Liquid cementation

Liquid cementation

 

 

Annotation

In this article we consider the process of carburizing in a liquid medium parts reclamation machines

 

The purpose of the grouting 
To increase the hardness and wear resistance parts

 

The conventional thermal treatment for hardening does not alter the chemical composition of steel, ie, the material starts treatment with 0.4% carbon and it ends with 0.4% carbon. However, sometimes it is necessary to bring the steel to complete modifications on their chemical composition to improve the properties of its surface. These changes are obtained through thermo-chemical treatment. This treatment aims primarily to increase the hardness and strength of the material wear of the surface and at the same time maintaining the core ductile (soft) and tenacious.

 

What is Cementation?

The cementation consists in introducing larger quantities of carbon in steel surfaces with low carbon contents. Therefore, it is indicated for mild steel or alloy steel when the original carbon is less than 0.25%. Cementation increases this level up to values around 1%, ensuring hard surfaces and a tougher core.

Parts made of steel with medium or high percentage of carbon that will suffer severe bending operations, tend to crack. However, if they are made with low carbon steel (for example, SAE 1010) and then are shaped and cemented, its possible to have a good result without the pieces run the risk of cracking. The cementation can be performed in solid, gaseous or liquid methods.

 

 

 

In this article, we look pro-grouting in a liquid medium

Liquid Cementation

In this process molten salts rich in carbon are used, mainly based on the salts of cyanide and carbonate. The temperature has to be 930 ° C to 950 ° C because the salts become liquid at this temperature, with the initial melting around 650 ° C.

 

Cementation Today

Currently the process of cement is considered obsolete and is no longer widely used, although it is still used in parts such as axles and cams.

 

 

 

 

 

 

 

Literature

 

“Heat Treatment and Properties of Iron and Steel”

UNITED STATES DEPARTMENT OF COMMERCE

Thomas G. Digges, Samuel J. Rosenberg, and Glenn W. Geil

 

“Fundamentals of the Heat Treating of Steel”

ASM International

 

“Properties, Identification and Heat Treatment of Metals General”

Detroit Machine Tools

http://www.longwood.edu

 

 

 

 

 

 

http://www.brighthubengineering.com/manufacturing-technology/50978-thermochemical-treatments-cementation/

 

ASM International, Materials Park, Ohio, USA

www.asminternational.org

 

http://heatbath.com/

 

http://www.pg.gda.pl

 

http://nationalheattreat.com/

 

http://chromin.nl/Treatments/borizing