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Steel Making

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

Nickel
Nickel may be considered as the toughest among the non-rare a...

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

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

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

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

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

The Influence Of Size
The size of the piece influences the physical properties obta...

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 ve...

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

Surface Carburizing
Carburizing, commonly called case-hardening, is the art of pr...

Tungsten
Tungsten, as an alloy in steel, has been known and used for a...

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

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...

Nickel-chromium
A combination of the characteristics of nickel and the charac...

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

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

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

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...



Preventing Decarbonization Of Tool Steel






Category: HARDENING CARBON STEEL FOR TOOLS

It is especially important to prevent decarbonization in such tools
as taps and form cutters, which must keep their shape after hardening
and which cannot be ground away on the profile. For this reason
it is well to put taps, reamers and the like into pieces of pipe
in heating them. The pipe need be closed on one end only, as the
air will not circulate readily unless there is an opening at both
ends.

Even if used in connection with a blacksmith's forge the lead bath
has an advantage for heating tools of complicated shapes, since
it is easier to heat them uniformly and they are submerged and
away from the air. The lead must be stirred frequently or the heat
is not uniform in all parts of the lead bath. Covering the lead
with powdered charcoal will largely prevent oxidization and waste
of lead.

Such a bath is good for temperatures between 620 and 1,150 deg.F. At
higher temperatures there is much waste of lead.





Next: Annealing To Relieve Internal Stresses

Previous: Steel For Chisels And Punches



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