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Steel Making

Manganese
MANGANESE is a metal much like iron. Its chemical symbol is M...

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

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

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

Crucible Steel
Crucible steel is still made by melting material in a clay or...

Sulphur
Sulphur is another impurity and high sulphur is even a greate...

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

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

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

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

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

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

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

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

Drop Forging Dies
The kind of steel used in the die of course influences the he...

Uses Of The Various Tempers Of Carbon Tool Steel
DIE TEMPER.--No. 3: All kinds of dies for deep stamping, pres...

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

High Speed Steel
For centuries the secret art of making tool steel was handed ...

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

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



Air-hardening Steels






Category: FURNACES

These steels are recommended for boring,
turning and planing where the cost of high-speed seems excessive.
They are also recommended for hard wood knives, for roughing and
finishing bronze and brass, and for hot bolt forging dies. This
steel cannot be cut or punched cold but can be shaped and ground
on abrasive wheels of various kinds.

It should be heated slowly and evenly for forging and kept as evenly
heated at a bright red as possible. It should not be forged after
it cools to a dark red.

After the tool is made, heat it again to a bright red and lay it
down to cool in a dry place or it can be cooled in a cold, dry
air blast. Water must be kept away from it while it is hot.





Next: Typical Oil-fired Furnaces

Previous: Hardening High-speed Steel



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