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Steel Making

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

Molybdenum
Molybdenum steels have been made commercially for twenty-five...

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

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

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

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

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

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

The Care Of Carburizing Compounds
Of all the opportunities for practicing economy in the heat-t...

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

Phosphorus
Phosphorus is one of the impurities in steel, and it has been...

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

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

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

Alloying Elements
Commercial steels of even the simplest types are therefore p...

Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

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

Chromium
Chromium when alloyed with steel, has the characteristic func...

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...



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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