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Analytical method for surface adhesion of hot-dip galvanized ultra-high strength steel

A technology of hot-dip galvanizing and ultra-high-strength steel, which is applied in the direction of analysis materials, preparation of test samples, and measuring devices, etc. It can solve problems such as the inability to accurately locate the failure position, achieve rapid and convenient detection, facilitate automation, and improve efficiency. Effect

Active Publication Date: 2019-05-07
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the traditional method cannot accurately locate the failure position, the purpose of the present invention is to overcome the shortcomings of the existing technology, and provide an analysis method for the surface adhesion of hot-dip galvanized ultra-high-strength steel. Accurate positioning and analysis of the failure interface on the surface can realize effective research on the surface adhesion of hot-dip galvanized ultra-high-strength steel, high sample extraction efficiency, flexible methods, and more accurate and rapid detection and analysis

Method used

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  • Analytical method for surface adhesion of hot-dip galvanized ultra-high strength steel
  • Analytical method for surface adhesion of hot-dip galvanized ultra-high strength steel
  • Analytical method for surface adhesion of hot-dip galvanized ultra-high strength steel

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Embodiment 1

[0022] In this embodiment, see Figure 1 ~ Figure 3 , A method for analyzing the adhesion of the surface layer of hot-dip galvanized ultra-high-strength steel. The chemical composition of the base material of hot-dip galvanized ultra-high-strength steel is 0.2C-1.8Si-2.6Mn-Fe (wt%). The cross-section samples analyzed by TEM were preprocessed, torn and sampled using helios600 focused ion beam (FIB) equipment. The steps are as follows:

[0023] Step 1: Take the hot-dip galvanized ultra-high-strength steel as the sample to be tested, and perform the pre-oxidation-reduction annealing process on the sample to be tested, heat it to 800°C at 5°C / s, hold it for 60s, and then cool to 460°C for heating Dip galvanize, take out the sample after 3s and cool it to room temperature to obtain a sample containing galvanized layer;

[0024] Step 2: Place the sample obtained in step 1 in a dual-beam focused ion beam device, deposit Pt protective metal on the surface of the sample, and then stagger t...

Embodiment 2

[0031] This embodiment is basically the same as the first embodiment, and the special features are:

[0032] In this embodiment, a method for analyzing the surface adhesion of hot-dip galvanized ultra-high-strength steel, the chemical composition of the base material of the hot-dip galvanized ultra-high-strength steel is 0.2C-1.8Si-2.6Mn-Fe (wt%), In order to prepare cross-sectional samples for TEM analysis, a helios600 focused ion beam (FIB) equipment was used for pretreatment, tearing and sample extraction. The steps are as follows:

[0033] Step 1: This step is the same as the first embodiment;

[0034] Step 2: Place the annealed sample in a dual-beam focused ion beam device, deposit the chromium protective metal on the surface of the sample, and then stagger the second deposition of metallic chromium so that it extends from the edge of the first layer of chromium 5μm to form the edge of the overhanging metal layer; and set the ion beam voltage of the dual-beam focused ion beam e...

Embodiment 3

[0041] This embodiment is basically the same as the previous embodiment, and the special features are:

[0042] In this embodiment, a method for analyzing the surface adhesion of hot-dip galvanized ultra-high-strength steel, the chemical composition of the base material of the hot-dip galvanized ultra-high-strength steel is 0.2C-1.8Si-2.6Mn-Fe (wt%), In order to prepare cross-sectional samples for TEM analysis, helios600 focused ion beam (FIB) equipment was used to pre-treat, tear and extract samples, which can perform high-throughput detection and performance characterization of batch samples. The method of this embodiment quickly and conveniently performs the detection of the surface layer adhesion of the hot-dip galvanized ultra-high-strength steel, which is convenient for automation and can improve the efficiency of batch detection experiment analysis.

[0043] In summary, the steps of the method for analyzing the adhesion of the surface layer in the hot-dip galvanized ultra-hi...

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Abstract

The invention provides an analytical method for surface adhesion of hot-dip galvanized ultra-high-strength steels. The method comprises the following steps of: providing a hot-dip galvanized high-strength steel substrate, performing a pre-oxidation-reduction annealing treatment and hot-dip galvanizing treatment on a sample; using a dual focused ion beam(FIB) device to deposit a protective metal onthe surface of the sample, and welding a mechanical arm to the surface of the deposited metal to tear a coating; capturing a crack tip region and cutting off the region containing the crack tip; andperforming a component analysis on the sample and observing with a transmission electron microscopy. The method is directed to the surface adhesion analysis of hot-dip galvanized ultra-high-strength steels, can locate failure positions of the coating and analyze the compositions during the preparation of a transmission sample, thereby effectively improving the accuracy of the surface adhesion analysis of the hot-dip galvanized steel. The invention makes flexible improvement on the basis of the existing dual FIB device and does not need to add more experimental steps and experimental costs.

Description

Technical field [0001] The invention relates to a method for testing and analyzing the surface performance of a metal matrix material, in particular to a method for analyzing the failure of a steel coating, which is applied to the technical field of metal testing and analysis. Background technique [0002] In the process of studying the surface quality of hot-dip galvanized ultra-high-strength steel, it is usually necessary to use focused ion beam (FIB) to prepare extremely fine samples for microscopic detection and analysis such as transmission. The FIB dual beam system with electron beam system makes the whole preparation The process is equipped with SEM observation conditions, and the position of the sample taken and the thickness of the prepared sample can be accurately controlled through the dual-beam focused ion beam system. [0003] With the development of the automobile industry, in order to meet the standards of energy saving, environmental protection and safety, the autom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/04G01N1/04G01N1/28
Inventor 王华周翀何燕霖李麟
Owner SHANGHAI UNIV