Tempering and stabilization, Mechanical Engineering

Tempering and Stabilization:

Tempering of tool steel in heat treatment is again a significant step. The quenching of such steels reasons the existence of untempered martensite, retained austenite and carbide in the structure. This happen due to finer changes in composition does not permit to found correct austenising temperature. Tempering nears removing such structural deficiencies assist also induce secondary hardness. Following figure shows the secondary hardness presence manifested via increased hardness at specific tempering temperature in the condition of high alloy steels. Both intermediate and high alloy steel reduces in hardness respectively upto about 460oC and 500oC and thereafter they enhance in hardness. High alloy steels illustrate greatest enhance in hardness along with enhancing tempering temperature.

2015_Tempering and Stabilization.png

Figure: Tempering Characteristics of Tool Steels

After tempering primarily the treatment is repeated two or three instance in multi-tempering practice. That treatment stabilizes the microstructure via decreases the amount of retained austenite. Still now another stabilization method is to cool the tempered steel to subzero temperature via placing it in solid carbon dioxide (- 75oC) or dipping it in liquid nitrogen (- 196oC).

Normalized quenched, stabilized and tempered tool steel possesses maximum hardness, dimensional stability and wears resistance.

Posted Date: 2/26/2013 6:45:54 AM | Location : United States







Related Discussions:- Tempering and stabilization, Assignment Help, Ask Question on Tempering and stabilization, Get Answer, Expert's Help, Tempering and stabilization Discussions

Write discussion on Tempering and stabilization
Your posts are moderated
Related Questions
what are the Standard grades of pure iron used for magnetic applications?


Need a basic explanation of how to go about doing a plane strain analysis of a pressure vessel

what are the threats of mechanical engineering ?

Q. Cold service insulation on pipe? Factory fabricated sectional pipe insulation shall be applied in staggered joint construction. On multiple layer construction, all joints sh

An unsymmetrical I-Section as shown in figure below. If maximum bending stress is not extend more than 40MPa in the section than find out the moment which it can bear

A UDL or uniformly distributed load is a load, which is reach over a beam in such a way that every unit length is laded to the similar extent.


Q. Flange Bevel And Lap Ring Weld? The fillet weld attaching the lap ring to the shell shall be an equal leg fillet weld, with the leg dimension equal to the nominal shell thic

Describe vibration and explain different types of vibration. Add following harmonic motions analytically:- X 1 = 4 cos (wt +100) X 2 = 6 sin (wt +600)