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作为加热速率和失稳温度的函数，分析 HCCI 中的碳化物析出和微观结构演变。

Analysis of the carbide precipitation and microstructural evolution in HCCI as a function of the heating rate and destabilization temperature.

机构信息

Department of Materials Science, Saarland University, Campus D3.3, 66123, Saarbrücken, Germany.

Department of Experimental Physics, Saarland University, Campus D2.2, 66123, Saarbrücken, Germany.

出版信息

Sci Rep. 2023 Jun 12;13(1):9549. doi: 10.1038/s41598-023-36364-1.

DOI:10.1038/s41598-023-36364-1
PMID:37308497
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10261120/
Abstract

Microstructural modification of high chromium cast irons (HCCI) through the precipitation of secondary carbides (SC) during destabilization treatments is essential for improving their tribological response. However, there is not a clear consensus about the first stages of the SC precipitation and how both the heating rate (HR) and destabilization temperature can affect the nucleation and growth of SC. The present work shows the microstructural evolution, with a special focus on the SC precipitation, in a HCCI (26 wt% Cr) during heating up to 800, 900, and 980 °C. It was seen that the HR is the most dominant factor influencing the SC precipitation as well as the matrix transformation in the studied experimental conditions. Finally, this work reports for first time in a systematic manner, the precipitation of SC during heating of the HCCI, providing a further understanding on the early stages of the SC precipitation and the associated microstructural modifications.

摘要

通过在非稳定化处理过程中沉淀次生碳化物 (SC) 来改善高铬铸铁 (HCCI) 的微观结构是至关重要的。然而，对于 SC 沉淀的最初阶段以及加热速率 (HR) 和非稳定化温度如何影响 SC 的形核和生长，目前还没有明确的共识。本工作显示了 HCCI（26wt%Cr）在加热至 800、900 和 980°C 过程中的微观结构演变，特别关注 SC 的沉淀。结果表明，HR 是影响 SC 沉淀以及在所研究的实验条件下基体转变的最主要因素。最后，本工作首次系统地报道了 HCCI 加热过程中 SC 的沉淀，进一步了解了 SC 沉淀的早期阶段及其相关的微观结构变化。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/45d4/10261120/6af17809b670/41598_2023_36364_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/45d4/10261120/b91c58df4bf6/41598_2023_36364_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/45d4/10261120/2c17df804a99/41598_2023_36364_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/45d4/10261120/b8cfe9d7cd5f/41598_2023_36364_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/45d4/10261120/7e483c13d653/41598_2023_36364_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/45d4/10261120/16134393836d/41598_2023_36364_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/45d4/10261120/f4adb0f22b19/41598_2023_36364_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/45d4/10261120/c2b829845d7a/41598_2023_36364_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/45d4/10261120/6af17809b670/41598_2023_36364_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/45d4/10261120/b91c58df4bf6/41598_2023_36364_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/45d4/10261120/2c17df804a99/41598_2023_36364_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/45d4/10261120/b8cfe9d7cd5f/41598_2023_36364_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/45d4/10261120/7e483c13d653/41598_2023_36364_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/45d4/10261120/16134393836d/41598_2023_36364_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/45d4/10261120/f4adb0f22b19/41598_2023_36364_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/45d4/10261120/c2b829845d7a/41598_2023_36364_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/45d4/10261120/6af17809b670/41598_2023_36364_Fig8_HTML.jpg

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本文引用的文献

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