scholarly journals Effects of Cold Rolling Annealing Process on Corrosion Resistance of Semi-process Electrical Steel of Middle and Low Grades

2021 ◽  
Vol 2044 (1) ◽  
pp. 012064
Author(s):  
Feng Zhou ◽  
Shunqiang Yao ◽  
Qing Zhou
Keyword(s):  
Corrosion Resistance ◽  
Cold Rolling ◽  
Electrical Steel ◽  
Annealing Process

Comprised of the Organization and Performance of Non-Oriented Electrical Steel with Cold and Heat Slab

2016 ◽  
Vol 852 ◽  
pp. 181-186
Author(s):  
Tie Ye ◽  
Zhen Yu Gao ◽  
Zhi Wen Lu ◽  
Zhi Guo Zhong
Keyword(s):  
Grain Size ◽  
Magnetic Properties ◽  
Cold Rolling ◽  
Electrical Steel ◽  
Annealing Process ◽  
Rolled Plate ◽  
Continuous Annealing ◽  
Production Test ◽  
Second Phase ◽  
Hot Rolled

The structure, texture, second phase and magnetic properties of non-oriented electrical steel with cold and heat slab were comprised through the production test. The research result shows that the grain size of hot rolled plate by cold slab is less than that of hot rolled plate by hot slab. But after cold rolling and annealing process, the grain size is consistent. Microstructure of hot rolled coil is recrystallized microstructure and the dispersion degree of texture orientation is high. Deformation makes the texture enhancement in cold rolling which become the strong texture based on {001} {111} and <110> texture. The Ti element has aggregation which can form hard impurities as TiN and TiSN to obstruct the recrystallization. Micro fine TiC formed in the annealing process which would block magnetic domain movement and reduce the magnetic properties of the product. MnS is precipitated impurities and the coarsening of MnS phase can reduce the domain block by improving the continuous annealing temperature and the magnetic field would be optimization.

scholarly journals Effect of Heat Treatment on the Microstructure and Corrosion Resistance of Stainless/Carbon Steel Bimetal Plate

2020 ◽  
Vol 2020 ◽  
pp. 1-12 ◽  
Author(s):  
Hao Li ◽  
Liyuan Zhang ◽  
Boyang Zhang ◽  
Qingdong Zhang
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Carbon Steel ◽  
Carbon Content ◽  
Carbon Diffusion ◽  
Annealing Process ◽  
Stainless Steel Surface ◽  
Surface Corrosion ◽  
Annealing Conditions

In order to research the effect of heat treatment on the microstructure and corrosion resistance of stainless/carbon steel bimetal plate, the annealing process at 700°C with different times was carried out for stainless/carbon steel bimetal plate. Because the carbon content of carbon steel was higher than that of stainless steel, the carbon would diffuse from carbon steel to stainless steel in the bimetal plate during the annealing process. The carbon diffusion would cause the thickness of the decarburized layer in carbon steel and the carbon content of stainless steel to increase. The carbon diffusion would be ongoing with the annealing process until the carbon content of stainless steel reached 0.08%. The higher carbon content could help in the formation of more chromium-depleted regions in the stainless steel surface, causing the stainless steel in the bimetal plate to have a poorer surface corrosion resistance than that of stainless steel under the same annealing conditions.

Effect of Atmosphere and Holding Time on the Quality of Surface and Mechanical Properties of the Cold-Rolling Plate of Fe-42% Ni (4J42)

2012 ◽  
Vol 560-561 ◽  
pp. 655-660
Author(s):  
Li Juan Li ◽  
Li Hua Liu ◽  
Jing Wang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Yield Strength ◽  
Cold Rolling ◽  
Surface Quality ◽  
Annealing Process ◽  
Holding Time ◽  
Annealing Condition ◽  
Nitrogen Ratio

In order to guide atmosphere annealing process in industry, the effect of atmosphere and holding times on the surface quality and mechanical properties of the cold-rolling plate of Fe-42% Ni (4J42) was studied. It is found that in the laboratory, surface qualities of all the samples annealed at different annealing condition are all good enough. When the ratio of hydrogen and nitrogen is below 70%:30%, at different holding time, with increasing of H2 proportion, 4J42’s tensile strength and yield strength all increases, and the hardness declines. And except H2:N2=70%:30, when holding time is less than or equal to 1.2min, at different ratio of hydrogen and nitrogen, holding time will influence 4J42’s mechanical properties little. So combine requires in industry with the experiment results, it can be concluded that for 4J42 alloy, annealing at atmosphere of hydrogen nitrogen ratio is less than 70%:30% for about 1.2min is appropriate to atmosphere annealing process in industry.

