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Steel Making

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

Air-hardening Steels
These steels are recommended for boring, turning and planing...

Separating The Work From The Compound
During the pulling of the heat, the pots are dumped upon a ca...

Conclusions
Martien was probably never a serious contender for the honor ...

Preventing Cracks In Hardening
The blacksmith in the small shop, where equipment is usually ...

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

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

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

Heat Treatment Of Gear Blanks
This section is based on a paper read before the American Gea...

The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...

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

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

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

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

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

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



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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