VIEW THE MOBILE VERSION of www.steelmaking.ca Informational Site Network Informational
Privacy
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

Annealing Method
Forgings which are too hard to machine are put in pots with ...

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

Robert Mushet
Robert (Forester) Mushet (1811-1891), born in the Forest of D...

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

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

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Mushet And Bessemer
That Mushet was "used" by Ebbw Vale against Bessemer is, perh...

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

Sulphur
SULPHUR is another element (symbol S) which is always found i...

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

The Modern Hardening Room
A hardening room of today means a very different place from ...

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

Temperature Recording And Regulation
Each furnace is equipped with pyrometers, but the reading an...

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

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

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



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 3741