Mao, Wenwen Li, Jie Liu, Yong Yang, Chengyu Gao, Yu Xing, Liyong Liu, Xianmin Li, Jie Zhao, Haitao
Published in
High Temperature Materials and Processes
In this work, normal manufacture of a B-bearing steel was hampered by cracks in steel. In order to control these cracks, the formation mechanism has been examined through a comprehensive analysis of crack morphology, element segregation, high temperature mechanical properties, and precipitates. The high-temperature thermoplastic capabilities of the...
Sadeghi, Fazlollah Zargar, Tahereh Lahino, Muhamad Rasyad Arkan Kim, Hyeju Kwon, Sang-Hum Heo, Yoon-Uk Lee, Jae Sang Yim, Chang Hee
The influence of reheating temperatures on hot ductility is investigated in two Ni-, Mo-, and Cu-containing low-carbon steels. The effects of solution treatment conditions at 1623, 1673 K, and remelting at 1803 K on the reduction in area (RA) are analyzed. The results show an RA trough in the range of 973–1173 K in all experimental conditions. At 9...
fojt-dymara;, gabriela
Tests were carried out on two high-Mn steels: 27Mn-4Si-2Al-Nb with Nb microaddition and 24Mn-3Si-1.5Al-Nb-Ti with Nb and Ti microadditions. High-manganese austenitic steels, due to their good strength and plastic properties belong to the AHSS (Advanced High-Strength Steel) group and are used in the automotive industry. The main difficulties faced d...
Liang, Yuyu Xin, Wenbin Zhang, Jing Meng, Qingyang Jiang, Yinju Deng, Yongchun
Published in
Metallurgical Research & Technology
The effect of Ce on hot ductility of Cu-As bearing steel in the temperature ranging from 700 to 1100 °C was investigated using Gleeble-3800 thermal-mechanical simulator. The hot ductility evaluation and fracture morphology observation showed that the hot ductility was obviously improved as Ce content increased from 0 to 0.0290 wt%. Detailed, the up...
Zheng, Yaxu Shen, Wei Zhu, Liguang Guo, Zhihong Wang, Qi Feng, Jie Li, Yongliang Cao, Ruifang Wu, Jiayi
Published in
High Temperature Materials and Processes
The hot tensile tests were conducted in this study to investigate the effects of Nb, B, Mo, and V on hot ductility of 25CrMo alloy steel in a temperature range of 650–850°C with strain rates of 0.005 and 0.5 s−1. Besides, the influences of ferrite transformation and precipitates on hot ductility were also investigated by the use of SEM and TEM. The...
Liu, Yang Sun, Yan-hui Wu, Hao-tian
Published in
International Journal of Minerals, Metallurgy and Materials
It is well-known that the surface quality of the niobium microalloy profiled billet directly affects the comprehensive mechanical properties of the H-beam. The effects of chromium on the γ/α phase transformation and high-temperature mechanical properties of Nb-microalloyed steel were studied by Gleeble tensile and high-temperature in-situ observati...
Saleil, Jean Mantel, Marc Le Coze, Jean
Published in
Matériaux & Techniques
La coulée des aciers inoxydables, autrefois en lingots, s’effectue aujourd’hui par coulée continue. Ce mode de coulée a permis une considérable simplification de la gamme de fabrication (suppression du dégrossissage au blooming). La généralisation de la coulée continue aux aciers inoxydables fut assez tardive car il fallait satisfaire à deux impéra...
Li, Qi Liu, Weijie
Published in
Materials
Effect of boron on the hot ductility and room-temperature tensile properties of Ti-Nb-microalloyed steels containing 0.071 wt.% carbon was studied. The thermal stress and thermal strain of continuous casting billets during cooling were simulated via hot tensile tests at the deformation rate of (6 mm/11,000)/s, and the hot ductility of different mic...
Schindler, Ivo Sauer, Michal Kawulok, Petr Rodak, Kinga Hadasik, Eugeniusz Jabłońska, Magdalena Barbara Rusz, Stanislav Ševčák, Vojtěch
Nil strength temperature of 1062 degrees C and nil ductility temperature of 1040 degrees C were experimentally set for CuFe2 alloy. The highest formability at approx. 1020 degrees C is unusable due to massive grain coarsening. The local minimum of ductility around the temperature 910 degrees C is probably due to minor formation of gamma-iron. In th...
Kajzar, Petr
S využitím simulátoru HDS-20 byly zkoumány plastické vlastnosti za vysokých teplot dvou nízkolegovaných Cr-Mo ocelí, které se lišily obsahem uhlíku a manganu. Speciálním testem byla stanovena teplota nulové pevnosti obou ocelí. V případě oceli 4130 byla teplota nulové pevnosti rovna 1444 °C, v případě oceli 4140 (s vyšším obsahem uhlíku) byla teplo...
