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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Silicon
SILICON is a very widespread element (symbol Si), being an es...

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

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

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

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

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

Machineability
Reheating for machine ability was done at 100 deg. less than ...

Compensating Leads
By the use of compensating leads, formed of the same materia...

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

Annealing
ANNEALING can be done by heating to temperatures ranging from...

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

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

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

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

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

Calibration Of Pyrometer With Common Salt
An easy and convenient method for standardization and one whi...

Gas Consumption For Carburizing
Although the advantages offered by the gas-fired furnace for ...

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

Mushet And Bessemer
That Mushet was "used" by Ebbw Vale against Bessemer is, perh...

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



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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