Resulting structure of steel, Mechanical Engineering

Assignment Help:

Resulting structure of steel:

Heat treatments as mentioned below are given to thin steel strips for which TTT diagram is as shown in Figure 19. What will be the resulting structure of steel in each case.

Treatments

1.      Water quench to room temperature.

2.      Hot quench in molten salt to 690oC hold for 2 hours and water quench.

3.      Hot quench to 610oC & hold 3 minutes, water quench.

4.      Hot quench to 580oC, hold for 25 minutes, water quench

5.      Hot quench to 450oC, hold for 1 hour, water quench

6.      Hot quench to 300oC, hole for 30 minutes, water quench

7.      Hot quench to 300oC, hold for 5 hours, water quench

Solution

From Figure 19 the final structures of steel can be determined

1.      Martensite

2.      Coarse pearlite

3.      Fine pearlite

4.      50% fine pearlite and 50% martensite

5.      Bainite

6.      50% fine bainite and 50% martensite

7.      Fine bainite

1898_Resulting structure of steel.png

Figure: Cooling Scheme of Example


Related Discussions:- Resulting structure of steel

Other bearing materials, Other Bearing Materials An extensively hard w...

Other Bearing Materials An extensively hard wood of great density, termed as lignum vitae, has been employed for bearing applications. Along with water as cooling and lubrican

Objectives of general safety and service tips , Objectives After study...

Objectives After studying this general safety and services tips, you should be able to appreciate the importance of safety precautions, accomplish the servicing wo

Vectors, Resolving vectors into I j k component

Resolving vectors into I j k component

Determine the change in pressure rise through the compressor, We have a rec...

We have a reciprocating compressor operating at 800 rpm.  Suction pressure and discharge pressure are held constant by other systems that have nothing to do with the compressor.  W

Determine moment of this normal force - rectangular beam, Determine moment ...

Determine moment of this normal force - rectangular beam: A rectangular beam contains a width of 100 mm and a depth of 200 mm. This is utilized as a simply supported beam & th

Special casting methods, Special Casting Methods: 1. Die casting : D...

Special Casting Methods: 1. Die casting : Die casting is a permanent mould casting techniques in which molten metal is forced in the mould cavity under a pressure of 700 to

Explain the creation phase of radial drilling machine, Explain the Creation...

Explain the Creation Phase of radial drilling machine Objective:  "To generate alternative methods for providing the function, through creative thinking, brainstorming and

Blade tips with burrs, Industrial had been producing various types of medic...

Industrial had been producing various types of medical products. One of the manufacture lines is Blade Department. Recently we had received a complained from Headquarter regarding

Shm, How we say that motion of the follower is simple harmonic motion descr...

How we say that motion of the follower is simple harmonic motion describe in practical approch

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd