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Steel Making

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

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

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

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

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

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

Case-hardening Treatments For Various Steels
Plain water, salt water and linseed oil are the three most co...

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

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

Pyrometry And Pyrometers
A knowledge of the fundamental principles of pyrometry, or th...

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

Manganese
MANGANESE is a metal much like iron. Its chemical symbol is M...

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

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

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

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

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

Process Of Carburizing
Carburizing imparts a shell of high-carbon content to a low-...

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

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...



Hints For Tool Steel Users






Category: HARDENING CARBON STEEL FOR TOOLS

Do not hesitate to ask for information from the maker as to the
best steel to use for a given purpose, mentioning in as much detail
as possible the use for which it is intended.

Do not heat the steel to a higher degree than that fixed in the
description of each class. Never heat the steel to more than a
cherry red without forging it or giving it a definite heat treatment.
Heating steel at even moderate temperature is liable to coarsen the
grain which can only be restored by forging or by heat treating.

Let the forging begin as soon as the steel is hot enough and never
let tool steel soak in the fire. Continue the hammering vigorously
and constantly, using lighter blows as it cools off, and stopping
when the heat becomes a very dull red or a faint brown.

Should welding be necessary care should be taken not to overheat
in order to make an easy weld. Keep it below the sparkling point
as this indicates that the steel is burnt.

Begin to forge as soon as the welds are put together, taking care
to use gentle strokes at first increasing them as the higher heat
falls, but not overdoing the hammering when the steel cools. The
hammering should be extended beyond the welding point and should
continue until the dull red or brown heat is reached.





Next: Preventing Cracks In Hardening

Previous: Knowing What Takes Place



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