The Effect of Hot-Mounting on the Microstructure of an As-Quenched Auto-Tempered Low-Carbon Martensitic Steel

被引：10
|
作者：
Babu, Shashank Ramesh [1 ]
Jaskari, Matias [2 ]
Jarvenpaa, Antti [2 ]
Porter, David [1 ]
机构：
[1] Univ Oulu, Mat & Mech Engn, Ctr Adv Steels Res, Oulun 90014, Finland
[2] Univ Oulu, Kerttu Saalasti Inst, Pajatie 5, FI-85500 Nivala, Finland
来源：
METALS | 2019年 / 9卷 / 05期
基金：
欧盟地平线“2020”;
关键词：
hot-mounting; martensite; tempering; quenching; cementite; LATH MARTENSITE; MECHANICAL-PROPERTIES; PRECIPITATION; TOOLS;
D O I：
10.3390/met9050550
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of hot-mounting for metallographic studies of as-quenched low-carbon martensitic steels has been studied. Hot-mounting is typically carried out at 150-200 degrees C, i.e., a low-temperature tempering regime. Cold- and hot-mounted specimens from an as-quenched low-carbon auto-tempered steel were examined using a scanning electron microscope and their hardness levels were also compared. It was found that hot-mounting causes additional tempering that manifests as the appearance of new precipitates in those regions that are free of auto-tempered cementite. The observations were rationalized using DICTRA simulations to calculate the potential growth of cementite. Hot-mounting was also shown to cause a small but statistically significant increase in the hardness of the martensite.
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收藏
页数：9
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