutting uses ionized gas to form a high-temperature channel that cuts through metal. This method offers a good balance between cut quality and cost for stainless steel. It works well for both prototypes and large production runs. The edges are cleaner than those from oxy-fuel cutting. Plasma cutting is also more budget-friendly than laser cutting and suitable for many uses.
Phosphating is a chemical process in which a phosphate coating is applied to a metal surface. This coating is a difficult-to-dissolve transformation layer composed of metal phosphates. It acts as a protective layer, shielding the metal from corrosion, wear, and other environmental damage.
Phosphating works through chemical reactions between the metal surface and a phosphate solution. When the metal is immersed in the solution, the phosphoric acid reacts with the metal ions to form a layer of insoluble phosphate crystals.
E-Coating (electrocoating) is an advanced immersion painting method utilizing electrical current to deposit a uniform organic polymer layer onto metal. It ensures 100% coverage of complex geometries and internal cavities, delivering superior salt-spray corrosion resistance without runs, sags, or thickness variations.
Getting good results when grinding stainless steel starts with choosing the right tools and methods. Use aluminum oxide or ceramic abrasives made explicitly for stainless steel. Keep the metal cool during grinding to avoid heat discoloration. Work with light to medium pressure and move constantly to prevent overheating one area.
Metal burrs can be small and sharp protrusions on metal edges after machining operations such as drilling or milling. These are bits of metal that have not been removed cleanly from a part. They can leave a jagged or rough edge.
A welding fixture is a device or tool used to hold and position workpieces during welding. It ensures parts stay aligned correctly, making the welding process more accurate and efficient. These fixtures are used in manual and automated welding for precise and repeatable results.
A fly cutter is a rotary cutting tool that attaches to a milling machine spindle and rotates to remove material. The cutting bit extends from the tool body and cuts in an arc pattern with each rotation, creating a smooth, flat surface.
The tool creates flat surfaces because the cutting edge is set at a consistent height. Each pass removes a thin material layer, and the milling machine’s feed movement creates a flat surface. This process is sometimes called “fly cutting” because of the cutting edge’s sweeping motion.
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