Effect of heat input on microstructure and toughness of rare earth-contained C–Mn steel

2018 ◽  
Vol 25 (10) ◽  
pp. 1033-1042 ◽  
Author(s):  
Ming-ming Song ◽  
Bo Song ◽  
Sheng-hua Zhang ◽  
Zhan-bing Yang ◽  
Zheng-liang Xue ◽  
...  
Keyword(s):  
Rare Earth ◽  
Heat Input ◽  
Mn Steel

scholarly journals The Microstructure and Property of the Heat Affected zone in C-Mn Steel Treated by Rare Earth

2019 ◽  
Vol 38 (2019) ◽  
pp. 362-369 ◽  
Author(s):  
Ming-ming Song ◽  
Yu-min Xie ◽  
Bo Song ◽  
Zheng-liang Xue ◽  
Nan Nie ◽  
...  
Keyword(s):  
Rare Earth ◽  
Impact Toughness ◽  
Heat Affected Zone ◽  
Acicular Ferrite ◽  
Steel Matrix ◽  
Impact Properties ◽  
Treated Steel ◽  
The Impact ◽  
Welding Processes ◽  
Mn Steel

AbstractThe microstructures and impact properties of the heat affected zone (HAZ) in steel treated by rare earth (RE) under different welding processes were discussed. The effect of Al on the impact properties of the HAZ in RE treated steel was analyzed. It finds that when the welding t8/5 is smaller than 111 s, the main microstructure in steels is bainite/widmanstatten. The impact toughness of the HAZ is lower than that of the steel matrix. When t8/5 is more than 250 s, the microstructure is mainly acicular ferrite (AF) in the steel treated by RE, and the impact toughness of HAZ is obviously improved. Even under the welding processing with t8/5 about 600 s in RE treated steel can still obtain a lot of AF. While in the steel killed by Al and treated by RE, the main microstructure is parallel cluster of bainite/widmanstatten, and the impact toughness of HAZ is significantly lower than that of low-Al RE treated steel. Al can deteriorate the optimizing of RE treatment on HAZ.

Improvement of hot ductility of C-Mn Steel containing arsenic by rare earth Ce

2018 ◽  
Vol 115 (4) ◽  
pp. 419 ◽  
Author(s):  
Wenbin Xin ◽  
Jing Zhang ◽  
Guoping Luo ◽  
Ruifen Wang ◽  
Qingyong Meng ◽  
...  
Keyword(s):  
Rare Earth ◽  
Grain Boundary ◽  
Boundary Segregation ◽  
Fracture Morphology ◽  
Grain Boundary Segregation ◽  
Hot Ductility ◽  
Ductility Trough ◽  
Reduction Of Area ◽  
Mn Steel ◽  
Ce Content

The effect of different Ce content on the hot ductility of C-Mn steel containing arsenic was investigated at the temperature ranging from 700 to 1100 °C conducting Gleebel-1500 thermal-mechanical simulator. The reduction of area (RA%) was used to evaluate the hot ductility. The 0.16 mass% As widened the ductility trough range and especially, decreased the RA value at 850–950 °C. Conversely, adding Ce in the steel could remedy the arsenic-induced hot ductility deterioration. Moreover, with the increase of Ce content from 0 to 0.035 mass%, the RA value at 800–950 °C significantly increased, compared to that of the arsenic steel. When the content of Ce reached 0.027–0.035 mass%, the RA value at 800–850 °C was even higher than that of steel without As. Besides, the corresponding fracture morphology was changed from intergranular feature to ductile and/or interdendritic feature. Grain refinement by Ce addition, the formation of arsenious rare earth inclusions and grain boundary segregation of Ce were considered to improve the hot ductility of the steel containing As.

