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Thermal Measurement during High-Velocity Oxy-Fuel Coating Process for Single and Multiple Pass Rotational Spraying

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Abstract:

High-velocity oxy-fuel spraying is a widely used thermal spray technology for producing dense and wear-resistant coatings. The thermal input during spraying strongly influences coating microstructure, residual stress state, and substrate integrity. In this work, in situ thermal measurements were performed on S235 substrates during High-velocity oxy-fuel deposition of 316L coatings. Two spraying strategies were compared: (i) single-pass rotation and (ii) multi-pass rotation. Thermocouples embedded at 1.8mm depth captured transient temperature responses, revealing significant thermal cycling effects. Single-pass operations produced no significant heating–cooling cycles, while multi-pass strategies led to thermal accumulation and overlapping cycles. The results provide reference data for the calibration of finite element heat source models and support the development of process–structure–property relationships in High-velocity oxy-fuel coatings.

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Info:

Periodical:

Key Engineering Materials (Volume 1047)

Pages:

205-212

Online since:

April 2026

Authors:

George Diyoke*, Yitong Yang, Christoph Schindelbacher, Sebastian Sperling, Jürgen Angerler, Sebastian Härtel

Keywords:

Coating Process, Heat Source, High-Velocity Oxy-Fuel, Thermal Measurements

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Creative Commons CC BY 4.0

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* - Corresponding Author

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