Forming characteristics and mechanical parameter sensitivity study on pre-phosphated electro-galvanized sheet steel

Jiang, Hao-min; Chen, X.P.; Wu, Hao; Li, C.H.

doi:10.1016/j.jmatprotec.2004.04.069

Cited by 15 publications

(4 citation statements)

References 3 publications

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“…and their forming characteristics and friction properties are important (Jiang et al, 2004). Early research of Hauw ever studied the stamping process of galvanized sheets, but he used the average mechanical data of the coating and substrate to calculate, his results are coarse (Hauw et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Predicting forming limit of electrodeposited nickel coating based on practical stress–strain relationship

Zhou

Tang

et al. 2008

Journal of Materials Processing Technology

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Section: Introductionmentioning

confidence: 99%

Predicting forming limit of electrodeposited nickel coating based on practical stress–strain relationship

Zhou

Tang

et al. 2008

Journal of Materials Processing Technology

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“…It is well-known that coated steel sheet has better mechanical properties such as elongation, strain hardening coefficient and anisotropy exponent than uncoated steel sheet [1,2]. Frictional behavior of coated steel sheet is different from that of uncoated steel sheet due to the existence of coated layer.…”

Section: Introductionmentioning

confidence: 99%

Formability Evaluation of Coated and Uncoated Steel Sheets with Consideration of Frictional Characteristics

Lee

et al. 2007

KEM

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Galvannealed steel sheets are being widely used in automotive application for better corrosion resistance. It is generally known that uncoated steel sheets have better mechanical properties than coated steel sheets due to presence of zinc coating. But frictional characteristics of coated steel sheets are very different from those of uncoated steel sheets. Therefore the study on mechanical and frictional characteristics of these steel sheets is needed. In this study, tensile test was performed to evaluate mechanical properties of coated and uncoated steel sheets. Cup drawing test was performed to measure friction-coefficient. And frictional characteristics were analyzed by using FE-analysis. The effect of mechanical and frictional properties on cup drawing was investigated. It was shown that the frictional properties more affected cup drawing.

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“…Due to excellent corrosion resistance, galvanized sheets have been widely used in automotive components [2] . With development of the automobile industry, improvement of the production capacity of the galvanized sheet has been the trend in order to meet the increasing market demand for galvanizing product.…”

mentioning

confidence: 99%

Computer simulation of the continuous annealing recrystallization for cold-rolled strip in galvanizing line

Wen

Xudong

et al. 2011

J. Shanghai Jiaotong Univ. (Sci.)

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The continuous heating transformation program is developed to investigate the influence of continuous annealing technological parameters on recrystalization for cold-rolled strip in galvanizing line. This program can be used for the calculation of the continuous annealing temperature field of strip steel, determination of the start and end time of recrystallization in continuous heating process, and procurement of the continuous heating transformation diagram. The temperature field for continuous annealing is simulated by means of finite difference method. Based on the Scheil superposition principle, the continuous heating transformation curve is obtained by using time temperature transformation (TTT) curve which is measured experimentally. The developed program has been used in practice, and the strip speed on production line increases by more than 10%.Hot-dip galvanizing process is one of the most common methods for protecting the cold-rolled steel sheets against corrosion [1] . Due to excellent corrosion resistance, galvanized sheets have been widely used in automotive components [2] . With development of the automobile industry, improvement of the production capacity of the galvanized sheet has been the trend in order to meet the increasing market demand for galvanizing product. High-speed galvanized method was used by many companies in developed countries, for example, the fastest speed of galvanizing line for Spanish companies reached 258 m/min, whereas, maximum speed of 1550 galvanizing line was 180 m/min for Baosteel. It means that the speed-increasing can significantly improve the production capacity through optimizing processing parameters on the basis of studying continuous annealing and recrystalization occurred in the continuous annealing [3][4][5][6] .In this paper, the influence of continuous annealing technological parameters on recrystalization of coldrolled strip in galvanizing line, such as the strip thickness and the speed of production line, is investigated.For this purpose, time temperature transformation (TTT) curve of cold-rolled strip is measured experimentally. The continuous annealing temperature field of strip steel is simulated by the finite difference method. Based on Scheil superposition principle, according to TTT diagram, the continuous heating transformation curve is obtained.

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Forming characteristics and mechanical parameter sensitivity study on pre-phosphated electro-galvanized sheet steel

Cited by 15 publications

References 3 publications

Predicting forming limit of electrodeposited nickel coating based on practical stress–strain relationship

Predicting forming limit of electrodeposited nickel coating based on practical stress–strain relationship

Formability Evaluation of Coated and Uncoated Steel Sheets with Consideration of Frictional Characteristics

Computer simulation of the continuous annealing recrystallization for cold-rolled strip in galvanizing line

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