Cobalt Alloy Scraper Strips for Abrasive Decanter Service | SYTOP

Scraper strips in decanter centrifuges handling abrasive solids are exposed to wear during operation. Replacement parts must match the specified material, dimensions, and mounting details. SYTOP supplies custom COCRIX™ cobalt alloy scraper strips, produced as solid alloy parts and machined to customer drawings.

Wear and Corrosion in Decanter Centrifuges

A decanter centrifuge separates solids from liquid in a rotating bowl. The screw conveyor moves the separated solids toward the discharge end. Hard particles can wear the surfaces they contact. If the liquid phase is corrosive, it can also attack exposed metal surfaces.

In sludge dewatering, sand and grit can abrade components in contact with the solids. In mineral processing, hard mineral particles in the slurry can cause abrasive wear. The severity of wear varies with the particles and operating conditions, while corrosion depends on the liquid composition and temperature.

As scraper strips wear, they lose material and their working surfaces change shape. Replacement strips must match the dimensions, profile, and mounting details specified in the component drawing.

Solid Cobalt Alloy Scraper Strips

Cobalt-chromium-tungsten alloys are used for metal wear parts that need abrasion resistance, corrosion resistance, and mechanical strength. Hard carbides help resist wear, and chromium contributes to corrosion resistance. Wear and corrosion performance vary with the alloy composition and service conditions.

SYTOP has produced powder-metallurgy scraper strips using UNS R30016 as the chemical composition reference, corresponding to the composition associated with Cobalt Alloy 6B. The strips are made from cobalt alloy throughout their cross-section. The order specifies the chemical composition, powder-metallurgy process, and finished dimensions.

In a solid alloy strip, cobalt alloy extends through the full thickness of the part. In a coated steel component, the wear-resistant material forms a surface layer over a steel substrate. SYTOP can supply solid cobalt alloy strips.

Custom Manufacturing and Weight Matching

SYTOP produces these strips by powder metallurgy and machines them to the dimensions and tolerances in the customer drawing. Custom production can also be based on new, unused reference samples or confirmed dimensional requirements.

For specified matched sets, SYTOP can control the weight difference between scraper strips to within 3 g, and the parts are supplied in matched sets.

Repeat orders can use the previously confirmed drawing and material specification. If dimensions or other requirements change, production follows the revised drawing confirmed for the new order. SYTOP supplies the custom parts through alloy production, machining, inspection, and delivery.

Frequently Asked Questions

Can SYTOP supply scraper strips for my existing decanter?

Yes. SYTOP manufactures custom scraper strips for industrial decanter centrifuges, including parts for Flottweg & Alfa Laval equipment. Send your component drawing or a new, unused reference sample so we can assess whether the part is within our manufacturing capabilities.

Are sintered scraper strips the same as cemented carbide strips?

Sintering is a manufacturing process. It is used to produce both cobalt alloy parts and cemented carbide parts, which are different materials. The strips described here are cobalt-chromium-tungsten alloy parts produced by powder metallurgy.

Can SYTOP manufacture a replacement from a used strip?

Sample-based manufacturing requires a new, unused sample. SYTOP cannot reproduce a part from a used strip. If only a used strip is available, please provide a production drawing or confirmed dimensional requirements.

Request a Quotation for Custom Scraper Strips

Send your drawing and required quantity to SYTOP, together with the material specification and any weight-matching requirements. If you have a new, unused reference sample, let us know. We can assess the manufacturing requirements and quote for your custom cobalt alloy scraper strips.

Email sales@cocralloy.com or contact SYTOP via WhatsApp / WeChat at +86 130 0924 9727.