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Steel Making

Ebbw Vale And The Bessemer Process
After his British Association address in August 1856, Besseme...

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

Classifications Of Steel
Among makers and sellers, carbon tool-steels are classed by g...

A Satisfactory Luting Mixture
A mixture of fireclay and sand will be found very satisfactor...

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

Compensating Leads
By the use of compensating leads, formed of the same materia...

Rate Of Cooling
At the option of the manufacturer, the above treatment of gea...

Suggestions For Handling High-speed Steels
The following suggestions for handling high-speed steels are ...

Bessemer Process
The bessemer process consists of charging molten pig iron int...

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

Hardening
The forgings can be hardened by cooling in still air or quen...

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...



Hints For Tool Steel Users






Category: HARDENING CARBON STEEL FOR TOOLS

Do not hesitate to ask for information from the maker as to the
best steel to use for a given purpose, mentioning in as much detail
as possible the use for which it is intended.

Do not heat the steel to a higher degree than that fixed in the
description of each class. Never heat the steel to more than a
cherry red without forging it or giving it a definite heat treatment.
Heating steel at even moderate temperature is liable to coarsen the
grain which can only be restored by forging or by heat treating.

Let the forging begin as soon as the steel is hot enough and never
let tool steel soak in the fire. Continue the hammering vigorously
and constantly, using lighter blows as it cools off, and stopping
when the heat becomes a very dull red or a faint brown.

Should welding be necessary care should be taken not to overheat
in order to make an easy weld. Keep it below the sparkling point
as this indicates that the steel is burnt.

Begin to forge as soon as the welds are put together, taking care
to use gentle strokes at first increasing them as the higher heat
falls, but not overdoing the hammering when the steel cools. The
hammering should be extended beyond the welding point and should
continue until the dull red or brown heat is reached.





Next: Preventing Cracks In Hardening

Previous: Knowing What Takes Place



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