Method for quantitatively analyzing segregation of sheet material
A quantitative analysis and segregation technology, applied in the direction of analyzing materials, using wave/particle radiation for material analysis, measuring devices, etc. The effect of solving qualitative can not be quantitative, the method is simple and easy to implement, and improving production efficiency
Inactive Publication Date: 2019-07-02
NANJING IRON & STEEL CO LTD
View PDF9 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In the electron microscope analysis, it is often found that due to the severe center segregation, cracks are formed in the center of the steel plate after cooling and phase transformation, resulting in unqualified flaw detection and low impact toughness. , and the industry has never had a specific quantitative standard for the problem of segregation, to what extent will segregation cause quality problems
Because the test adopts the line scanning method, it cannot accurately characterize the segregation of the entire section
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0021] The present embodiment is to analyze with 12MnNiVR as the test sample, and its analysis steps are as follows:
[0022] First, sample preparation steps
[0023] According to the sample preparation requirements of GB / T 4930, the flatness and cleanliness of the sample meet the sample preparation requirements, and the sample is subjected to shallow corrosion, and the organization of the segregated area and the normal area can be distinguished under the microscope. ;
[0024] Second, detection test steps
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for quantitatively analyzing the segregation of a sheet material. The segregation degrees of easily segregated elements of a sheet material sample are studied to obtain an accurate and reliable method to evaluate the segregation degree of the steel plate. With a segregation index, the segregation degrees of elements in the steel plate are evaluated; and specific elements causing the segregation can be accurately determined and the segregation degrees of elements can be calculated quantitatively. Therefore, method has the important reference significance in steel type development and process improvement. The method is simple and is easy to implement and is protected from being affected by human factors. A problem that the detection result can only be evaluated qualitatively cannot be quantitatively in the prior art is solved. Moreover, the rapid optimization of the process for the steel plate production is realized; the production efficiency is improved;and lots of costs are saved for the companies.
Description
technical field [0001] The invention belongs to the technical field of steel detection and relates to a method for quantitatively analyzing steel plate segregation. Background technique [0002] Segregation is a common defect of casting slabs, which is difficult to eliminate during hot rolling and heating, and it is easy to cause serious defects such as banded structure, center segregation, center cracks, and inclusion accumulation exceeding the standard in the finished product. For microalloyed steels, such as microalloyed medium-thick steel plates for ship plates, bridges, containers, and marine facilities, in order to ensure toughness, Z-direction performance, and welding performance, central segregation must be strictly controlled. For pipeline steel plates used for oil and gas transportation, in order to ensure their low-temperature impact toughness, stress corrosion resistance, and HIC resistance, the central segregation of the slab must also be strictly controlled. I...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/225
CPCG01N23/225
Inventor 秦小梅赵亚娟张华伟李平和
Owner NANJING IRON & STEEL CO LTD
PatSnap Eureka turns technology decisions into work you can execute. Powered by our Innovation Knowledge Graph, it runs expert workflows across engineering, life sciences, materials and intellectual property. Get your review-ready output in minutes.
