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Steel Making

Effect Of Different Carburizing Material
[Illustrations: FIGS. 33 to 37.] Each of these different p...

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

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

Preventing Cracks In Hardening
The blacksmith in the small shop, where equipment is usually ...

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

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

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

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

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

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

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

Crucible Steel
Crucible steel is still made by melting material in a clay or...

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

Temperature Recording And Regulation
Each furnace is equipped with pyrometers, but the reading an...

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

Molybdenum
Molybdenum steels have been made commercially for twenty-five...

Leeds And Northrup Optical Pyrometer
The principles of this very popular method of measuring tempe...

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



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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