Effect of Hot-Rolled Microstructure on the Recrystallization Texture of Cold-Rolled Non-Oriented Electrical Steel

2011 ◽  
Vol 298 ◽  
pp. 203-208 ◽  
Author(s):  
Zi Li Jin ◽  
Wei Li ◽  
Yi Ming Li
Keyword(s):  
Cold Rolling ◽  
Electrical Steel ◽  
Texture Evolution ◽  
Steel Strip ◽  
Silicon Steel ◽  
Grain Structure ◽  
Recrystallization Annealing ◽  
Rolled Sheet ◽  
Cold Rolled ◽  
Hot Rolled

With the help of orientation distribution function (ODF) analysis, experiments of different hot band grain microstructure 0.33% silicon steel were cold-rolled and annealed in the laboratory，to study the effect of the microstructure hot-rolled steel strip for cold rolled non-oriented silicon steel microstructure and texture of recrystallization annealing. The results show that hot rolled microstructure on cold rolled Non-Oriented Electrical Steel cold-rolled sheet evolution of texture and recrystallization have important influence, the quiaxed grain structure of steel by cold rolling and recrystallization annealing, the recrystallization speed than the fiber grain-based mixed crystals recrystallization fast , With the equiaxed grains made of cold rolled silicon steel after annealing the {110}<UVW> texture components was enhanced and {100}<uwv> texture components weakened. Different microstructure condition prior to cold rolling in the recrystallization annealing process the texture evolution has the obvious difference, the equiaxial grain steel belt cold rolling and annealing, has the strong crystal orientation. This shows that the equiaxed grain when hot microstructure is detrimental to the magnetic properties of cold-rolled non-oriented silicon steel to improve and increase.

Texture and Microstructure Evolution during Box Annealing of a Non-Oriented-Grain Electrical Steel

2011 ◽  
Vol 702-703 ◽  
pp. 595-598
Author(s):  
Francisco N.C. Freitas ◽  
Manoel Ribeiro da Silva ◽  
Sergio S.M. Tavares ◽  
Hamilton F.G. Abreu
Keyword(s):  
Grain Size ◽  
Magnetic Properties ◽  
Cold Rolling ◽  
Crystallographic Texture ◽  
Electrical Steel ◽  
Electron Backscatter Diffraction ◽  
Magnetization Direction ◽  
Electrical Steels ◽  
Cold Rolling And Annealing ◽  
Work Samples

Non-oriented grain type electrical steels are used mainly in electrical rotating machines such as motors and compressors, in which the magnetization direction rotates 360 ° every cycle while remaining in the plane of the plate. The performance of these devices is affected by crystallographic texture of electrical steels due to strong anisotropy of magnetic properties. The electrical steel is supplied in the form of plates which are processed by cold rolling and subsequent annealing. Both, cold rolling and annealing directly influence the formation of crystallographic texture components. During annealing, recrystallization occurs, and this phenomenon gives rise to changes in texture that influences the quality of the final product and its application. Several works have been published in the study of the evolution of crystallographic texture and grain size in this type of electrical steel. In this work, samples have been taken in industrial conditions at various temperatures during the annealing in a coil box. Electrical steel samples cold rolled with reductions of 50% and 70% in thickness were removed during the process of annealing, and the evolution of texture with increasing temperature was studied. Aspects related to recrystallization, grain size and the evolution of texture and magnetic properties were discussed. Texture and recrystallization were studied by X-ray diffraction and electron backscatter diffraction (EBSD). The magnetic properties were measured in a vibrating sample magnetometer.

Corrosion resistance of electrical steel after calorizing

1991 ◽  
Vol 33 (10) ◽  
pp. 790-791 ◽  
Author(s):  
S. T. Babich ◽  
A. A. Zyabrev ◽  
G. V. Skibina ◽  
V. D. Kiselev
Keyword(s):  
Corrosion Resistance ◽  
Electrical Steel

Magnetic Annealing on GNO Electrical Steel Fe-3.25% Si

2013 ◽  
Vol 758 ◽  
pp. 113-117 ◽  
Author(s):  
Gilberto Alexandre Castello-Branco ◽  
Jennifer Nadine Muller ◽  
Cristiane Maria Basto Bacaltchuk
Keyword(s):  
Magnetic Field ◽  
Grain Size ◽  
Electrical Steel ◽  
Annealing Process ◽  
Magnetic Annealing ◽  
Average Grain Size ◽  
Orientation Density ◽  
Cold Rolled ◽  
Small Grains ◽  
Electrical Motors

Grain non-oriented electrical steel has its main application in electrical motors and its microstructure significantly influences their efficiency. The objective of this work was to investigate whether or not magnetic field applied during annealing process affects grain growth and the development of important texture components leading to an improvement of the magnetic properties. GNO Fe-3.25%Si 75% cold rolled specimens were annealed inside magnetic field with strength of 17 T at the temperature of 800°C for 3, 10 and 30 minutes. Results of average grain size after magnetic annealing showed a microstructure formed by small grains and a few very large grains. Magnetic field did not increase orientation density of {100} oriented grains and Goss grains but was able to increase density of θ fiber and decrease the density of γ fiber.

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