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Steel Making

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

Conclusions
Martien was probably never a serious contender for the honor ...

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

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

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

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

Ebbw Vale And The Bessemer Process
After his British Association address in August 1856, Besseme...

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

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

Quenching The Work
In some operations case-hardened work is quenched from the bo...

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

Effect Of A Small Amount Of Copper In Medium-carbon Steel
This shows the result of tests by C. R. Hayward and A. B. Joh...

Annealing
There is no mystery or secret about the proper annealing of d...

Care In Annealing
Not only will benefits in machining be found by careful anne...

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

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

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

William Kelly's Air-boiling Process
An account of Bessemer's address to the British Association w...

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...



Non-shrinking Oil-hardening Steels






Category: ALLOYS AND THEIR EFFECT UPON STEEL

Certain steels have a very low rate of expansion and contraction
in hardening and are very desirable for test plugs, gages, punches
and dies, for milling cutters, taps, reamers, hard steel bushings
and similar work.

It is recommended that for forging these steels it be heated slowly
and uniformly to a bright red, but not in a direct flame or blast.
Harden at a dull red heat, about 1,300 deg.F. A clean coal or coke
fire, or a good muffle-gas furnace will give best results. Fish
oil is good for quenching although in some cases warm water will
give excellent results. The steel should be kept moving in the bath
until perfectly cold. Heated and cooled in this way the steel is
very tough, takes a good cutting edge and has very little expansion
or contraction which makes it desirable for long taps where the
accuracy of lead is important.

The composition of these steels is as follows:

Per cent
Manganese 1.40 to 1.60
Carbon 0.80 to 0.90
Vanadium 0.20 to 0.25





Next: Effect Of A Small Amount Of Copper In Medium-carbon Steel

Previous: Properties Of Alloy Steels



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