Deforming a metal plastically at a temperature below its lowest recrystallization temperature. Strain hardening occurs as a result of this permanent deformation.
What is cold working
100
Reducing the diameter of wire or bar stock by pulling through successively smaller dies.
What is Drawing?
100
This is strongest in the direction of rolling.
What is Rolled steel?
100
The quality of material such that it can be deformed without breaking.
What is Plasticity?
100
A process of forming metals while they are heated above the recrystallization or transformation temperatures.
What is hot working
200
Also called strain hardening and cold working, in which the grains become distorted and elongated in the direction of working (e.g., rolling).
What is Work hardening?
200
The operation of cutting a shape with a die from sheet metal stock. The hole material is saved and used for further operations
What is Blanking?
200
The extrusion of extra material in die casting dies, forging dies, or plastic injection molding dies along the parting line.
What is Flash?
200
A material that has specific physical properties in different directions.
What is Anisotropy
200
A process in which the distorted grain structure of metals that are subjected to mechanical deformation is replaced by a new strain-free grain structure during annealing.
What is Recrystallization
300
The tendency for a metal part to return (or relax) somewhat from the form to which it has been bent or deformed when the forces causing the change in form are removed.
What is Elastic recovery- or springback?
300
The operation of cutting a hole in sheet metal using a die.
The hole material is scrapped.
What is Punching?
300
The property of materials to not deform under load but to break suddenly.
What is Brittleness?
300
A method of metalworking in which the metal is hammered into the desired shape, or is forced into a mold by pressure or hammering, usually after being heated to a plastic state.
What is Forging?
300
Usually under high pressure and at elevated temperatures, forcing materials through a die containing the shape desired so that a shaped product is produced.
What is Extrusion?
400
Stresses induced within the structure of a metal by cold working, machining, and heat treatments and remaining in the metal after the treatment is completed
What is Residual stress?
400
Shaping a piece of metal in a mold or die, often creating raised figures or numbers.
What is Coining?
400
The metal is enclosed in a container with inert gas to avoid scaling and then heated to its recrystallizing temperature.
What is Bright anneal?
400
The process of increasing the cross section of stock at the expense of its length.
What is Upset forging?
400
In general, the heating of metal to soften it or reduce its strength.
What is to Anneal?
500
The relaxation and reduction of locked-in internal stresses in cold-worked metals.
What is Recovery?
500
A process in which metal parts are dipped in acid for the purpose of cleaning and etching prior to plating, painting, or further cold working.
What is Pickling?
500
The reduction of residual stress in a metal part by heating it to a given temperature and holding it there for a suitable length of time.
What is Stress relief anneal?
500
Compacting or necking down metal bars or tubes by hammering or rotary forming.
What is Swaging?
500
Also called smith forging. In this process a drop hammer delivers blows of great force to a heated metal that is shaped by manipulating it under the hammer.
Daily Double