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Steel Making

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...

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

High Speed Steel
For centuries the secret art of making tool steel was handed ...

Hardening
The forgings can be hardened by cooling in still air or quen...

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

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

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

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

Oil-hardening Steel
Heat slowly and uniformly to 1,450 deg.F. and forge thorough...

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

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...

Carbon Tool Steel
Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham...

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

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

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

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

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



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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