Loughborough University
Browse

Improvement of wear resistance for engine valve: introducing cold upsetting treatment on valve seating face

journal contribution
posted on 2025-01-29, 17:21 authored by Fuqiang Lai, Changsheng Cao, Chuangwei Shi, Ge Sun, Rong Qu, Dongqiang Mo, Youxi Lin, Shengguan Qu, Roger Lewis, Tom SlatterTom Slatter, Xin Xue
This study presents a new surface strengthening technique (cold upsetting manufacturing process) for engine valve seating face (VSF). The properties of the Ni30 superalloy VSF were characterized before and after cold upsetting. Compared to the solution-aging treatment (SAT) valve, the solution-cold upsetting-aging treatment (SCUAT) valve hardness was increased by 60 HV0.2. SCUAT valves exhibited higher internal dislocation degrees and local misorientation than SAT valves. Bench-top wear tests at 650 °C and 750 °C were conducted. The valve wear loss at 650 °C was higher than that at 750 °C. SCUAT valves show better wear resistance, with a total wear loss reduction up to 26.76 %. The SCUAT valve-seat insert contact pair wear mechanisms are adhesive and fatigue wear.

Funding

National Natural Science Foundation of China (Grant No.52205185 and No.12272094)

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Wear

Volume

564-565

Issue

2024

Publisher

Elsevier

Version

  • AM (Accepted Manuscript)

Rights holder

© Elsevier

Publisher statement

This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

2024-12-04

Publication date

2024-12-05

Copyright date

2024

ISSN

0043-1648

eISSN

1873-2577

Language

  • en

Depositor

Prof Tom Slatter. Deposit date: 27 January 2025

Article number

205693