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Steel Making

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

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

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

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

Hardening
The forgings can be hardened by cooling in still air or quen...

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

Conclusions
Martien was probably never a serious contender for the honor ...

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

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...

The Electric Process
The fourth method of manufacturing steel is by the electric f...

Optical System And Electrical Circuit Of The Leeds & Northrup Optical Pyrometer
For extremely high temperature, the optical pyrometer is lar...

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

Lathe And Planer Tools
FORGING.--Gently warm the steel to remove any chill, is parti...

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

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

Effect Of A Small Amount Of Copper In Medium-carbon Steel
This shows the result of tests by C. R. Hayward and A. B. Joh...



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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