Effect of Solid Solution Process on the Organization and Mechanical Properties of 3Al-310S Heat-resistant Steel

Abstract

This article prepares 3Al-310S heat-resistant stainless steel by adding 3% Al to ordinary 310S stainless steel. After different solid solution processes， the experimental steel is subjected to X-ray diffraction （XRD）， scanning electron microscopy （SEM）， transmission electron microscopy （TEM）， and room temperature tensile performance testing to study the influence law of solid solution processes on the microstructure and mechanical properties of 3Al-310S heat-resistant steel. The research results indicate that the matrix structure of 3Al-310S heat-resistant steel is austenite. With the extension of solution time and the increase of solution temperature， the grain size of 3Al-310S heat-resistant steel gradually increases. With the increase of solution time and solution temperature， the hardness and tensile strength of 3Al-310S plate gradually decrease， and the elongation gradually increases. Among them， when the solution temperature is 1 000 ℃ and the solution time is 10 minutes， the tensile strength of the experimental steel reaches 618.75 MPa， and the elongation is 33.80%.

Keywords

• 3al-310s stainless； solution treatment processes； microstructure； mechanlcal properties