球形一铝化镍粉生产过程中形状和结构缺陷的形成分析

IF 0.4 Q4 METALLURGY & METALLURGICAL ENGINEERING
M. V. Zharov
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引用次数: 0

摘要

分析了单铝镍NiAl颗粒在生产球形颗粒的各种工艺过程中出现的缺陷。从生产优质原料的角度出发,对生产颗粒的工艺流程进行了研究。确定了生产单铝化镍NiAl颗粒的质量标准。它们包括具有内部孔隙和其他形状缺陷的颗粒的最少数量,颗粒的高球形度,颗粒尺寸的高稳定性,颗粒表面没有卫星,颗粒材料的精细枝晶结构的存在,等等。从生产高质量原料的角度出发,研究了几种制备单铝化镍NiAl颗粒的方法。研究了冷却强度和颗粒凝固速率对材料结构分散的影响,确定了旋转电极离心喷涂的最佳工艺参数,以保证生产高质量的颗粒。提出了一种开发和试验的高质量球形NiAl材料粉末生产技术。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Analysis of the Formation of Shape and Structure Defects in Spherical Nickel Monoaluminide NiAl Powders during Their Production

Analysis of the Formation of Shape and Structure Defects in Spherical Nickel Monoaluminide NiAl Powders during Their Production

The appearance of defects in nickel monoaluminide NiAl granules during various processes of production of spherical granules is analyzed. The technological processes of producing granules are considered from the point of view of manufacturing high-quality raw materials. Quality criteria for producing nickel monoaluminide NiAl granules are determined. They include the minimum number of granules with internal porosity and other shape defects, high sphericity of particles, high stability of the particle sizes, the absence of satellites on the granules surface, the presence of a fine dendritic structure of the granule material, and so on. Several methods for producing nickel monoaluminide NiAl granules were investigated from the point of view of producing high-quality raw materials. The influence of cooling intensity and granule solidification rates on the dispersion of the material structure and the optimum parameters of centrifugal spraying of a rotating electrode, which ensure the production of high-quality granules, are determined. A developed and tested technology for producing a high-quality spherical NiAl material powder is proposed.

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来源期刊
Russian Metallurgy (Metally)
Russian Metallurgy (Metally) METALLURGY & METALLURGICAL ENGINEERING-
CiteScore
0.70
自引率
25.00%
发文量
140
期刊介绍: Russian Metallurgy (Metally)  publishes results of original experimental and theoretical research in the form of reviews and regular articles devoted to topical problems of metallurgy, physical metallurgy, and treatment of ferrous, nonferrous, rare, and other metals and alloys, intermetallic compounds, and metallic composite materials. The journal focuses on physicochemical properties of metallurgical materials (ores, slags, matters, and melts of metals and alloys); physicochemical processes (thermodynamics and kinetics of pyrometallurgical, hydrometallurgical, electrochemical, and other processes); theoretical metallurgy; metal forming; thermoplastic and thermochemical treatment; computation and experimental determination of phase diagrams and thermokinetic diagrams; mechanisms and kinetics of phase transitions in metallic materials; relations between the chemical composition, phase and structural states of materials and their physicochemical and service properties; interaction between metallic materials and external media; and effects of radiation on these materials.
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