Method for detecting solid-phase reaction between inclusions and alloy matrix in thermal treatment process

Abstract

The invention provides a method for detecting solid-phase reaction between inclusions and an alloy matrix in a thermal treatment process. On the one hand, the limitation that the solid-phase reaction between the inclusions and the alloy matrix can not be clearly observed due to too small size of the inclusions is broken through, on the other hand, the situation of an interface between the inclusions and the alloy matrix and the influence of the solid-phase reaction between the inclusions and the alloy matrix on components, natures and physical phases of the inclusions and the alloy matrix are disclosed. The method integrates a high-temperature confocal laser microscope pre-melting process, a quartz tube sealing process, a thermal treatment process and the like, detects the solid-phase reaction and a reaction mechanism between a Fe-Mn-Si steel matrix alloy and MnO-SiO2-FeO-MnS series inclusions in the thermal treatment process at the temperature of 1473K to verify that the technology can be used for effectively reflecting the solid-phase reaction and the reaction mechanism between the non-metallic inclusions and the steel matrix and has an important experimental and production guide effect and good application and popularization prospects.

Description

technical field [0001] The invention belongs to the technical field of steelmaking technology and provides a method for detecting the solid phase reaction between inclusions and alloy matrix in the heat treatment process. Background technique [0002] In the alloy production process, the type, quantity, size, morphology and physical and chemical properties of inclusions formed in the alloy matrix after heat treatment and rolling processes directly affect the quality and performance of alloy products, and such inclusions There are often large differences from the inclusions initially present in the alloy liquid before solidification. One of the main reasons is that the subsequent heat treatment process experienced by the alloy matrix can not only change the structure and properties of the metal material, but also affect the internal Influenced by inclusions, solid-state secondary oxidation reactions easily occur between solid metal materials and inclusions, resulting in segre...

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Problems solved by technology

[0003] In the actual production process of alloy products, in many cases, it is precisely because of the solid phase reaction between the inclusions and the alloy matrix during the heat treatment process that the overall toughness, fatigue resistance and ductility of the alloy matrix are destroyed, causing quality problems for alloy products. damage

Generally, EPMA or SEM-EDS and other methods are used to directly observe and analyze the changes in the morphology and composition of inclusions during heat treatment. However, due to the extremely small size of inclusions, the solid phase between inclusions and alloy matrix The changes brought about by the reaction are often difficult to detect, and the current research in this field at home and abroad mainly focuses on the change of the characteristics of the inclusions themselves during the heat treatment process. There are very few studies on the impact of this application, and after searching and comparing domestic and foreign databases, no method or technology identical or similar to this patented technology has been found.

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