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Steel Making

The Quenching Tank
The quenching tank is an important feature of apparatus in c...

The crankshaft was the most highly stressed part of the entir...

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

Chromium when alloyed with steel, has the characteristic func...

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

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

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

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

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

Alloying Elements
Commercial steels of even the simplest types are therefore p...

Hardness Testing
The word hardness is used to express various properties of me...

Critical Points
One of the most important means of investigating the properti...

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

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

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

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

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

Steel Can Be Worked Cold
As noted above, steel can be worked cold, as in the case of ...

High-chromium Or Rust-proof Steel
High-chromium, or what is called stainless steel containing f...

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

Hints For Tool Steel Users


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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