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Standard Analysis
The selection of a standard analysis by the manufacturer is t...

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

Pyrometers For Molten Metal
Pyrometers for molten metal are connected to portable thermoc...

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

Rate Of Cooling
At the option of the manufacturer, the above treatment of gea...

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

The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...

Effect Of Different Carburizing Material
[Illustrations: FIGS. 33 to 37.] Each of these different p...

Phosphorus
Phosphorus is one of the impurities in steel, and it has been...

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

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

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

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

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

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

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

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

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



A Satisfactory Luting Mixture






Category: CASE-HARDENING OR SURFACE-CARBURIZING

A mixture of fireclay and sand will be found very satisfactory
for closing up the boxes, and by observing the appearance of the
work when taken out we can gage the suitability of the methods
employed, for unless the boxes are carefully sealed the work is
generally covered with dark scales, while if properly done the
articles will be of a light gray.

By observing the above recommendations reliable results can be obtained,
and we can expect uniform results after quenching.





Next: Gas Consumption For Carburizing

Previous: Using Illuminating Gas



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