热处理对低碳结构钢09Mn2Si中MnS化合物形成的影响

IF 0.4 Q4 METALLURGY & METALLURGICAL ENGINEERING Obrabotka Metallov-Metal Working and Material Science Pub Date : 2022-12-15 DOI:10.17212/1994-6309-2022-24.4-113-126
R. Sokolov, V. Novikov, Ilja Kovenskij, K. Muratov, Anatoli Z. Venediktov, L. Chaugarova
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引用次数: 0

摘要

介绍钢的性能由许多因素决定,包括制造过程和随后的处理。这些工艺的一些特点导致了这样一个事实,即在钢中,除了添加合金元素以获得一定水平的物理和机械性能外,还存在在不同阶段进入钢中的外来杂质。外来元素不仅可以溶解在基体中,还可以参与非金属夹杂物颗粒的形成,起到缺陷的作用。它的存在会显著影响材料的性能特征。这就是为什么有必要了解导致非金属夹杂物出现并影响其形状的过程。目的:考虑导致铁素体-马氏体结构出现的热处理对非金属夹杂物形状和尺寸的影响;以确定其对材料的物理和机械性能的影响。本文对09Mn2Si轧制钢热处理后的试样进行了研究。研究方法。为了研究09Mn2Si钢的性能和结构,使用了以下方法:扫描电子显微镜——研究材料的结构、局部和研究部位的化学成分,并测定杂质的积累;SIAMS 800软件和硬件复合体-将材料的结构与微观结构图谱进行比较,以确定晶粒结构的分数、热处理过程中出现的结构和相组成的差异;便携式金属和合金X射线荧光分析仪X-MET 7000-以百分比形式测定所研究样品的化学成分;预载荷为20kg的维氏硬度计——用于测量所研究样品的硬度。结果和讨论。研究发现,在低合金低碳结构钢09Mn2Si中,大多数情况下都存在硫化锰型非金属夹杂物。当这种钢被加热到临界间转变的温度时,这种化合物以球形夹杂物的形式在晶界区域形成。这些夹杂物的存在显著影响强度和腐蚀性能。硫化锰作为腐蚀过程的起始点。
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The effect of heat treatment on the formation of MnS compound in low-carbon structural steel 09Mn2Si
Introduction. The properties of steels are determined by many factors, including the manufacturing process and subsequent treatment. Some features of these processes lead to the fact that in steel, apart from alloying elements added to obtain a certain level of physical and mechanical properties, there are also foreign impurities that enter it at various stages. Foreign elements can not only dissolve in the matrix, but also participate in the formation of particles of nonmetallic inclusions acting as defects. Its presence significantly affects the performance characteristics of the material. That is why it is necessary to understand the processes that lead to the appearance of nonmetallic inclusions and affect its shape. Purpose: to consider the effect of heat treatment, leading to the appearance of a ferrite-martensitic structure, on the shape and size of nonmetallic inclusions; to determine its influence on the physical and mechanical properties of the material. In the work, samples of rolled steel 09Mn2Si after heat treatment are studied. Research methods. To study the properties and structure of steel 09Mn2Si, the following methods were used: scanning electron microscopy – to study the structure of the material, chemical composition in the local area and the site under study and to determine the accumulation of impurities; SIAMS 800 software and hardware complex – to compare the structure of the material with the atlas of microstructures, to determine the score of the grain structure, differences in the structural and phase composition occurring during heat treatment; portable X-ray fluorescence analyzer of metals and alloys X-MET 7000 - to determine the chemical composition of the samples under study in percentage terms; Vickers hardness tester with a preload of 20 kg – to measure the hardness of the samples under study. Results and discussions. It is found that in the low-alloy low-carbon structural steel 09Mn2Si in most cases there are nonmetallic inclusions of the type of manganese sulfide formed during its manufacture. When this steel is heated to the temperatures of the intercritical transition, this compound is formed in the area of grain boundaries in the form of spherical inclusions. The presence of these inclusions significantly affects the strength and corrosion properties. Manganese sulfide acts as the point of the corrosion process initiation.
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来源期刊
Obrabotka Metallov-Metal Working and Material Science
Obrabotka Metallov-Metal Working and Material Science METALLURGY & METALLURGICAL ENGINEERING-
CiteScore
1.10
自引率
50.00%
发文量
26
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