Custom Mesh Baskets with a lid and handles – stainless steel
Pratt Whitney manufacturing engineers needed to clean fasteners before they put them on sophisticated gear in their manufacturing process. In this application, the baskets will be exposed to an alkali based cleaning solution (13 ph) in three 60 minute cleaning cycles at temperatures approaching 200 degrees fahrenheit.
Eliminating scrap, Improving throughput and Reducing wasteful inspections are critical to Pratt Whitney’s process engineers. Marlin Steel engineers suggested nylon coating (picture is right before we coat) so the parts do not scratch and are pristine – reducing scrap and wasteful inspections. Probing the client to understand the fit, form and function, Marlin Steel engineers decided to use mesh that had eight openings per linear inch to hold the small fasteners. The baskets will have a lid to constrain the parts and handles to make it easy for the Pratt Whitney team’s automation to move the baskets through the elaborate carefully choreographed process.
By using ultrasonic vibration and pump agitation, the assorted geometry that will be washed and can be consistently cleaned.
Nylon coating material handling wire baskets is a great solution for protecting delicate machined parts from scratching. A scratched precision component causes rework and additional inspections – unacceptable in a high technology factory that requires a workforce devoted to improving throughput and not constantly going back to fix root cause problems. A scratched part that escapes an inspection team and shipped to the client causes additional client dissatisfaction.
Nylon Powder is a coating material which can be applied to any substrate that can withstand the process temperature of about 400 F.Marlin Steel typically deploys the fluid bed method. At the process temperature it fuses into solid Nylon. Nylon is FDA approved and the maximum useful temperature is 350 degrees Fahrenheit. Nylon comes in a matte or gloss finish.
Manufacturing engineers looking for stainless steel products want to know what type of stainless resists corrosion at different temperatures.
Stainless steel is not technically unable to stain or rust. Under low oxygen or high salinity (saltwater), it’s susceptible to corrosion. Various grades of stainless react differently, based on their chemical composition – how much carbon, chromium or nickel they contain. The chromium in stainless steel forms a film that blocks oxygen from corroding the steel surface. The result is “passivation,” which means the material is passive, not so active, when confronted by substances like air and water.
Temperature, fluids and stress on the structure can all spur corrosion. According to the McNally Institute website, the rate of corrosion attack doubles with every 18 F (10°C) rise in temperature. That can be caused by friction between parts as well. Continue reading →
Corrosion resistance of the two materials is not drastically different in mildly corrosive environments at ambient temperatures. In general, Grade 301 is a little less corrosion resistant than 304 because it has lower chromium and nickel content and higher carbon.
If 301 stainless is cut on a laser or welded, you’re more likely to see corrosion in the heat affected zones compared to 304 because of chromium carbide precipitation, which depletes the chromium in the heat affected areas. If the material is not regularly exposed to high temperatures, saltwater or other very corrosive conditions, 301 should be fine.
As a general rule, the smoother the surface, the less likely they are to experience corrosion. For example, cold rolled sheet metal or electropolished products will resist corrosion better than products with a brushed finish.
Yes. Marlin Steel can use nitrogen (at a 20 percent slower rate than stainless steel). However, it creates micro-cracking in the material. Depending on the client’s tolerances/specs, argon gas may be required to cut parts without micro-cracking in the material.
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