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Steel Making

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

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

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

Hardening
Steel is hardened by quenching from above the upper critical....

Leeds And Northrup Optical Pyrometer
The principles of this very popular method of measuring tempe...

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

Knowing What Takes Place
How are we to know if we have given a piece of steel the ver...

Temperature Recording And Regulation
Each furnace is equipped with pyrometers, but the reading an...

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

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

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

The Effect
The heating at 1,600 deg.F. gives the first heat treatment w...

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

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

Annealing Method
Forgings which are too hard to machine are put in pots with ...

Process Of Carburizing
Carburizing imparts a shell of high-carbon content to a low-...

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

The Influence Of Size
The size of the piece influences the physical properties obta...

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

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



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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