VIEW THE MOBILE VERSION of www.steelmaking.ca Informational Site Network Informational
Privacy
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

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

Molybdenum
Molybdenum steels have been made commercially for twenty-five...

Nickel
Nickel may be considered as the toughest among the non-rare a...

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

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

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

Nickel-chromium
A combination of the characteristics of nickel and the charac...

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...

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

Care In Annealing
Not only will benefits in machining be found by careful anne...

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...

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

Connecting Rods
The material used for all connecting rods on the Liberty engi...

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

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

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

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

Annealing Alloy Steel
The term alloy steel, from the steel maker's point of view, r...

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...



Lathe And Planer Tools






Category: HIGH-SPEED STEEL

FORGING.--Gently warm the steel to remove any chill, is particularly
desirable in the winter, then heat slowly and carefully to a scaling
heat, that is a lemon heat (1,800 to 2,000 deg.F.), and forge uniformly.
Reheat the tool for further forging directly the steel begins to
stiffen under the hammer. Under no circumstances forge the steel
when the temperature falls below a dark lemon to an orange color
about 1,700 deg.F. Reheat as often as is necessary to finish forging
the tool to shape. Allow the tool to cool after forging by burying
the tool in dry ashes or lime. Do not place on the damp ground
or in a draught of air.

The heating for forging should be done preferably in a pipe or
muffle furnace but if this is not convenient use a good clean fire
with plenty of fuel between the blast pipe and the tool. Never
allow the tool to soak after the desired forging heat has been
reached. Do not heat the tool further back than is necessary to
shape the tool, but give the tool sufficient heat. See that the
back of the tool is flatly dressed to provide proper support under
the nose of the tool.

HARDENING HIGH-SPEED STEEL.--Slowly reheat the cutting edge of
the tool to a cherry red, 1,400 deg.F., then force the blast so as
to raise the temperature quickly to a full white heat, 2,200 to
2,250 deg.F., that is, until the tool starts to sweat at the cutting
face. Cool the point of the tool in a dry air blast or preferably
in oil, further cool in oil keeping the tool moving until the tool
has become black hot.

To remove hardening strains reheat the tool to from 500 to 1,100 deg.F.
Cool in oil or atmosphere. This second heat treatment adds to the
toughness of the tool and therefore to its life.

GRINDING TOOLS.--Grind tools to remove all scale. Use a quick-cutting,
dry, abrasive wheel. If using a wet wheel, be sure to use plenty
of water. Do not under any circumstances force the tool against
the wheel so as to draw the color, as this is likely to set up
checks on the surface of the tool to its detriment.





Next: For Milling Cutters And Formed Tools

Previous: Cutting-off Steel From Bar



Add to del.icio.us Add to Reddit Add to Digg Add to Del.icio.us Add to Google Add to Twitter Add to Stumble Upon
Add to Informational Site Network
Report
Privacy
SHAREADD TO EBOOK


Viewed 4012