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Steel Making

Impact Tests
Impact tests are of considerable importance as an indication ...

Quenching
It is considered good practice to quench alloy steels from th...

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...

Furnace Data
In order to give definite information concerning furnaces, fu...

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

Surface Carburizing
Carburizing, commonly called case-hardening, is the art of pr...

The Thermo-couple
With the application of the thermo-couple, the measurement of...

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

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

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

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

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

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

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

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

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

Hardness Testing
The word hardness is used to express various properties of me...

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

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



Heat Treatment Of Steel






Category: HEAT TREATMENT OF STEEL

Heat treatment consists in heating and cooling metal at definite
rates in order to change its physical condition. Many objects may
be attained by correct heat treatment, but nothing much can be
expected unless the man who directs the operations knows what is
the essential difference in a piece of steel at room temperature
and at a red heat, other than the obvious fact that it is hot. The
science of metallography has been developed in the past 25 years,
and aided by precise methods of measuring temperature, has done
much to systematize the information which we possess on metallic
alloys, and steel in particular.





Next: Critical Points

Previous: Blending The Compound



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