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Steel Making

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

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

SILICON is a very widespread element (symbol Si), being an es...

Annealing Work
With the exception of several of the higher types of alloy s...

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

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

For Milling Cutters And Formed Tools
FORGING.--Forge as before.--ANNEALING.--Place the steel in a ...

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

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

Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

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

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

Care In Annealing
Not only will benefits in machining be found by careful anne...

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

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

Silicon prevents, to a large extent, defects such as gas bubb...

Process Of Carburizing
Carburizing imparts a shell of high-carbon content to a low-...

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

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

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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