From Cam Design and Manufacturing Handbook

12.4 ABRASIVE WEAR

Abrasion occurs in two modes, referred to as the two-body and three-body abrasive wear processes.[7] Two-body abrasion refers to a hard, rough material sliding against a softer one. The hard surface digs into and removes material from the softer one. An example is a file used to contour a metal part. Three-body abrasion refers to the introduction of hard particles between two sliding surfaces, at least one of which is softer than the particles. The hard particles abrade material from one or both surfaces. Lapping and polishing are in this category. Abrasion is then a material removal process in which the affected surfaces lose mass at some controlled or uncontrolled rate.

Uncontrolled Abrasion Machine parts that operate in clean environments can be designed to minimize or eliminate abrasive wear through proper selection of materials and finishes. Smooth, hard materials will tend to not abrade soft ones in two-body contact. Smooth finishes minimize abrasion at the outset and, unless hard particulate contaminants are later introduced to the interface in service, that situation should continue.

Controlled Abrasion In addition to designing systems to avoid abrasion, engineers also design them to create controlled abrasive wear. Controlled abrasion is widely used in manufacturing processes. Two-body grinding is perhaps the most common example, in which abrasive media such as silicon carbide (Carborundum) are forced against the part under high sliding velocities to remove material and control size and finish. Cam surfaces...


Products & Services
Metallographic Grinding and Polishing Equipment
Metallographic Grinding and Polishing Equipment Metallographic grinding and polishing equipment includes grinders, sanders, polishers, grinder-polishers or other machines designed for metal, ceramic, mineral, composite and material surface preparation applications. The equipment provides a planar, polished surface enabling materials analysis using microscopy, spectrometry, hardness, nanoindentation and other techniques.
Finishing and Surface Treatment Services
Finishing and surface treatment services pretreat or finish the surfaces of manufactured components to meet roughness or surface condition requirements.
Honing, Lapping, and Super-finishing Machines
Honing, lapping and super-finishing equipment improve surface finish or geometry to tight tolerances.
Architectural Coatings
Architectural coatings include paints, sealers, and specialty coatings for floors, roofs, walls, ceilings, decks, pavement, walkways, concrete surfaces, and other building and construction applications.
Coating Services
Coating services apply a thin layer of material onto parts or products provided by a client. These services are used by companies that do not have coating technology and equipment in house.

Topics of Interest

12.5 CORROSION WEAR Corrosion occurs in normal environments with virtually all materials except those termed noble, i.e., gold, platinum, etc. The most common form of corrosion is oxidation. Most...

Abrasion occurs when a rough hard surface (e.g., steel) slides over a softer one (e.g., plastic) or when particles are trapped between rubbing surfaces. Adhesive wear occurs when local irregularities...

Glossary: Glossary [*] A abrasion The process of grinding or wearing away through the use of abrasives; a roughening or scratching of a surface due to abrasive wear. abrasive wear The removal of...

A Abnormal glow discharge (plasma) The DC glow discharge where the cathode spot covers the whole cathode and an increase in the voltage increases the cathode current density. This is the type of glow...

3.10 Abrasion Resistance The resistance to abrasion is closely related to other factors such as hardness, resiliency, and the type and amount of added fillers and additives. The resistance to...