heat treatment shop ppt

1. Department of Mechanical Engineering
PRESENTATION BASED ON SUMMER TRAINING
FROM N.E.R GORAKHPUR
SUBMITTED TO:- SUBMITTED BY:-
MR. SAURABH KUMAR SINGH ANKUR SINGH
MR. VINOD KUMAR GAUTAM ROLL NO-1373640009
MS. PREETI SINGH MECHANICAL
ENGG.
KIYA ENGINEERING COLLEGE AZAMG

2. CONTENTS
 Introduction
 Gorakhpur mechanical workshop
 Heat treatment shop
 Types of heat treatment
 Annealing
 Normalizing
 Hardening and Tempering
 Bogi hearth furnace
 Carburizing
 Advantages of heat treatment
 Applications of heat treatment
 References

3. INDIAN RAILWAY

4. INTRODUCTION
Indian Railways is an Indian state-owned enterprise, owned and
operated by the Government of India through the Ministry of
Railways. It is one of the world's largest railway networks
comprising 115,000 km (71,000 mi) of track over a route of
65,436 km (40,660 mi) and 7,172 stations. Indian Railways is
the world's seventh largest commercial or utility employer, by
number of employees, with over 1.307 million employees. As
for rolling stock, IR holds over 239,281 Freight Wagons,
62,924 Passenger Coaches and 9,013 Locomotives (43 steam,
5,345 diesel and 4,568 electric locomotives). The trains have a
5 digit numbering system and runs 12,617 passenger trains and
7421 freight trains daily

5. HISTORY OF INDIAN RAILWAY
First Indian Railway line was opened on 16th April
1853
The first train consisting of one steam engine and
four coaches , traversed a stretch of 21-miles
between Mumbai(Bombay) and Thane.
Indian Railway has a glorious past of more than150
years serving the nation.

6. GORAKHPUR MECHANICAL WORKSHOP
Gorakhpur workshop was established in 1903 for repair and
overhauling of locomotives, coaches and wagons. There are many
persons employed in workshop for various works. The investment is
done by central government.
Each shop does a specific job. All shop are separately managed by
senior section engineer with the help of junior engineers.
STATISTICS AND SPECIFICATION
 No. of officers -19.
 No. of supervisors-378.

7.  On roll strength- 5282.
 Total area covered-29.8 Hectare.
 Covered area-12.6 Hectare.
 Township area Gorakhpur.

8. LIST OF SHOP
 Machine shop
 Smithy shop
 Welding shop
 Wheel shop
 Bogie shop
 Sheel shop
 Heat treatment shop
 Foundry shop
 Paint shop

9. HEAT TREATMENT SHOP
Heat treatment is the process of heating and cooling of a
material to change its physical and mechanical properties
without changing the original shape and size.
Heat treatment of steel is often associated with increasing its
strength, but can also be used to improve machinability,
formability, restoring ductility, etc.
It is an important operation in the manufacturing process of
many parts tools which imparts mechanical properties of
metals.

10. TYPES OF HEAT TREATMENT
HEAT TREATMENT
BULK SURFACE
ANNEALING
Full Annealing
Recrystallization Annealing
Stress Relief Annealing
Spheroidization Annealing
AUSTEMPERING
THERMAL THERMO-
CHEMICAL
Flame
Induction
Carburizing
Nitriding
Carbo-nitriding
NORMALIZING HARDENING
&
TEMPERING
MARTEMPERING

12. ANNEALING
Annealing consists of heating a metal to a specific temperature and
then cooling at a rate that will produce a refined microstructure.
The rate of cooling is generally slow. Annealing is most often used
to soften a metal for cold working, to improve machinability, or to
enhance properties like electrical conductivity.
Types of annealing:-
Full annealing
Process annealing
Spheroidising
Diffusion annealing

13. NORMALISING
This process is consists of heating the steel 30°C-50°C above its
upper critical temp. It is held at this temp. for about 15min & then
allowed to cool down in still air.
 To refine the grain structure of steel .
 To improve machinability , tensile strength and structure of weld.
 To remove strain caused by cold working process.
 To improve certain mechanical and electrical properties.

14. HARDENING
This process is consists of heating the steel 30C-50C above its upper
critical temp and by the same temp. above the lower critical temp.
Then stay it for considerable time and then cooled suddenly in a
suitable cooling medium.
 To increase the hardness of metals.
 Make it suitable for cutting tools.
TEMPERING
This process is consists of reheating the hardened metals to
some below the lower critical temp.
To reduce brittleness
To increase ductility
To make metal tough to resist shock & fatigue.

15. BOGI HEARTH FURNACE
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16. CARBURIZING
It also referred to as Case Hardening, is a heat treatment
process that produces a surface which is resistant to
wear , while maintaining toughness and strength of core.
It is applied after the machining process.
 For suspension hanger in Indian railway carburizing
take place for 20-22 hour
Pre heat 5.5 hour temp 950 degree
Hold 15.5 hour temp 950 degree

17. BOGI HEARTH FURNACE
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18. ADVANTAGES OF HEAT TREATMENT
 Heat treatment is a way of using controlled heating and
cooling procedure to change physical properties.
 It is used for imparting mechanical properties of the
material.
 Ductility of the material is increased.
 Durability and reliability increased.
 Elastic limit increased.

19. APPLICATIONS
 It is used in all mechanical industries as railways,
aircrafts, automobiles etc.
 It is used for small gears, worm gears, nuts, wheels etc.
 It is used in making machine tools.
 It is used in solidifying paint in metals cans.
 It is used for fixing the range of thermal conductivity.

20. REFERENCES
WEBSITES
http://en.m.wikipedia.org
www.quora.com
www.industrialheating.com
www.slideshare.net
www.scribd.com
BOOKS
Mechanical Engineering (S.CHAND PUBLISHING)
IMAGE RESOURCE
Google images
N.E.R Gorakhpur, Workshop

21. THANK YOU