Home Steel Making Categories Manufacturing and the Economy of Machinery

Steel Making

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

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

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

Piston Pin
The piston pin on an aviation engine must possess maximum res...

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...

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

Hardness Testing
The word hardness is used to express various properties of me...

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

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

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

Furnace Data
In order to give definite information concerning furnaces, fu...

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

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

Introduction Of Carbon
The matter to which these notes are primarily directed is the...

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

Although it is possible to work steels cold, to an extent de...

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

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

Carburizing Low-carbon Sleeves


Low-carbon sleeves are carburized
and pushed on malleable-iron differential-case hubs. Formerly,
these sleeves were given two treatments after carburization in
order to refine the case and the core, and then sent to the grinding
department, where they were ground to a push fit for the hubs. After
this they were pushed on the hubs. By the method now employed,
the first treatment refines the core, and on the second treatment,
the sleeves are pushed on the hub and at the same time hardened.
This method cuts out the internal grinding time, pressing on hubs,
and haulage from one department to another. Also, less work is
lost through splitting of the sleeves.

The machine for pushing the sleeves on is shown in Fig. 64. At
A is the stem on which the hot sleeve B is to be pushed. The
carburized sleeves are heated in an automatic furnace, which takes
them cold at the back and feeds them through to the front, by which
time they are at the correct temperature. The loose mandrel C
is provided with a spigot on the lower end, which fits the hole
in the differential-case hub. The upper end is tapered as shown
and acts as a pilot for the ram D. The action of pushing on and
quenching is similar to the action of the Gleason tempering machine,
with the exception that water instead of oil is used as a quenching
medium. The speed of operation depends on a number of variables,
but from 350 to 500 can be heated and pressed on in 11 hr.

Next: Cyanide Bath For Tool Steels

Previous: Hardening Operation

Add to Informational Site Network

Viewed 4632