高温下高强度钢丝的热物理性质

IF 3.4 3区 工程技术 Q2 ENGINEERING, CIVIL Fire Safety Journal Pub Date : 2024-04-19 DOI:10.1016/j.firesaf.2024.104165
Zhi Liu , Guo-Qiang Li
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引用次数: 0

摘要

本文通过实验研究了广泛应用于基础设施的高强度钢丝(HSSW)的热物理性质,以填补设计标准和火灾中电缆性能研究方面的知识空白。在 20 至 800 °C 的温度下,测量了强度分别为 1670、1860、1960 和 2160 兆帕的高强度钢丝试样的质量密度、比热容和热导率。结果表明,与一般热轧结构钢相比,1960 和 2160 级高速钢的比热容在 400 至 700 °C 之间明显较低,其峰值出现在较高温度下。高速钢的热导率明显低于热轧钢。这些测得的高速钢在高温下的热物理性能为未来的传热研究和火灾中结构电缆的安全评估奠定了重要的材料基础。
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Thermophysical properties of high–strength steel wires at high temperatures

This paper experimentally investigates the thermophysical properties of high–strength steel wires (HSSWs) that are widely used in infrastructures to fill this knowledge gap in design standards and studies on the performance of cables in fires. The mass densities, specific heat capacities, and thermal conductivities of HSSW specimens with strengths of 1670, 1860, 1960, and 2160 MPa were measured at temperatures from 20 to 800 °C. Results show that compared with general hot-rolled structural steels, the specific heat capacity of grade 1960 and 2160 HSSWs is observably lower between 400 and 700 °C, and its peaks occur at higher temperatures. The thermal conductivity of HSSW steels is appreciably below that of hot-rolled steels. These measured thermophysical properties of HSSWs at high temperatures lay a critical material-level foundation for future heat transfer studies and safety evaluation of structural cables in fires.

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来源期刊
Fire Safety Journal
Fire Safety Journal 工程技术-材料科学:综合
CiteScore
5.70
自引率
9.70%
发文量
153
审稿时长
60 days
期刊介绍: Fire Safety Journal is the leading publication dealing with all aspects of fire safety engineering. Its scope is purposefully wide, as it is deemed important to encourage papers from all sources within this multidisciplinary subject, thus providing a forum for its further development as a distinct engineering discipline. This is an essential step towards gaining a status equal to that enjoyed by the other engineering disciplines.
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