Prevention of surface hot shortness, development of banded structure, and mechanical properties of hot rolled Cu-bearing steel

2016 ◽  
Vol 68 ◽  
pp. 132-137 ◽  
Author(s):  
Saeed Deldar ◽  
Hamed Mirzadeh ◽  
Mohammad Habibi Parsa
Keyword(s):  
Mechanical Properties ◽  
Bearing Steel ◽  
Banded Structure ◽  
Hot Shortness ◽  
Hot Rolled ◽  
Surface Hot Shortness

scholarly journals Influence of Thermal History on Surface Hot-shortness of Cu-Sn Bearing Steel

2002 ◽  
Vol 88 (3) ◽  
pp. 142-147 ◽  
Author(s):  
Masaharu HATANO ◽  
Kazutoshi KUNISHIGE ◽  
Yuichi KOMIZO
Keyword(s):  
Thermal History ◽  
Bearing Steel ◽  
Hot Shortness ◽  
Surface Hot Shortness

The Effect of Large Reduction on the Microstructure and Properties for As-Hot Rolled Dual-Phase Nb-Bearing Steel

2011 ◽  
Vol 284-286 ◽  
pp. 1101-1105
Author(s):  
Hong Mei Zhang ◽  
Li Feng Qiao
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Yield Strength ◽  
Dual Phase Steel ◽  
Bearing Steel ◽  
Dual Phase ◽  
Large Reduction ◽  
Microstructure Refinement ◽  
The Matrix ◽  
Hot Rolled

The effect of reduction on the microstructure refinement and mechanical properties of the as-hot rolled dual-phase Nb-bearing steel were studied at laboratory. It is found that the dual-phase steel displays clearly classic dual phase morphology which is ferrite and martensite or bainsite, and the fine island or lath martinsite is dispersed on the matrix of ferrite by the observation of microstructure. The grain can be refined, and the increased precipitated second particles are fined and dispersed with the increasing of reduction. The mechanical properties determination result shows that the mechanical properties have greatly improved by large reduction. The tensile strength obtained in the laboratory is up to 680MPa, the ratio of yield strength and tensile strength is low, and the elongation is better.

scholarly journals Microstructure and Mechanical Properties of Novel Quasibinary Al-Cu-Yb and Al-Cu-Gd Alloys

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 476
Author(s):  
Sayed Amer ◽  
Ruslan Barkov ◽  
Andrey Pozdniakov
Keyword(s):  
Mechanical Properties ◽  
Tensile Properties ◽  
Mechanism Of Action ◽  
Annealing Temperature ◽  
Eutectic Reaction ◽  
Solidification Process ◽  
Annealed State ◽  
Microstructure And Mechanical Properties ◽  
Cold Rolled ◽  
Hot Rolled

Microstructure of Al-Cu-Yb and Al-Cu-Gd alloys at casting, hot-rolled -cold-rolled and annealed state were observed; the effect of annealing on the microstructure was studied, as were the mechanical properties and forming properties of the alloys, and the mechanism of action was explored. Analysis of the solidification process showed that the primary Al solidification is followed by the eutectic reaction. The second Al8Cu4Yb and Al8Cu4Gd phases play an important role as recrystallization inhibitor. The Al3Yb or (Al, Cu)17Yb2 phase inclusions are present in the Al-Cu-Yb alloy at the boundary between the eutectic and aluminum dendrites. The recrystallization starting temperature of the alloys is in the range of 250–350 °C after rolling with previous quenching at 590 and 605 °C for Al-Cu-Yb and Al-Cu-Gd, respectively. The hardness and tensile properties of Al-Cu-Yb and Al-Cu-Gd as-rolled alloys are reduced by increasing the annealing temperature and time. The as-rolled alloys have high mechanical properties: YS = 303 MPa, UTS = 327 MPa and El. = 3.2% for Al-Cu-Yb alloy, while YS = 290 MPa, UTS = 315 MPa and El. = 2.1% for Al-Cu-Gd alloy.

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