Studies on Formation Mechanism of In Situ Particles During Laser Direct Deposition of Fe-Based Composite Coatings with Valence Electron Structure Parameters

被引：4
作者：
Yin, Guili [1 ,2 ]
Chen, Suiyuan [1 ]
Liang, Jing [1 ]
Liu, Changsheng [1 ]
Wang, Mei [3 ]
机构：
[1] Northeastern Univ, Key Lab Laser Applicat Technol & Equipment Liaoni, Key Lab Anisotropy & Texture Mat, Minist Educ,Sch Mat & Engn, Shenyang 110819, Liaoning, Peoples R China
[2] Liaoning Univ Technol, Sch Mat Sci & Engn, Jinzhou 121001, Peoples R China
[3] Shenyang Dalu Laser Technol Co Ltd, Shenyang 110819, Liaoning, Peoples R China
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2019年 / 50A卷 / 06期
基金：
国家重点研发计划;
关键词：
SURFACE-ENERGY; ALLOY ELEMENTS; 1ST PRINCIPLES; STABILITY; 1ST-PRINCIPLES; DENSITY; METALS; PHASE; TRANSFORMATION; SIMULATION;
D O I：
10.1007/s11661-019-05203-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, the formation regularity of C-Cr, C-Fe, and C-Fe-Cr in situ particles during the laser direct deposition of Fe-based composite coatings was theoretically investigated using the phase stability (PS) and phase formation ability (PFA) calculated based on the empirical electron theory of solids and molecules (EET). The calculation results showed that Cr7C3, Cr3C2, and Fe3C are more likely to appear during the laser direct deposition of Fe-based composite coatings because they have ideal PS and PFA values in comparison with Cr3C, Cr23C6, Fe7C3, Fe23C6, and Fe4C compounds. The addition of Cr is beneficial for the formation of (Fe, Cr)(3)C compounds when the Cr substitution ratio of Fe atoms is within 33.3 pct, whereas it is easier for the (Cr, Fe)(7)C-3 and Cr7C3 compounds to appear in the alloy coatings when the Cr substitution ratio of Fe atoms is greater than 57.1 pct. These investigation results will provide theoretical guidance for the composition design and performance optimization of in situ particle-reinforced Fe-based composite coatings. (C) The Minerals, Metals & Materials Society and ASM International 2019
引用
收藏
页码：2599 / 2612
页数：14
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