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

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 The Influence of the Calcium Treatment on the Mechanical Properties of Low Carbon Si-Mn Steel

1972 ◽  
Vol 58 (10) ◽  
pp. 1456-1462 ◽  
Author(s):  
Yoshio MIYASHITA ◽  
Katsuhiko NISHIKAWA
Keyword(s):  
Mechanical Properties ◽  
Low Carbon ◽  
Calcium Treatment ◽  
Mn Steel

Inclusion Control of Oil Drilling Steel SAE4137

2012 ◽  
Vol 581-582 ◽  
pp. 861-867
Author(s):  
Liang Chen ◽  
Tian Ming Chen ◽  
Yong Chen ◽  
Yao Xian Zeng ◽  
Ping Fan Li
Keyword(s):  
Oxygen Content ◽  
Molten Steel ◽  
Mechanical Performance ◽  
Refining Process ◽  
Control Technology ◽  
Calcium Treatment ◽  
Treatment Technology ◽  
Oil Drilling ◽  
Ladle Slag ◽  
Inclusion Control

In consideration of inclusion control in smelting drilling steel SAE4137 by convert process, the software FACTSAGE is applied on the deoxidation technology, composition of ladle slag and calcium treatment technology. The tests show that the deoxidation technology is reasonable and the oxygen content of molten steel is not more than 5×10-6 and 3.2×10-6 on average. The inclusion of bar is less and like a ball. The effect of calcium treatment is good. The inclusion is transformed in refining process, the absorbing ability to inclusion of ladle slag is strong. The level of any type of inclusion is not more than 1.5. The mechanical performance of SAE4137 bar meets the requirements, and the inclusion control technology does not influence the mechanical performance of bars.

Effect of rare-earth treatment on the banded microstructure and fracture properties of a 16 Mn steel

1992 ◽  
Vol 27 (19) ◽  
pp. 5343-5347 ◽  
Author(s):  
Longquan Shi ◽  
D. O. Northwood
Keyword(s):  
Rare Earth ◽  
Fracture Properties ◽  
Mn Steel

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

The Effect of Calcium Treatment on the Corrosion Resistance of Manganese Steels

2013 ◽  
Vol 668 ◽  
pp. 850-855
Author(s):  
Shan Chen ◽  
Xue Qun Chen ◽  
Lin Zheng ◽  
Guo Ming Li ◽  
Wan Shun Chang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Calcium Treatment ◽  
Nickel Chromium ◽  
Long Time ◽  
Carbon Manganese Steels ◽  
Corrosion Behaviors ◽  
The Common ◽  
Mn Steel ◽  
Manganese Steels

The metallurgy quality of the steel was improved greatly by calcium treatment which was a technique developed for a long time. The Mn steels treated with calcium, carbon-manganese steels and nickel-chromium steels were collected and their corrosion behaviors were investigated. The results showed that the corrosion resistance of the Mn steel is lower than that of the Ni-Cr steel. The shape of the inclusions can be modified and quality of the steels can be enhanced by the calcium treatment, and the corrosion resistance of the steel treated with calcium is higher than that of the common carbon-Mn steel, and near to that of the NiCr steel.

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