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Steel Making

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

Judging The Heat Of Steel
While the use of a pyrometer is of course the only way to hav...

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

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

Care In Annealing
Not only will benefits in machining be found by careful anne...

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

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

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

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

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

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

Corrosion
This steel like any other steel when distorted by cold worki...

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

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...

Annealing
ANNEALING can be done by heating to temperatures ranging from...

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

Silicon
Silicon prevents, to a large extent, defects such as gas bubb...

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

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...



Heat Treatment Of Milling Cutters Drills Reamers Etc






Category: HIGH-SPEED STEEL

THE FIRE.--Gas and electric furnaces designed for high heats are
now made for treating high-speed steels. We recommend them for
treating all kinds of Blue Chip tools and particularly the above
class. After tools reach a yellow heat in the forge fire they must
not be allowed to touch the fuel or come in contact with the blast
or surrounding air.

HEATING.--Tools of this kind should be heated to a mellow white
heat, or as hot as possible without injuring the cutting edges
(2,000 to 2,200 deg.F.). For most work the higher the heat the better
the tool. Where furnaces are used, we recommend preheating the
tools to a red heat in one furnace before putting them in a white
hot furnace.

COOLING.--We recommend quenching all of the above tools in oil
when taken from the fire. We have found fish oil, cottonseed oil,
Houghton's No. 2 soluble oil and linseed oil satisfactory. The
high heat is the important thing in hardening Blue Chip tools.
If a white hot tool is allowed to cool in the open air it will be
hard, but the air scales the tool.

DRAWING THE TEMPER.--Tools of this class should be drawn considerably
more than water-hardening steel for the same purpose.





Next: Heat Treatment Of Punches And Dies Shears Taps Etc

Previous: Heat Treatment Of Lathe Planer And Similar Tools



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