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399868

Improving the Performance of Domestic Pin Punches Using Failure Analysis Investigation Techniques

Article

Last updated: 07 Jan 2025

Subjects

-

Tags

Surface Coating Technology

Abstract

The study investigates the failure of locally manufactured pin punches, aiming to identify the factors contributing to these failures and to improve performance and production processes in line with international standards. The target performance benchmarks were 1 million punches for M50 steel (the original material) and 250 thousand punches for D2 steel (an equivalent material), both measured after heat treatment and coating with a TiN layer. Key factors examined in the investigation included excessive pressure, design flaws, material selection, heat treatment, and the machining process. Various analytical techniques, such as chemical analysis, mechanical testing, and imaging methods (including optical and scanning electron microscopy), were employed to analyze the samples. Upon examining the primary samples, mechanical fatigue was identified as the primary failure mechanism. The research involved experimenting with different tool steels and evaluating their performance. The study explored the use of SLIPPNER and D2 steels as alternatives to M50 steel. Initially, controlled heat treatment processes for SLIPPNER were conducted in salt furnaces, followed by machining of the pin punches. This process led to a significant increase in production rates, reaching 140 thousand punches compared to the previous 10 thousand. Subsequently, with D2 steel, a complete change in the heat treatment process, applied in two different methods and followed by controlled finishing, led to remarkable results. The performance improved dramatically, surpassing 1.5 million punches "after heat treatment and without a TiN layer," with the punches still operational to date.

DOI

10.21608/ijmti.2024.331068.1111

Keywords

Failure analysis, Tool steels, Fatigue, Pin punches, Heat treatment

Authors

First Name

Dina

Last Name

Mahmoud

MiddleName

-

Affiliation

Department of Mining, Petroleum, and Metallurgical Engineering, Faculty of Engineering, Cairo University, Cairo, Egypt

Email

dina.202210033@eng-st.cu.edu.eg

City

Cairo

Orcid

-

First Name

Waleed

Last Name

Khalifa

MiddleName

-

Affiliation

Department of Mining, Petroleum, and Metallurgical Engineering, Faculty of Engineering, Cairo University, Cairo, Egypt.

Email

wkhalifa@eng.cu.edu.eg

City

Cairo

Orcid

-

Volume

4

Article Issue

2

Related Issue

52594

Issue Date

2024-12-01

Receive Date

2024-10-24

Publish Date

2024-12-01

Page Start

46

Page End

59

Online ISSN

2682-4299

Link

https://ijmti.journals.ekb.eg/article_399868.html

Detail API

http://journals.ekb.eg?_action=service&article_code=399868

Order

7

Type

Special issue

Type Code

2,428

Publication Type

Journal

Publication Title

International Journal of Materials Technology and Innovation

Publication Link

https://ijmti.journals.ekb.eg/

MainTitle

Improving the Performance of Domestic Pin Punches Using Failure Analysis Investigation Techniques

Details

Type

Article

Created At

07 Jan 2025