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

doi:10.20057/j.1003-8620.2024-00008

Abstract

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%.

Key words: 3Al-310S Stainless, Solution Treatment Processes, Microstructure, Mechanlcal Properties

摘要： 通过向普通310S不锈钢中添加3%Al制得3Al-310S耐热不锈钢，试验钢经过不同固溶工艺处理后，采用X射线衍射（XRD）、扫描电镜（SEM）、透射电镜（TEM）及室温拉伸性能测试，研究固溶工艺对3Al-310S耐热钢显微组织和力学性能的影响规律。结果表明，3Al-310S耐热钢基体组织为奥氏体，随着固溶时间的增加和固溶温度的提高，3Al-310S耐热钢的晶粒尺寸逐渐增大；同时相对应的3Al-310S板材的硬度和抗拉强度逐渐降低，伸长率逐渐提高，当固溶温度为1 000 ℃，固溶时间为10 min时，试验钢的抗拉强度达618.75 MPa，伸长率为33.80%。

关键词: 3Al-310S耐热钢, 固溶工艺, 显微组织, 力学性能

CLC Number:

TG142.71

Zhang　Yanmei, Yu　Haicun, Qiu　Qiuling. Effect of Solid Solution Process on the Organization and Mechanical Properties of 3Al-310S Heat-resistant Steel[J]. Special Steel, 2024, 45(6): 95-101.

张艳梅, 余海存, 仇秋玲. 固溶工艺对3Al-310S耐热钢组织和力学性能的影响[J]. 特殊钢, 2024, 45(6): 95-101.

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