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Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

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

Gas Consumption For Carburizing
Although the advantages offered by the gas-fired furnace for ...

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

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

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

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...

Carburizing By Gas
The process of carburizing by gas, briefly mentioned on page ...

Oil-hardening Steel
Heat slowly and uniformly to 1,450 deg.F. and forge thorough...

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

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

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

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

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

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

Mushet And Bessemer
That Mushet was "used" by Ebbw Vale against Bessemer is, perh...

Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

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

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



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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