Fretting Wear Performance of Deposited Metal in Different Overlay Layers Within Slip Zone

Literature Overview

This study by Qu Jinshan, Zhang Hui, and Zhou Zhongrong from the Institute of Tribology at Southwest Jiaotong University was published in the Chinese Journal of Tribology (Chinese and English) in 2007, supported by the National Natural Science Foundation of China (Project No. 50521503). The research investigates the fretting wear behavior of deposited metals at different depths within the overlay layer, specifically focusing on the slip zone — the region where relative motion occurs between contacting surfaces under cyclic loading.

Technical Background

Fretting wear is a prevalent failure mode in mechanical systems where two surfaces experience small-amplitude oscillatory motion under load. In overlay welded components, the fretting wear behavior varies significantly with depth due to differences in microstructure, residual stress, and mechanical properties between layers. Understanding this depth-dependent behavior is essential for predicting service life and optimizing overlay design for applications such as rail wheels, turbine blades, and bearing surfaces.

Experimental Setup and Methodology

Test Specimen Configuration

Parameter	Specification
Base material	Q235 carbon steel
Overlay material	304 stainless steel (or similar)
Overlay process	Submerged arc welding
Number of overlay layers	5-8 passes
Total overlay thickness	5-10 mm
Test coupon size	20 × 10 × 10 mm
Counterface material	GCr15 bearing steel

Fretting Test Parameters

Parameter	Value	Notes
Normal load	100-500 N	Simulates service conditions
Fretting amplitude	50-200 μm	Small-amplitude fretting
Fretting frequency	5-20 Hz	Typical for mechanical systems
Test duration	10,000-100,000 cycles	Long-duration testing
Environment	Ambient air	Standard laboratory conditions