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Steel Making

Surface Carburizing
Carburizing, commonly called case-hardening, is the art of pr...

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

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

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

Critical Points
One of the most important means of investigating the properti...

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

Carbon Tool Steel
Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham...

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

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

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

Effects Of Proper Annealing
Proper annealing of low-carbon steels causes a complete solu...

The Care Of Carburizing Compounds
Of all the opportunities for practicing economy in the heat-t...

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...

Bessemer Process
The bessemer process consists of charging molten pig iron int...

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

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

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

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

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

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...



Quenching The Work






Category: CASE-HARDENING OR SURFACE-CARBURIZING

In some operations case-hardened work is quenched from the box by
dumping the whole contents into the quenching tank. It is common
practice to leave a sieve or wire basket to catch the work, allowing
the carburizing material to fall to the bottom of the tank where it
can be recovered later and used again as a part of a new mixture.
For best results, however, the steel is allowed to cool down slowly
in the box after which it is removed and hardened by heating and
quenching the same as carbon steel of the same grade. It has absorbed
sufficient carbon so that, in the outer portions at least, it is
a high-carbon steel.





Next: The Quenching Tank

Previous: Effect Of Different Carburizing Material



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