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Steel Making

Nickel
Nickel may be considered as the toughest among the non-rare a...

Mushet And Bessemer
That Mushet was "used" by Ebbw Vale against Bessemer is, perh...

Bessemer Process
The bessemer process consists of charging molten pig iron int...

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

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...

Heat-treating Department
The heat-treating department occupies an L-shaped building. ...

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

Non-shrinking Oil-hardening Steels
Certain steels have a very low rate of expansion and contract...

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

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

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

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

Oil-hardening Steel
Heat slowly and uniformly to 1,450 deg.F. and forge thorough...

Annealing To Relieve Internal Stresses
Work quenched from a high temperature and not afterward tempe...

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

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

Temperatures To Use
As soon as the temperature of the steel reaches 100 deg.C. (...

Pyrometry And Pyrometers
A knowledge of the fundamental principles of pyrometry, or th...

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

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...



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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