Influence of Alloying Elements in Hot Dip Galvanized High Tensile Strength Sheet Steels on the Adhesion and Iron-zinc Alloying Rate

Nishimoto, Akihiko; Inagaki, Jun-ichi; Nakaoka, Kazuhide

doi:10.2355/tetsutohagane1955.68.9_1404

Cited by 36 publications

(25 citation statements)

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“…The concentration of sodium citrate in the bath was changed in the range of 0 to 40 g/dm 3 . Furthermore, iron sulfate (III) of 0 g/dm 3 to 35.8 g/dm 3 was put into the bath with sodium citrate of 10 g/dm 3 in order to add Fe 3+ to the bath in the concentration of 0 to 10 g/dm 3 . Electroplating of iron was performed to prepare a coating of which weight is ranged from 3 to 10 g/m 2 .…”

Section: Methodsmentioning

confidence: 99%

“…Electroplating of iron was performed to prepare a coating of which weight is ranged from 3 to 10 g/m 2 . For comparison of the galvanizability, two types of steel were prepared by electroplating in baths with 10 g/dm 3 of sodium citrate and without sodium citrate under the bath condition of no additional iron sulfate (III).…”

Section: Methodsmentioning

confidence: 99%

“…The oxygen content in the coating increased rapidly as the concentration of sodium citrate increases in the bath. The bath with sodium citrate of 10 g/dm 3 gave about 4 mass% oxygen in the coating. The oxygen content gradually increased when the sodium citrate content exceeded 10 g/dm 3 .…”

Section: Characterization Of Annealed Steelsmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10][11][12] It was also reported that alloying elements such as silicon and phosphorus retard the alloying reaction between Zn and Fe during galvannealing on the CGL. 3,4,[13][14][15][16] The electroplating technique to form an iron coating on steels may give a solution to these problems. [17][18][19][20][21] However, the mechanism responsible for improving the galvanizability of silicon bearing-steel with an electrodeposited iron coating has not been systematically clarified.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of Galvanizability of Silicon-bearing Steel by Electrodeposited Iron Coating Containing Oxygen

Tobiyama¹,

Fujita²,

Maruyama

2012

ISIJ Int.

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Iron coatings were prepared by electrodeposition in a bath containing citrate to improve the galvanizability of silicon-bearing steel.The iron coating electrodeposited from the bath containing citrate contains more than 4 mass% oxygen. This oxygen originates from the incorporation of the hydroxide of Fe 3+ during electroplating. The oxygen-containing coating improves the galvanizability of the silicon-bearing steel by suppressing the surface segregation of silicon during annealing. This is because silicon in the steel reacts with oxygen in the oxygen-containing coating to form internal oxides during annealing.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Characterization Of Annealed Steelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Improvement of Galvanizability of Silicon-bearing Steel by Electrodeposited Iron Coating Containing Oxygen

Tobiyama¹,

Fujita²,

Maruyama

2012

ISIJ Int.

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“…7,8) It is believed that higher Mn levels significantly deteriorate the R values and total elongation [7][8][9] whereas, higher Si levels deteriorate coating adhesion. 10,11) Hence, P is the preferred addition to increase the strength of the ULC steels.…”

Section: Introductionmentioning

confidence: 99%

The Segregation Behavior of Phosphorus in Ti and Ti+Nb Stabilized Interstitial-Free Steels.

et al. 2000

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The phenomenon of cold work embrittlement (CWE) in the P-added high strength interstitial-free steels has been associated with the segregation of P to the ferrite grain boundaries. This segregation by P is believed to decrease the cohesive strength of the grain boundaries by weakening their bonding. Hence, the resistance of the steel to brittle fracture, i.e., intergranular fracture, is greatly decreased. The goal of the present study was to investigate the segregation behavior of P during the different stages of processing (prior to and after coiling, and after cold rolling and annealing) in Ti and Ti+Nb stabilized interstitial-free steels. It was found that a considerable amount of segregation of P to the ferrite grain boundaries occurred during the coiling process in Ti-stabilized interstitial-free steels. However, with the addition of Nb in the Ti+Nb-stabilized interstitial-free steels, the segregation of P was decreased in the as-coiled condition. The P content on the ferrite grain boundaries in the final cold rolled and annealed condition was found to depend on two factors; (1) the segregation of P in the as-coiled condition, and (2) availability of Ti to form phosphides during the annealing process. It was confirmed in this study that the addition of P decreases the CWE resistance of the steel. Furthermore, it appears that the CWE resistance of the TiϩNb-stabilized interstitial-free steels is improved by the presence of solute Nb on the ferrite grain boundaries.KEY WORDS: segregation; ULC Steels; cold work embrittlement; thermomechanical processing.is essential to cause TE, the exact mechanism of TE is still not clearly understood.The phenomenon of temper embrittlement in ULC steels has been also documented and is called secondary work (SWE) or cold work (CWE) embrittlement. [23][24][25][26][27][28][29][30] The CWE phenomenon is defined as the susceptibility of the sheet material to intergranular fracture during the secondary working of a deeply drawn part or while in service. The CWE phenomenon is attributed to the segregation of P to the ferrite grain boundaries which is believed to reduce their cohesive strength and, hence, cause intergranular fracture along the ferrite grain boundaries. 23,29,30) It has been shown that the Nb-containing steels have a better CWE resistance than the Ti-containing steels. 24,31) This has been attributed to the partial stabilization of C in the Nb-containing steels. It is believed that carbon increases the grain boundary cohesion and increases the CWE resistance. [32][33][34] Furthermore, Erhart and Grabke have shown that as the C concentration on the grain boundaries is increased, the concentration of P on the grain boundaries is decreased which would also improve the CWE resistance. 35) Although it is known that the segregation of P to the ferrite grain boundaries causes CWE, its segregation behavior during the different stages of thermomechanical processing of interstitial-free steels is not known. In this study, the segregation behavior of P during the different stage...

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Formation sequence of Fe–Al intermetallic phases at interface between solid Fe and liquid Zn–6Al–3Mg alloy

et al. 2019

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Influence of Alloying Elements in Hot Dip Galvanized High Tensile Strength Sheet Steels on the Adhesion and Iron-zinc Alloying Rate

Cited by 36 publications

References 1 publication

Improvement of Galvanizability of Silicon-bearing Steel by Electrodeposited Iron Coating Containing Oxygen

Improvement of Galvanizability of Silicon-bearing Steel by Electrodeposited Iron Coating Containing Oxygen

The Segregation Behavior of Phosphorus in Ti and Ti+Nb Stabilized Interstitial-Free Steels.

Formation sequence of Fe–Al intermetallic phases at interface between solid Fe and liquid Zn–6Al–3Mg alloy

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