VIEW THE MOBILE VERSION of Informational Site Network Informational
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

The Forging Of Steel
So much depends upon the forging of steel that this operation...

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

Standard Analysis
The selection of a standard analysis by the manufacturer is t...

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

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

Manganese adds considerably to the tensile strength of steel,...

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

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

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

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

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

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

Separating The Work From The Compound
During the pulling of the heat, the pots are dumped upon a ca...

Robert Mushet
Robert (Forester) Mushet (1811-1891), born in the Forest of D...

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...

Phosphorus is one of the impurities in steel, and it has been...

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

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

Take Time For Hardening


Uneven heating and poor quenching has
caused loss of many very valuable dies, and it certainly seems
that when a firm spends from $75 to $450 in cutting a die that
a few hours could be spared for proper hardening. But the usual
feeling is that a tool must be hurried as soon as the hardener
gets it, and if a burst die is the result from either uneven or
overheated steel and quenching same without judgment, the steel
gets the blame.

Give the steel a chance to heat properly, mix a little common sense
with your 30 years experience on the other fellows steel. Remember
that high-carbon steel hardens at a lower heat than low-carbon
steel, and quench when at the right heat in the two above ways,
and 99 per cent of the trouble will vanish.

When a die flies to pieces in quenching, don't rush to the
superintendent with a poor-steel story, but find out first why it
broke so that the salesman who sold it will not be able to harden
piece after piece from the same bar satisfactorily. If you find
a cold short, commonly called a pipe, you can lay the blame
on the steelmaker. If it is a case of overheating and quenching
when too hot, you will find a coarse grain with many bright spots
like crystals to the hardening depth. If uneven heating is the
cause, you will find a wider margin of hardening depth on one side
than on the other, or find the coarse grain from over-heating on
one side while on the other you will find a close grain, which
may be just right. If you find any other faults than a pipe,
or are not able to harden deep enough, then take the blame like
a man and send for information. The different steel salesmen are
good fellows and most of them know a thing or two about their own

For much work a cooling bath at from 50 to 75 deg.F. is very good both
for small hobs, dies, cutter plates or plungers. Some work will
harden best in a barrel of brine, but in running cold water, splendid
results will be obtained. Cutter plates should always be dipped
corner first and if any have stripper holes, they should first
be plugged with asbestos or fire clay cement.

In general it may be said that the best hardening temperature for
carbon steel is the lowest temperature at which it will harden

Next: Carbon In Tool Steel

Previous: The Modern Hardening Room

Add to Add to Reddit Add to Digg Add to Add to Google Add to Twitter Add to Stumble Upon
Add to Informational Site Network

Viewed 3102