Optimization of quenching process in hot stamping of boron alloyed steel

This thesis explained the effect of quenching process parameters in hot press forming that has been used in automotive industry to manufacture metallic parts with high specific strengths. Optimum cooling system need to be considered during the quenching process in hot stamping to achieve the highest...

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Main Author:	Mohd Nazeri, Mohd Annuar
Format:	Undergraduates Project Papers
Language:	English
Published:	2013
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://umpir.ump.edu.my/id/eprint/8465/ http://umpir.ump.edu.my/id/eprint/8465/ http://umpir.ump.edu.my/id/eprint/8465/1/cd8170.pdf

id	oai:umpir.ump.edu.my:8465
recordtype	eprints
spelling	oai:umpir.ump.edu.my:84652015-11-13T02:07:13Z http://umpir.ump.edu.my/id/eprint/8465/ Optimization of quenching process in hot stamping of boron alloyed steel Mohd Nazeri, Mohd Annuar TA Engineering (General). Civil engineering (General) This thesis explained the effect of quenching process parameters in hot press forming that has been used in automotive industry to manufacture metallic parts with high specific strengths. Optimum cooling system need to be considered during the quenching process in hot stamping to achieve the highest strength. The material that had been used in this hot press forming process was boron alloyed steel (22MnB5) that will produce the highest martensite content after being hot stamped. After being heated in the furnace up to 950 0C until 10 minutes, the specimens were pressed at 40 bar by using the hydraulic power press and quenched. The investigations were studied on the microstructure and its hardness properties. Every specimen was prepared for the mechanical testing. To get the optimum parameters, ANOVA were used by using the full factorial design. The responses were studied on hardness value. The result shows that by increasing the quenching time and flow rate will increase the hardness value of the specimen while lowering the coolant temperature will increase the hardness value. The heat transfers by conduction were optimum during the pressure holding time process so the optimum cooling systems hardly effect the formation of the blank. The value of hardness are directly proportional with the formation of martensitic microstructure but it was impossible to achieve a fully martensite structure after the blank being hot stamped. The formation of martensite was due to the heating of the blank until its austenite phase and rapid cooling that make the carbon atom stretch along one direction. Besides martensite structure, the formation of bainite and retained austenite structure also appeared after the blank being hot stamped. to achieve an optimum hardness value up to 551.3 HV0.5, the specimen should be quenched at 7 second with the flow rate of 40 L/min and coolant temperature of 27 0C. 2013-07 Undergraduates Project Papers NonPeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/8465/1/cd8170.pdf Mohd Nazeri, Mohd Annuar (2013) Optimization of quenching process in hot stamping of boron alloyed steel. Faculty of Mechanical Engineering, Universiti Malaysia Pahang. http://iportal.ump.edu.my/lib/item?id=chamo:82945&theme=UMP2
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Mohd Nazeri, Mohd Annuar Optimization of quenching process in hot stamping of boron alloyed steel
description	This thesis explained the effect of quenching process parameters in hot press forming that has been used in automotive industry to manufacture metallic parts with high specific strengths. Optimum cooling system need to be considered during the quenching process in hot stamping to achieve the highest strength. The material that had been used in this hot press forming process was boron alloyed steel (22MnB5) that will produce the highest martensite content after being hot stamped. After being heated in the furnace up to 950 0C until 10 minutes, the specimens were pressed at 40 bar by using the hydraulic power press and quenched. The investigations were studied on the microstructure and its hardness properties. Every specimen was prepared for the mechanical testing. To get the optimum parameters, ANOVA were used by using the full factorial design. The responses were studied on hardness value. The result shows that by increasing the quenching time and flow rate will increase the hardness value of the specimen while lowering the coolant temperature will increase the hardness value. The heat transfers by conduction were optimum during the pressure holding time process so the optimum cooling systems hardly effect the formation of the blank. The value of hardness are directly proportional with the formation of martensitic microstructure but it was impossible to achieve a fully martensite structure after the blank being hot stamped. The formation of martensite was due to the heating of the blank until its austenite phase and rapid cooling that make the carbon atom stretch along one direction. Besides martensite structure, the formation of bainite and retained austenite structure also appeared after the blank being hot stamped. to achieve an optimum hardness value up to 551.3 HV0.5, the specimen should be quenched at 7 second with the flow rate of 40 L/min and coolant temperature of 27 0C.
format	Undergraduates Project Papers
author	Mohd Nazeri, Mohd Annuar
author_facet	Mohd Nazeri, Mohd Annuar
author_sort	Mohd Nazeri, Mohd Annuar
title	Optimization of quenching process in hot stamping of boron alloyed steel
title_short	Optimization of quenching process in hot stamping of boron alloyed steel
title_full	Optimization of quenching process in hot stamping of boron alloyed steel
title_fullStr	Optimization of quenching process in hot stamping of boron alloyed steel
title_full_unstemmed	Optimization of quenching process in hot stamping of boron alloyed steel
title_sort	optimization of quenching process in hot stamping of boron alloyed steel
publishDate	2013
url	http://umpir.ump.edu.my/id/eprint/8465/ http://umpir.ump.edu.my/id/eprint/8465/ http://umpir.ump.edu.my/id/eprint/8465/1/cd8170.pdf
first_indexed	2018-09-07T01:07:44Z
last_indexed	2018-09-07T01:07:44Z
_version_	1610908921833193472

Optimization of quenching process in hot stamping of boron alloyed steel

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