Martempering, Mechanical Engineering

Martempering:

The piece to be hardened is wholly austenitized and after that quenched in a lead of salt bath held at a temperature simply above at that martensite would begin to form. This is maintained at this temperature till its temperature becomes uniform throughout that is inside and outside temperatures do not stay different and is after that water quenched to form entire bainite formation and martensite structure is prevented. From the austenite-martensite expansions such procedure successfully separates the cooling contraction and hence prevents quench cracking in large articles. The procedure of martempering is illustrated in following figure.

1780_Martempering.png

Figure: Martempering represented on the TTT Curve

The steel can be tempered to low temperatures for additionally refine the structure.

Table no. illustrates a few properties obtained from martemper, austemper and quenchtemper treatments.

Heat Treatment

Hardness

(Rc )

Impact

(J)

Elongation % (on 25 min gl)

Water quench, Temper

53.0

8.22

0

Water quench, Temper

52.5

9.60

0

Martemper, Temper

53.0

19.20

0

Martemper, Temper

52.8

16.44

0

Austemper

52.0

30.83

11

Posted Date: 2/26/2013 6:16:14 AM | Location : United States







Related Discussions:- Martempering, Assignment Help, Ask Question on Martempering, Get Answer, Expert's Help, Martempering Discussions

Write discussion on Martempering
Your posts are moderated
Related Questions
Codes and Standards for steam generator All equipment purchased, and installation work done, shall be in accordance with the: • Canadian Electrical Code • Alberta Electri

Overhead Bridge Crane Figure below shows a jib crane. In this type of crane the hook can move in a circular path. A jib crane is preferred where lifting of the jobs is requ

Describe the use of computer in : (i) Design (ii) Manufacturing Illustrate the design process and application of CAD.

What can a valve do?  It can prevent flow (on/off), allow variable control of the flow and provide a safe working environment. What sort of questions should we be asking when selec

Application of Hydrostatic sensor paver machine The Hydrostatic sensor paver machine that is used for lying bituminous Mixed material, roll-down or lean-mixed concrete, track-

Predictive Control Algorithms Escaping Scheduling Errors via Partial Look-ahead Since previously mentioned above, the heuristic priority rules that are normally utilized in

aframe of punching machine and its varios dimentions. if it has force of85kN determine others

A hermite curve passes through the points (1,0), (0.866, 0.5), (0.5, 0.866), (0,1) which are parameterized at u=0,0.25,0.75,1 respectively. determine geometric coefficient of the c

Q. Alloy materials control? All low alloy and high alloy equipment components including fittings, flanges and sections of pipe and all welds shall be individually tested by Ven

i need the micro etrusion process,how it is done