16 Surface Finish Flashcards
Involves a change of surface properties to produce a hard, wear resistant shell about a tough, fracture resistant core
Case hardening
Method used to check case depth on service parts
Eddy current ET
An increase or addition of carbon to create a case depth
Carburizing
Parts to be carburize maybe packed in carbon were other carbonaceous material in boxes that are sealed to exclude air and then heated in a furnace for the required length of time, in a process sometimes referred to as
Pack hardening
A case hardening process that does not require a change of composition in the surface material is
Flame hardening
Water containing sulfuric acid in a concentration for about 10 to 25% and at a temperature of approximately 65°C is commonly used in a process called
Pickling
Cleaning method in which the cleaning medium is accelerated to high velocity and impinged against a surface to be cleaned
Blasting
Blasting method that can improve surface finish, surface properties and is beneficial by reducing the likelihood of fatigue failure
Shot peening
Water containing rust inhibiting chemicals may carry, in suspension, find abrasive particles that providing grinding and cutting type of action for finish improvement along with cleaning is known as
Liquid honing
Maybe interpreted to mean any non-precision procedure providing a glossy surface but is most commonly used to refer to a surface finishing process using a flexible abrasive wheel
Polishing
A fine abrasive carried in a wax or a similar substance is charge on the surface of a flexible wheel is known as
Buffing
If a work is suspended in an electrolyte and connected to the anode in an electrical circuit, it will supply metal to the electrolyte in a reverse plating process. This polishing method is known as
Electropolishing
A mixture of pigment in a drying oil
Paint
A combination of natural or synthetic resins and drying oil
Varnish
A mixture of pigment in varnish
Enamel
Enamel that is actually a thin layer of glass fuse onto the surface of a metal usually steel or iron
Porcelain or Vitreous
Shattered glass, ball milled in a fine particle size is called
Frit
Frit is mixed with clay, water, and metal oxides which produces the desired color, to form a thin slurry called
Slip
A process in which metal wire or powder is fed into an oxyacetylene heating flame and then, after melting, is carried by high velocity air to be impinged against the work surface
Metallizing or metal spray
A process by which steel, heated in the presence of zinc dust becomes coated with zinc
Sherodizing
Coatings are often apply to protect the material; their thickness can frequently be determined nondestructively by
Eddy current ET
The best and most economical cleaners used for removal of oils and grease are
Petroleum solvents
A corrosion protection material, only apply to steel by hot dipping and galvanizing is
Zinc
A process that converts the base metal surface to an oxidized barrier layer of a very small porous cells is called
Anodizing
The anodize surface on aluminum can produce a high back ground during this nondestructive test
Penetrant PT
