一种预测切削S32760双相不锈钢时两相显微硬度的新方法。

A new approach to predict microhardness of two-phase in cutting S32760 duplex stainless steel.

作者信息

Zhang Xiangyuan, Yang Lin, Zheng Minli, Liu Jialiang, Zhou Mingjia, Gong Fukang

机构信息

Key Laboratory of Advanced Manufacturing and Intelligent Technology, Ministry of Education, Harbin University of Science and Technology, Harbin, 150080, People's Republic of China.

College of Intelligent Manufacturing Engineering, Harbin Huade University, Harbin, People's Republic of China.

出版信息

Sci Rep. 2023 Oct 13;13(1):17426. doi: 10.1038/s41598-023-44708-0.

DOI:10.1038/s41598-023-44708-0

PMID:37833494

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10576052/

Abstract

The uneven distribution of microhardness in the two-phase structure of S32760 duplex stainless steel after cutting is attributed to variations in the crystal structure, which significantly impact the material's performance. This paper presents a new approach to predict the microhardness of two-phase based on the flow stresses in the austenitic and ferrite. The effect of strain, strain rate, and temperature on the flow stress in the shear plane of orthogonal cutting S32760 was analyzed, and the prediction model for microhardness of two-phase considering the two-phase flow stress was established to obtain a mapping relationship between the two-phase flow stress and the two-phase microhardness of S32760. The impact of cutting dosages on shear strain, strain rate, and temperature in the shear plane was investigated. A function relationship between cutting dosages and microhardness of austenite and ferrite in the shear plane was established, two-phase microhardness experiments were conducted, and the model's accuracy was validated with a prediction error of less than 6%. This study provided insights into the impact of strain, strain rate, and temperature in the shear plane on the microhardness of the two-phase, thus contributing to the theoretical foundation of processing techniques in duplex stainless steel.

摘要

S32760双相不锈钢切削后两相组织中显微硬度分布不均，这归因于晶体结构的变化，这种变化对材料性能有显著影响。本文提出了一种基于奥氏体和铁素体流动应力预测两相显微硬度的新方法。分析了应变、应变速率和温度对S32760正交切削剪切平面内流动应力的影响，建立了考虑两相流动应力的两相显微硬度预测模型，以获得S32760两相流动应力与两相显微硬度之间的映射关系。研究了切削用量对剪切平面内剪切应变、应变速率和温度的影响。建立了切削用量与剪切平面内奥氏体和铁素体显微硬度的函数关系，进行了两相显微硬度实验，验证了模型的准确性，预测误差小于6%。本研究深入了解了剪切平面内的应变、应变速率和温度对两相显微硬度的影响，为双相不锈钢加工工艺的理论基础做出了贡献。