A Frenchman once remarked: "The table is the only place where one is not bored for the first hour." Every rose has its thorn There's fuzz on all the peaches. There never was a dinner yet Without some lengthy speeches. ... Read more of AFTER DINNER SPEECHES at Free Jokes.caInformational Site Network Informational
Privacy
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Conclusions
Martien was probably never a serious contender for the honor ...

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

Case-hardening Treatments For Various Steels
Plain water, salt water and linseed oil are the three most co...

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

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

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

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

The Forging Of Steel
So much depends upon the forging of steel that this operation...

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

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

High-chromium Or Rust-proof Steel
High-chromium, or what is called stainless steel containing f...

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

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

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

Corrosion
This steel like any other steel when distorted by cold worki...

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

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

Piston Pin
The piston pin on an aviation engine must possess maximum res...

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

High Speed Steel
For centuries the secret art of making tool steel was handed ...



Annealing Method






Category: HEAT TREATMENT OF STEEL

Forgings which are too hard to machine are put
in pots with a little charcoal to cause a reducing atmosphere and
to prevent scale. The covers are then luted on and the pots placed
in the furnace. Carbon steel from 15 to 25 points is annealed at
1,600 deg.F. Nickel steel of the same carbon and containing in addition
3-1/2 per cent nickel is annealed at 1,450 deg.F. When the pots are
heated through, they are rolled to the yard and allowed to cool.
This method of annealing gives the best hardness for quick machining.

The requirements in the machine operations are very rigid and, in
spite of great care and probably the finest equipment of special
machines in the world, a small percentage of the product fails
to pass inspection during or at the completion of the machine
operations. These pieces, however, are not a loss, for they play
an important part in the hardening process, indicating as they do
the exact depth of penetration of the carburizing material and
the condition of both case and core.





Next: Heat-treating Department

Previous: Heat-treating Equipment And Methods For Mass Production



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 3982