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

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

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

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

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

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

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

Application To The Automotive Industry
The information given on the various parts of the Liberty eng...

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

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

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

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

Knowing What Takes Place
How are we to know if we have given a piece of steel the ver...

A Satisfactory Luting Mixture
A mixture of fireclay and sand will be found very satisfactor...

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

Critical Points
One of the most important means of investigating the properti...

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

Annealing Method
Forgings which are too hard to machine are put in pots with ...



Heating Of Manganese Steel






Category: FURNACES

Another form of heat-treating furnace
is that which is used for the heating of manganese and other alloy
steels, which after having been brought to the proper heat are drawn
from the furnace into an immediate quenching tank. With manganese
steel in particular, the parts are so fragile and easily damaged
while hot that it is frequent practice to have a sloping platform
immediately in front of the furnace door down which the castings
may slide into a tank below the floor level. Such a furnace with
a quenching tank in front of its door is shown in Fig. 108.

These tanks are covered with plates while charging the furnace
and the cold castings are placed in a moderately cool furnace.
Since some of these steels must not be charged into a furnace where
the heat is extreme but should be brought up to their final heat
gradually, there is little discomfort during the charging process.
When quenching, however, from a temperature of 1,800 deg. to 1,900 deg.,
it is extremely unpleasant in front of the doors. The swinging
shield is here adapted to give protection for this work. As will
be noted it is hung a sufficient distance in front of the doors,
that it may not interfere with the castings as they come from the
furnace, and slide down into the tank.

To facilitate the work, and avoid the necessity of working with
the bars outside the edges of the shield, the slot-like hole is
cut in the center of the shield, and through this the bars or rakes
for dragging out the castings are easily inserted and manipulated.
The advantage of such a swinging shield is that it may be readily
moved from side to side, or forward and back as occasion requires.





Next: Furnace Data

Previous: Flange Shields For Furnaces



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