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Steel Making

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

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

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

Optical System And Electrical Circuit Of The Leeds & Northrup Optical Pyrometer
For extremely high temperature, the optical pyrometer is lar...

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

The Effect
The heating at 1,600 deg.F. gives the first heat treatment w...

The Forging Of Steel
So much depends upon the forging of steel that this operation...

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

Standard Analysis
The selection of a standard analysis by the manufacturer is t...

Lathe And Planer Tools
FORGING.--Gently warm the steel to remove any chill, is parti...

Lathe And Planer Tools
TO FORGE.--Gently warm the steel to remove any chill is parti...

Carbon In Tool Steel
Carbon tool steel, or tool steel as it is commonly called, us...

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

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

There is no mystery or secret about the proper annealing of d...

Furnace Data
In order to give definite information concerning furnaces, fu...

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

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

Composition And Properties Of Steel
It is a remarkable fact that one can look through a dozen tex...

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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