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...

Copyright Industrial Press Inc., 2002 under license agreement with Books24x7

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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.
Abrasive Compounds and Abrasive Slurries
Abrasive compounds and abrasive slurries are used to improve surface finish or flatness. They often consist of fine abrasives in slurry, bar, powder or paste forms.
Machine Shop Services
Machine shop services use machinery or equipment to perform custom removal of material to fabricate a finished part.

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...

Friction testers determine the coefficient of friction or the friction force. Additionally, they measure the resisting force tangential to the interface between two bodies when under the action of an...

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