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Steel Making

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

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

Suggestions For Handling High-speed Steels
The following suggestions for handling high-speed steels are ...

The Quenching Tank
The quenching tank is an important feature of apparatus in c...

Crucible Steel
Crucible steel is still made by melting material in a clay or...

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

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

Steel Can Be Worked Cold
As noted above, steel can be worked cold, as in the case of ...

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

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

Lathe And Planer Tools
TO FORGE.--Gently warm the steel to remove any chill is parti...

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

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

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...

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

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

Case-hardening Treatments For Various Steels
Plain water, salt water and linseed oil are the three most co...

Lathe And Planer Tools
FORGING.--Gently warm the steel to remove any chill, is parti...

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

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



Preparing Parts For Local Case-hardening






Category: CASE-HARDENING OR SURFACE-CARBURIZING

At the works of the Dayton Engineering Laboratories Company, Dayton,
Ohio, they have a large quantity of small shafts, Fig. 40, that
are to be case-hardened at A while the ends B and C are to
be left soft. Formerly, the part A was brush-coated with melted
paraffin but, as there were many shafts, this was tedious and great
care was necessary to avoid getting paraffin where it was not wanted.



To insure uniform coating the device shown in Fig. 41 was made.
Melted paraffin is poured in the well A and kept liquid by setting
the device on a hot plate, the paraffin being kept high enough
to touch the bottoms of the rollers. The shaft to be coated is
laid between the rollers with one end against the gage B, when
a turn or two of the crank C will cause it to be evenly coated.





Next: The Penetration Of Carbon

Previous: Preventing Carburizing By Copper-plating



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