中碳低合金钢奥氏体回火过程中零件尺寸对微观结构的影响

IF 1.9 3区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

steel research international Pub Date : 2024-08-05 DOI:10.1002/srin.202400090

Priya Tiwari, Abhinav Varshney

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引用次数: 0

摘要

在这项工作中，研究了奥氏体回火过程中零件尺寸对低合金钢微观结构的影响。不同直径（5 至 16 毫米）的 0.41C-0.24Si-0.63Mn-0.93Cr 钢在 350 °C 下奥氏体回火 10 分钟。尽管奥氏体回火条件相似，但随着试样直径的增加，针状/多边形铁素体的尺寸和比例都有所增加。根据实验观察和基于多维瞬态传热分析的分析计算，奥氏体回火过程中的冷却速度随着样品直径的减小而增加。铁素体晶粒大小和组分的变化是由于不同尺寸的试样在奥氏体回火过程中遇到的冷却速率不同造成的。由于奥氏体回火过程中冷却速率的变化，实验和理论估算的铁素体晶粒大小非常接近。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Influence of Part Size on Microstructure during Austempering of Medium Carbon Low‐Alloy Steels

In this work, the influence of part dimensions on the microstructure of low‐alloy steel during its austempering has been studied. 0.41C‐0.24Si‐0.63Mn‐0.93Cr steel of different diameters ranging from 5 to 16 mm has been austempered at 350 °C for 10 min. Despite similar austempering conditions, an increase in the size and fraction of acicular/polygonal ferrite has been noted with an increase in the diameter of the samples. From the experimental observations and analytical calculations based on multi‐dimensional transient heat transfer analysis, the cooling rate during austempering has been observed to increase with a decrease in the sample diameter. Variation in ferrite grain size and fraction is due to different cooling rates encountered by different sized specimens during austempering. Close agreement between the experimental and theoretically estimated ferrite grain size due to variation in cooling rate during austempering has been noted.

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来源期刊

steel research international 工程技术-冶金工程

CiteScore

3.30

自引率

18.20%

发文量

319

审稿时长

1.9 months

期刊介绍： steel research international is a journal providing a forum for the publication of high-quality manuscripts in areas ranging from process metallurgy and metal forming to materials engineering as well as process control and testing. The emphasis is on steel and on materials involved in steelmaking and the processing of steel, such as refractories and slags. steel research international welcomes manuscripts describing basic scientific research as well as industrial research. The journal received a further increased, record-high Impact Factor of 1.522 (2018 Journal Impact Factor, Journal Citation Reports (Clarivate Analytics, 2019)). The journal was formerly well known as "Archiv für das Eisenhüttenwesen" and "steel research"; with effect from January 1, 2006, the former "Scandinavian Journal of Metallurgy" merged with Steel Research International. Hot Topics: -Steels for Automotive Applications -High-strength Steels -Sustainable steelmaking -Interstitially Alloyed Steels -Electromagnetic Processing of Metals -High Speed Forming