Informational Site NetworkInformational Site Network
Privacy
 
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...

Pyrometry And Pyrometers
A knowledge of the fundamental principles of pyrometry, or th...

Drop Forging Dies
The kind of steel used in the die of course influences the he...

Corrosion
This steel like any other steel when distorted by cold worki...

Heat-treating Department
The heat-treating department occupies an L-shaped building. ...

Manganese
MANGANESE is a metal much like iron. Its chemical symbol is M...

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

Connecting Rods
The material used for all connecting rods on the Liberty engi...

Effect Of Different Carburizing Material
[Illustrations: FIGS. 33 to 37.] Each of these different p...

Annealing
ANNEALING can be done by heating to temperatures ranging from...

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

Introduction Of Carbon
The matter to which these notes are primarily directed is the...

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

Hardening High-speed Steels
We will now take up the matter of hardening high-speed steels...

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

The Influence Of Size
The size of the piece influences the physical properties obta...

The Electric Process
The fourth method of manufacturing steel is by the electric f...

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...



Restoring Overheated Steel






Category: HARDENING CARBON STEEL FOR TOOLS

The effect of heat treatment on overheated steel is shown graphically
in Fig. 65 to the series of illustrations on pages 137 to 144. This
was prepared by Thos. Firth & Sons, Ltd., Sheffield, England.



The center piece Fig. 65 represents a block of steel weighing about
25 lb. The central hole accommodated a thermo-couple which was attached
to an autographic recorder. The curve is a copy of the temperature
record during heating and cooling. Into the holes in the side of
the block small pegs of overheated mild steel were inserted. One
peg was withdrawn and quenched at each of the temperatures indicated
by the numbered arrows, and after suitable preparation these pegs
were photographed in order to show the changes in structure taking
place during heating and cooling operations. The illustrations here
reproduced are selected from those photographs with the object
of presenting pictorially the changes involved in the refining of
overheated steel or steel castings.





Next: Hardening Carbon Steel For Tools

Previous: S A E Heat Treatments



Add to del.icio.us Add to Reddit Add to Digg Add to Del.icio.us Add to Google Add to Twitter Add to Stumble Upon
Add to Informational Site Network
Report
Privacy
SHAREADD TO EBOOK


Viewed 4086