Mn/S 20, there is a high probability of embrittlement in the stable austenite region. However, the higher ratio of Mn/S and low sulphur content, as it was in the tested steel, cannot warrant sufficient hot ductility in the stabile austenite region, and this way it excludes cracking during continuous casting. Effect of Carbon on Hot Ductility of As-cast Low Alloy 3. Effect of C on Hot Ductility during Cooling after Remelting Steels B 1 to B5 specimens with low Mn and rela-tively high S contents were deformed at 1 050 °C at a strain rate of 1.0 s-1 after remelting. The fracture surfaces are shown in Photo. 5. Typical intergranu-
Dec 01, 2014 · Abstract The hot ductility of eco-friendly Bi-S based free cutting steels with different Mn/S ratios was studied using a Gleeble-1500 thermalmechanical simulator. The hot ductility of the steel was found to depend on the Mn/S ratio, and the Mn/S ratio of the steel should be greater than 3.5 for hot rolling of billets without crack development. The low Mn/S ratio would inhibit the occurrence Effect of Thermal Cycle and Nitrogen Content on the Hot The hot ductility of a low and high Al containing steel having 0.1%C and 0.4%Mn is examined. The steels are heated to 1350°C at 60 K min-1 and strained to failure at a strain rate of 10-3 s-1. Effect of Ti and B microadditions on the hot ductility Nov 11, 2015 · Generally, the results of these research works have shown a decrease of the hot ductility in the temperature range of 7001000 °C due to the AlN precipitation and the high Mn content (i.e. the associated segregation) and the precipitation of microalloying elements such as Nb and V at grain boundaries. Likewise, a hot ductility improvement at
A sharp decrease of the hot ductility is recognizable at 1398 K (1125 °C), at only 0.7 wt pct manganese because of the low manganese to sulfur ratio. The grades with a Mn content up to 1.9 wt pct show a good ductility with minimal ductility loss. In comparison, the steel grade with 18.2 wt pct has a poor hot ductility. Hot Ductility Of Directly Cast Steels With Different Recently, Mintz and Mohamed (6) examined the hot ductility ofC-Mn-Al and C-Mn-Al-Nb steels with carbon content in the range 0.05-0.15% and 0.014-0.16% respectively. They found that hot ductility of the AI containing steels is insensitive to the carbon level, but there was little influence of carbon on hot ductility ofNb containing steels. Hot-ductility Recovery by ManganeseSulphide Thehot-ductility the embrittled steel improved by annealing at a test temperature. This wasaccompaniedby MnSprecipitation. Apre-deformation and a reduced Scontent accelerated the hot-ductility re-covery. Theapparent activation energy for the hot-ductility recovery has beendetermined to be 461.2-491.3 kJ/mol.
Effect of Mn (14.94,18.21, and 23.6 wt%) and Al (0.002,0.75, and 1.47 wt%) contents on hot ductility of five high alloy Fe-xMn-C-yAl austenitic Twinning induced plasticity (TWIP) steels were Influence of Composition on the Hot DuctilitY of Steels Cu, Sn, Sand P, on the hot ductility of steels. Nitrogen is generally detrimental to ductility in Al containing and microal[oyed steels; to avoid transverse cracking the NIevels should be kept as low as possible. WhenTi additions are madeto low N, C-Mn-Al steels, (0.005/o N) the best ductility is likely to be given by a high Ti:Nratio of 4-5 Influence of Cu alloying on hot ductility of C-Mn-Al and A beneficial effect of the copper on the hot ductility was observed in Ti-Nb microalloyed steels over the temperature range 800-1,000 °C at the cooling rate of 0.4 °C/s, but no influence at the cooling rate of 4 °C/s. Precipitates containing Nb and Ti were present whose size was coarser in the Cu-bearing grade as cooled at 0.4 °C/s.
The influence of S and (Mn/S) on the crack susceptibility of continuous casting steels was studied. It is theoretically demonstrated that there is a critical value of the (Mn/S) ratio, (Mn/S) c, under which a high susceptibility to cracking, during casting or deformation of ascast material, is expected.The value of (Mn/S) c increases as the S content of the steel decreases. Roles of (Fe, Mn) 3 Al Precipitates and MBIP on the Hot In the automotive industry, lightweight steel has received much attention because steel comprises a significant portion of a vehicles total weight. FeMnAlC steel is a representative lightweight steel due to its high performance and low density. However, there is insufficient research into the welding characteristics of FeMnAlC lightweight steels. In this study, hot Roles of (Fe, Mn) 3 Al Precipitates and MBIP on the Hot In the automotive industry, lightweight steel has received much attention because steel comprises a significant portion of a vehicles total weight. FeMnAlC steel is a representative lightweight steel due to its high performance and low density. However, there is insufficient research into the welding characteristics of FeMnAlC lightweight steels. In this study, hot
For instance, manganese (Mn) 3xxx is a moderate strength, non-heat-treatable material that retains strength at increased temperatures. A large part of manganese is used as high-carbon ferromanganese and added to carbon steels. The low- and medium- carbon ferroalloy and electrolytic manganese are used in lower carbon content steels. The Properties and Effects of Manganese as an Alloying For instance, manganese (Mn) 3xxx is a moderate strength, non-heat-treatable material that retains strength at increased temperatures. A large part of manganese is used as high-carbon ferromanganese and added to carbon steels. The low- and medium- carbon ferroalloy and electrolytic manganese are used in lower carbon content steels. The influence of microalloying elements on the hot 2.6 Effect of Composition on Hot Ductility 42 2.6.1 Influence of Carbon on Hot Ductility 42 2.6.2 Effects of Sulphur on Hot Ductility 43 2.6.3 C-Mn-Al Influence of AlN on Hot Ductility 46 2.6.4 C-Mn-Al-Nb - Influence of Nb on Hot Ductility 48 2.6.5 C-Mn-Al-Ti- Influence of Ti on Hot Ductility 50
Apr 11, 2001 · In most hot-ductility studies, different aspects have been reported, such as the effects of carbon content, the size distribution of NbCN particles, the interparticle distances of those precipitates, the effects of strain rate, the precipitation effects of (Fe, Mn)S-O particles at high temperatures, and comparisons between the conventional hot