scholarly journals Promotion of recycling of steel through suppression of surface hot shortness due to copper by physical metallurgy.

2001 ◽  
Vol 13 (3) ◽  
pp. 256-259
Author(s):  
Koji SHIBATA
Keyword(s):  
Physical Metallurgy ◽  
Hot Shortness ◽  
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

scholarly journals Susceptibility to Surface Hot Shortness of a Cu-containing Steel

2021 ◽  
Vol 1965 (1) ◽  
pp. 012096
Author(s):  
Lei Wang ◽  
Huaizhang Gu ◽  
Quan Li
Keyword(s):  
Hot Shortness ◽  
Surface Hot Shortness

Micro-Macro Modeling of Continuous Cast Steel to Simulate the Effect of Casting Velocity and Pouring Temperature on Copper Segregation

2012 ◽  
Author(s):  
A. Mehran Shahhosseini ◽  
Malur N. Srinivasan
Keyword(s):  
Cast Steel ◽  
Micro Model ◽  
Solute Redistribution ◽  
Continuous Cast ◽  
Pouring Temperature ◽  
Macro Model ◽  
Macro Modeling ◽  
Hot Shortness ◽  
Continuous Cast Steel ◽  
Surface Hot Shortness

One of the most serious problems in using recycled scrap for steel production is the occurrence of surface hot shortness during hot deformation due to the presence of copper in scrap. Copper causes surface hot shortness by liquid embrittlement. Therefore, the amount of the liquid copper-enriched phase penetrating into the grain boundaries should be identified in order to keep its effects within acceptable limits. In this regard, understanding the mechanism of segregation during solidification of steel is essential. This paper attempts to demonstrate micro-macro modeling of continuous cast steel to simulate the effect of casting velocity and pouring temperature on copper segregation. First, the temperature profiles at different times were determined using a finite element (macro) model and a segregation (micro) model based on Giovanola-Kurz approach is coupled with the macro model. It is necessary to couple the heat flow calculations from the macro model and the segregation calculations from the micro model because the rate of latent heat liberation is affected by the solute redistribution process, while the solute redistribution process depends on the cooling rates. As the casting velocity and pouring temperature strongly affect the solidification of continuous cast steel, they were chosen as the variables in this study. It is hoped that this study will enable the optimization of these variable to minimize the segregation of copper. This paper also demonstrates that by decreasing casting velocity and pouring temperature of a steel billet during continuous casting, solid-liquid interface moves faster to the center of the billet and there is less chance for diffusion of the residual elements in steel. Therefore, the chance of hot shortness of copper in the steel increases.

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