Precipitation Behavior of FeTiP in Ti-added Interstitial Free High Strength Steels

Jia, Junbo; Zhu, Weiwei; Song, Xinli; Zhou, Yuan

doi:10.1016/s1006-706x(16)30107-8

Cited by 6 publications

(3 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In addition, the precipitation of Fe(Nb+Ti)P will also consume solid solution P element, reduce the strength of the strip steel, consume Ti element, increase the interstitial atom C, N, and damage the formability of the material [33,34]. The results show that [35,36], because the formation process of Fe(Nb+Ti)P phase was that the mixed rich group of FeTi and FeNb phase formed first in steel, the Fe(Nb+Ti)P phase formed as P element diffused into the rich group of FeTi and FeNb. With the addition of rare earth, the diffusion ability of Nb and Ti elements dissolved in the steel was weakened, which led to a small number of FeTi and FeNb phases in the steel containing rare earth, and the precondition for the formation of Fe(Nb+Ti)P phase was restrained to some extent.…”

Section: Effect Of Rare Earth Ce On Texture Of Stripmentioning

confidence: 99%

Effect of Rare Earth Ce on Deep Stamping Properties of High-Strength Interstitial-Free Steel Containing Phosphorus

et al. 2020

View full text Add to dashboard Cite

The influence of rare earth Ce on the deep stamping property of high-strength interstitial-free (IF) steel containing phosphorus was analyzed. After adding 120 kg ferrocerium alloy (Ce content is 10%) in the steel, the inclusion statistics and the two-dimensional morphology of the samples in the direction of 1/4 thickness of slab and each rolling process were observed and compared by scanning electron microscope (SEM). After the samples in each rolling process were treated by acid leaching, the three-dimensional morphology and components of the second phase precipitates were observed by SEM and energy dispersive spectrometer (EDS). The microstructure of the sample was observed by optical microscope, and the grain size was compared. Meanwhile, the content and strength of the favorable texture were analyzed by X-ray diffraction (XRD). Finally, the mechanical properties of the product were analyzed. The results showed that: (1) The combination of rare earth Ce with activity O and S in steel had lower Gibbs free energy, and it was easy to generate CeAlO3, Ce2O2S, and Ce2O3. The inclusions size was obviously reduced, but the number of inclusions was increased after adding rare earth. The morphology of inclusions changed from chain and strip to spherical. The size of rare earth inclusions was mostly about 2–5 μm, distributed and dispersed, and their elastic modulus was close to that of steel matrix, which was conducive to improving the structure continuity of steel. (2) The rare earth compound had a high melting point. As a heterogeneous nucleation point, the nucleation rate was increased and the solidification structure was refined. The grade of grain size of products was increased by 1.5 grades, which is helpful to improve the strength and plasticity of metal. (3) Rare earth Ce can inhibit the segregation of P element at the grain boundary and the precipitation of Fe(Nb+Ti)P phase. It can effectively increase the solid solution amount of P element in steel, improve the solid solution strengthening effect of P element in high-strength IF steel, and obtain a large proportion of {111} favorable texture, which is conducive to improving the stamping formability index r90 value.

show abstract

Section: Effect Of Rare Earth Ce On Texture Of Stripmentioning

confidence: 99%

Effect of Rare Earth Ce on Deep Stamping Properties of High-Strength Interstitial-Free Steel Containing Phosphorus

et al. 2020

View full text Add to dashboard Cite

show abstract

“…A adição de fósforo também promove a formação de precipitados do tipo FeTiP. Estes precipitados, no entanto, consomem o excesso de titânioque formaria carbetosno aço IF, deixando solutos de carbono presentes na matriz [19]. Com efeito, o trabalho de SEGUNDO [7], neste mesmo material, evidenciou a presença de precipitados de FeTiP.…”

Section: Aços If-tinbpunclassified

Análise De Textura Cristalográfica Por Difração De Raios X Em Aços if Com Diferentes Adições De Titânio, Nióbio E Fósforo

Santos¹

2017

Anais Do Congresso Anual Da ABM

View full text Add to dashboard Cite

Resumo Os aços IF (do inglês "interstitial free") encontram ampla aplicação na indústria automobilística devido à sua superior estampabilidade. A textura cristalográfica desenvolvida durante a laminação de aços IF tem um papel fundamental na conformabilidade das chapas laminadas, sendo desejável o desenvolvimento de uma forte fibra gama e fraca fibra alfa. Neste trabalho, três tipos de aços IF, com diferentes adições de titânio, nióbio e fósforo, foram submetidos a análise de textura cristalográfica por difração de raios X, de modo a avaliar o impacto dos tratamentos termomecânicos realizados e da variação de composição química nas orientações cristalográficas formadas. As texturas foram analisadas utilizando-se funções de distribuição de orientação (ODF). Os resultados das seções de ODF foram comparados a valores anteriormente obtidos para os coeficientes de anisotropia normal e planar destes mesmos aços. A textura nas amostras laminadas de fato apresentou fibra gama intensificada e fibra alfa parcial. O aço IF-TiNbP foi o que apresentou melhor textura para estampagem profunda. No entanto, foi observada componente Goss na superfície do mesmo. Palavras-chave: Textura Cristalográfica; Aços IF; Difração de raios X.

show abstract

“…However, Ghosh [4] and others have shown that the stable formation temperature of FeTi(Nb)P is close to that of TiC (690-720°C), and the precipitation order of the two is closely related to the steel composition. In IF steels with high P and Ti contents, FeTi (Nb)P is formed shorter than TiC, while low P and Ti contents will first lead to precipitation of TiC [9]. Therefore, the precipitation mechanism of FeTi(Nb)P precipitates remains to be further studied.…”

Section: Introductionmentioning

confidence: 99%

Precipitation behaviour of phosphorus in high strength IF steel during laminar cooling

Wang

Cui

2020

Ironmaking & Steelmaking

View full text Add to dashboard Cite

In order to study the precipitation behaviour of phosphorus-containing precipitates in the rolling and cooling process of phosphorus-containing high-strength interstitial free steels, and to solve the problem of the tensile-straightening broken belt in the actual production process, the GLEEBLE-3500 thermal simulator was used to simulate the rough rolling, finishing and laminar cooling processes, in which different cooling speeds were used to simulate the laminar cooling process, and the transmission electron microscope was used to study the microstructure of steel and the precipitation behaviour of phosphorus. Studies have shown that as the cooling rate increases, the size and quantity of phosphorus-containing precipitates at the grain boundaries gradually decrease, and the content of phosphorus in the precipitates decreases significantly.

show abstract

Precipitation Behavior of FeTiP in Ti-added Interstitial Free High Strength Steels

Cited by 6 publications

References 24 publications

Effect of Rare Earth Ce on Deep Stamping Properties of High-Strength Interstitial-Free Steel Containing Phosphorus

Effect of Rare Earth Ce on Deep Stamping Properties of High-Strength Interstitial-Free Steel Containing Phosphorus

Análise De Textura Cristalográfica Por Difração De Raios X Em Aços if Com Diferentes Adições De Titânio, Nióbio E Fósforo

Precipitation behaviour of phosphorus in high strength IF steel during laminar cooling

Contact Info

Product

Resources

About