Effect of austenitizing temperature on the mechanical properties of high-strength maraging steel

Hou, Hua; Qi, L.; Zhao, Yuhong

doi:10.1016/j.msea.2013.08.070

Cited by 43 publications

(34 citation statements)

References 10 publications

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“…Table 2 showed that the tensile strength presents a downward trend with the increase of austenite grain size. Similar experimental results have been reported in other high-strength steels [23][24][25]. It suggested that the tensile strength gradually decreases due to a coarser austenite grain with the austenitising temperature increasing.…”

Section: Discussionsupporting

confidence: 88%

The Role of Retained Austenite and Its Carbon Concentration on Elongation of Low Temperature Bainitic Steels at Different Austenitising Temperature

Dong

Hou

Zhou

et al. 2018

Metals

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The influence of austenitising temperature on the tensile properties of low temperature bainitic steel was investigated. With the increasing austenitising temperature, a significant change of elongation was found between 850 and 950 • C, which was changed from 1.0 ± 0.5 to 10.7 ± 2.0%; while there was a slight increase between 950 to 1050 • C (11.2 ± 1.5%). By characterising the retained austenite at necking and matrix, we found that the elongation is obviously correlated with the retained austenite content, and also determined by the volume change of retained austenite during the tensile test. The transformation induced plasticity (TRIP) effect, which contributes to the improve elongation, almost did not occur at 850 • C due to the relatively low volume percentage of retained austenite and its high carbon concentration, which resulted in a very low martensite transformation temperature. With the austenitising, the temperature was increased up to 950 and 1050 • C, and a large volume percentage of retained austenite was observed in the matrix. Meanwhile, a considerable amount of retained austenite has occurred by the TRIP effect because of a moderate carbon content.

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Section: Discussionsupporting

confidence: 88%

The Role of Retained Austenite and Its Carbon Concentration on Elongation of Low Temperature Bainitic Steels at Different Austenitising Temperature

Dong

Hou

Zhou

et al. 2018

Metals

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“…According to Hou et al 14 , maraging steels forged and solution annealed at temperatures of 750, 800, 850, 900, 950 and 1000 °C for 1 hour and then aged at 500 °C for 2 hours have their mechanical properties reduced with increasing temperature. They also observed that there was a significant reduction in the impact energy of 60 J to 10 J with respect to temperatures of 750 °C and 1000 °C respectively.…”

Section: Discussionmentioning

confidence: 99%

Influence of Solution Annealing on Microstructure and Mechanical Properties of Maraging 300 Steel

2016

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Maraging 300 belongs to a family of metallic materials with extremely high mechanical strength and good toughness. Some works have been published about aging temperatures that improve ultimate strength resistance with acceptable toughness levels in this steel family, where the prior austenite grain size obtained by different solution annealing temperature influence in the final mechanical properties. Solution annealing temperatures ranging from 860 °C to 1150 ºC and were kept constant until the aging temperature. These treatments were used in order to investigate their influence on the microstructure and mechanical properties of maraging steel 300, especially with regard to toughness. The characterization of the microstructure was performed by optical microscopy, scanning electron microscope (SEM) and X-ray diffraction (XRD). Mechanical properties were evaluated by Rockwell C hardness and Charpy impact tests. The results showed that there is a temperature range where one can get some improvement in toughness without a large loss of mechanical strength.

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“…Para isto, utilizou-se a norma ASTM E112 -12. Comparando as FDOC das amostras após a solubilização com a FDOC da amostra após a laminação observa-se que a textura de Cubo Girado (001) [1][2][3][4][5][6][7][8][9][10] continua presente em diferentes intensidades. A textura Cubo Girado é característica do processo de laminação.…”

Section: Methodsunclassified

“…A solubilização em temperaturas acima da convencional foi realizada com o objetivo de melhorar a tenacidade à fratura sem perdas significativas da resistência mecânica. A solubilização em temperaturas acima da recomendada pelos fabricantes (820°C) resultou em um crescimento do grão austenítico, que se tornou muito acentuado acima de 1000°C, pois há um crescimento exponencial dos grãos, pois os precipitados já estão se difundindo no material e não impede o crescimento do grão [10]. Além disso, a temperatura de solubilização acima da convencional tem o propósito de aumentar a tenacidade do material [11].…”

Section: Introductionunclassified

Análise De Textura Em Aços Maraging 300 Solubilizado Em Altas Temperaturas

Vieira¹,

Muniz²,

Abreu³

2019

ABM Proceedings

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Resumo Os aços Maraging são aços de ultra-alta resistência com aplicações, desde vasos de alta pressão de operação em processos críticos até equipamentos esportivos. Atualmente, os aços Maraging com 18% de Ni são os mais utilizados. Eles podem ser fornecidos nas classes 200, 250, 300 e 350. O presente estudo utilizou o aço Maraging 300, que foi tratado termicamente em temperaturas de solubilização acima da convencional, com o objetivo de melhorar a tenacidade à fratura sem perdas significativas da resistência mecânica. A solubilização em temperaturas acima da recomendada pelos fabricantes (820°C) resultou em um crescimento do grão austenítico, que se tornou muito acentuado acima de 1000°C. O aço Maraging é um material anisotrópico, portanto, é importante analisar a orientação cristalográfica do material. Para isso, foi realizado Difração de Raio-X nas amostras. Foi observado que a textura de Cubo Girado persiste, após a solubilização, em diferentes intensidades. Já a fibra gama não continua após os tratamentos térmicos de solubilização.

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Effect of austenitizing temperature on the mechanical properties of high-strength maraging steel

Cited by 43 publications

References 10 publications

The Role of Retained Austenite and Its Carbon Concentration on Elongation of Low Temperature Bainitic Steels at Different Austenitising Temperature

The Role of Retained Austenite and Its Carbon Concentration on Elongation of Low Temperature Bainitic Steels at Different Austenitising Temperature

Influence of Solution Annealing on Microstructure and Mechanical Properties of Maraging 300 Steel

Análise De Textura Em Aços Maraging 300 Solubilizado Em Altas Temperaturas

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