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Steel Making

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

Nickel-chromium
A combination of the characteristics of nickel and the charac...

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

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

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

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

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

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

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

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...

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

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

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

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

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

Piston Pin
The piston pin on an aviation engine must possess maximum res...

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...

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

The Influence Of Size
The size of the piece influences the physical properties obta...

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



Tempering Round Dies






Category: HARDENING CARBON STEEL FOR TOOLS

A number of circular dies of carbon tool steel for use in tool
holders of turret lathes were required. No proper tempering oven
was available, so the following method was adopted and proved quite
successful.

After the dies had been hardened dead hard in water, they were
cleaned up bright. A pair of ordinary smiths' tongs was made with
jaws of heavy material and to fit nicely all around the outside of
the die, leaving a 3/32-in. space when the jaws were closed around
the die. The dies being all ready, the tongs were heated red hot, and
the dies were picked up and held by the tongs. This tempered them
from the outside in, left the teeth the temper required and the
outside slightly softer. The dies held up the work successfully
and were better than when tempered in the same bath.





Next: The Effect Of Tempering On Water-quenched Gages

Previous: Shrinking And Enlarging Work



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