Effects of rare earth addition on microstructure of C–Mn steel

2015 ◽  
Vol 42 (8) ◽  
pp. 594-599 ◽  
Author(s):  
M.-M. Song ◽  
B. Song ◽  
W.-B. Xin ◽  
G.-L. Sun ◽  
G.-Y. Song ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Addition ◽  
Mn Steel

Effects of Mn and Al on the Intragranular Acicular Ferrite Formation in Rare Earth Treated C–Mn Steel

2017 ◽  
Vol 36 (7) ◽  
pp. 683-691 ◽  
Author(s):  
Mingming Song ◽  
Bo Song ◽  
Zhanbing Yang ◽  
Shenghua Zhang ◽  
Chunlin Hu
Keyword(s):  
Rare Earth ◽  
Acicular Ferrite ◽  
Lattice Misfit ◽  
Ferrite Formation ◽  
Al Content ◽  
Bainite Structure ◽  
Mn Content ◽  
Intragranular Acicular Ferrite ◽  
Upper Bainite ◽  
Mn Steel

AbstractThe influence of Al, Mn and rare earth (RE) on microstructure of C–Mn steel was investigated. The capacities of different RE inclusions to induce intragranular acicular ferrite (AF) formation were compared. Result shows that RE treatment could make C–Mn steel from large amounts of intragranular AF. Al killed is detrimental to the formation of intragranular AF in RE-treated C–Mn steel. An upper bainite structure would replace the AF when Al content increased to 0.027 mass %. The optimal Mn content to form AF is about 0.75–1.31 mass %. The effective RE inclusion which could induce AF nucleation is La2O2S. When patches of MnS are attached on the surface of La2O2S inclusion, AF nucleation capacity of RE-containing inclusion could enlarge obviously. The existence of manganese-depleted zone and low lattice misfit would be the main reason of La-containing inclusion inducing AF nucleation in C–Mn steel.

scholarly journals Improvement in Microstructure and Toughness of Large Heat-input Weld Bond of High Strength Steel Due to Addition of Rare Earth Metals and Boron

1977 ◽  
Vol 17 (7) ◽  
pp. 419-427 ◽  
Author(s):  
Tokushi FUNAKOSHI ◽  
Tomoo TANAKA ◽  
Syuzo UEDA ◽  
Masaaki ISHIKAWA ◽  
Noriaki KOSHIZUKA ◽  
...  
Keyword(s):  
Rare Earth ◽  
Heat Input ◽  
High Strength Steel ◽  
Rare Earth Metals ◽  
High Strength ◽  
Large Heat

Effect of Heat Input on Microstructure and Properties of Microalloyed C-Mn Steel Full Penetration Welded Joint Using Laser Welding

2016 ◽  
Vol 43 (1) ◽  
pp. 0103003
Author(s):  
王海生 Wang Haisheng ◽  
王晓南 Wang Xiaonan ◽  
张敏 Zhang Min ◽  
王卫 Wang Wei ◽  
朱国辉 Zhu Guohui ◽  
...  
Keyword(s):  
Laser Welding ◽  
Heat Input ◽  
Welded Joint ◽  
Microstructure And Properties ◽  
Full Penetration ◽  
Mn Steel

Effect of Heat Input on Microstructure and Mechanical Properties of Laser Welded Medium Mn Steel Joints

2018 ◽  
Vol 45 (11) ◽  
pp. 1102008 ◽  
Author(s):  
曹洋 Cao Yang ◽  
赵琳 Zhao Lin ◽  
彭云 Peng Yun ◽  
马成勇 Ma Chengyong ◽  
田志凌 Tian Zhiling ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Input ◽  
Microstructure And Mechanical Properties ◽  
Medium Mn Steel ◽  
Steel Joints ◽  
Mn Steel

Inclusion control in a 16 Mn Steel using a combined rare earth and calcium treatment

1991 ◽  
Vol 13 (4) ◽  
pp. 273-279 ◽  
Author(s):  
Longquan Shi ◽  
Jizhi Chen ◽  
Derek O. Northwood
Keyword(s):  
Rare Earth ◽  
Calcium Treatment ◽  
Mn Steel ◽  
Inclusion Control
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