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Hardness Testing
The word hardness is used to express various properties of me...

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

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

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

Air-hardening Steels
These steels are recommended for boring, turning and planing...

A Satisfactory Luting Mixture
A mixture of fireclay and sand will be found very satisfactor...

Impact Tests
Impact tests are of considerable importance as an indication ...

Crankshaft
The crankshaft was the most highly stressed part of the entir...

Machineability
Reheating for machine ability was done at 100 deg. less than ...

Sulphur
Sulphur is another impurity and high sulphur is even a greate...

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

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

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

William Kelly's Air-boiling Process
An account of Bessemer's address to the British Association w...

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

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

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...



Cyanide Bath For Tool Steels






Category: HEAT TREATMENT OF STEEL

All high-carbon tool steels are
heated in a cyanide bath. With this bath, the heat can be controlled
within 3 deg. The steel is evenly heated without exposure to the
air, resulting in work which is not warped and on which there is no
scale. The cyanide bath is, of course, not available for high-speed
steel because of the very high temperatures necessary.





Next: Drop Forging Dies

Previous: Carburizing Low-carbon Sleeves



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