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Uses Of The Various Tempers Of Carbon Tool Steel
DIE TEMPER.--No. 3: All kinds of dies for deep stamping, pres...

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

Heat Treatment Of Gear Blanks
This section is based on a paper read before the American Gea...

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

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

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

Application To The Automotive Industry
The information given on the various parts of the Liberty eng...

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

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

Steel Can Be Worked Cold
As noted above, steel can be worked cold, as in the case of ...

Annealing Alloy Steel
The term alloy steel, from the steel maker's point of view, r...

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

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

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

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

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

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

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

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



Heat Treatment Of Lathe Planer And Similar Tools






Category: HIGH-SPEED STEEL

FIRE.--For these tools a good fire is one made of hard foundry
coke, broken in small pieces, in an ordinary blacksmith forge with
a few bricks laid over the top to form a hollow fire. The bricks
should be thoroughly heated before tools are heated. Hard coal
may be used very successfully in place of hard coke and will give
a higher heat. It is very easy to give Blue Chip the proper heat
if care is used in making up the fire.

FORGING.--Heat slowly and uniformly to a good forging heat. Do
not hammer the steel after it cools below a bright red. Avoid as
much as possible heating the body of the tool, so as to retain
the natural toughness in the neck of the tool.

HARDENING.--Heat the point of the tool to an extreme white heat
(about 2,200 deg.F.) until the flux runs. This heat should be the highest
possible short of melting the point. Care should be taken to confine
the heat as near to the point as possible so as to leave the annealing
and consequent toughness in the neck of the tool and where the tool
is held in the tool post.

COOL in an air blast, the open air or in oil, depending upon the
tools or the work they are to do.

For roughing tools temper need not be drawn except for work where
the edge tends to crumble on account of being too hard.

For finishing tools draw the temper to suit the purpose for which
they are to be used.

GRIND thoroughly on dry wheel (or wet wheel if care is used to prevent
checking).





Next: Heat Treatment Of Milling Cutters Drills Reamers Etc

Previous: Lathe And Planer Tools



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