Original scientific paper

https://doi.org/10.64486/m.65.2.6

Influence of Solid Solution Temperature on the Microstructure Evaluation of 15-5PH Stainless Steel for Pipe Organ Rail Rod Applications

Chang Liu ; Harbin University, No.109, Zhongxing Avenue, Nangang District Harbin City, Heilongjiang Province China, 150040
Tian Liu ; Northeast Forestry University, 26 Hexing Rd, Xiangfang District, Harbin, Heilongjiang, China, 150040 *

* Corresponding author.

Abstract

This study investigates the effect of solid solution treatment temperature on the microstructure and mechanical properties of 15-5PH stainless steel, with the aim of optimizing its performance for precision mechanical components. Samples were solution-treated at 975 °C, 1000 °C, 1025 °C, and 1050 °C, followed by aging at 480 °C for 1 h. Microstructural observations revealed progressive grain coarsen-ing with increasing solution temperature. Mechanical testing showed that yield and tensile strengths increased with temperature up to 1025 °C, reaching maxi-mum values of 1390 MPa and 1286 MPa, respectively, due to enhanced dissolu-tion of strengthening phases prior to aging. In contrast, ductility and impact ener-gy decreased consistently with increasing temperature; the highest toughness was obtained at 975 °C (35.5 J), while the lowest values occurred at 1050 °C (6.5 J). The optimal combination of strength and ductility was achieved at 1025 °C, indicating this temperature as the most effective solution-treatment condition for the tested steel. These findings provide a basis for selecting heat-treatment parameters to enhance the performance and reliability of components manufactured from 15-5PH stainless steel.

Keywords

pipe organ rail bar machine; 15-5PH stainless steel; microstructure; mechanical properties

Hrčak ID:

343670

URI

https://hrcak.srce.hr/343670

Publication date:

1.4.2026.

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