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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

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

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

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

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

Annealing
There is no mystery or secret about the proper annealing of d...

Non-shrinking Oil-hardening Steels
Certain steels have a very low rate of expansion and contract...

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

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

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...

Quenching The Work
In some operations case-hardened work is quenched from the bo...

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

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

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

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

Carbon In Tool Steel
Carbon tool steel, or tool steel as it is commonly called, us...

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

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

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

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



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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