scholarly journals Modelling of macrosegregation in large steel ingot with considering solid movement

2009 ◽  
Vol 58 (13) ◽  
pp. 104
Author(s):  
Liu Dong-Rong ◽  
Sang Bao-Guang ◽  
Kang Xiu-Hong ◽  
Li Dian-Zhong
Keyword(s):  
Steel Ingot ◽  
Large Steel ◽  
Solid Movement

scholarly journals Consideration on the Formation Mechanisms of Macroscopic Segregation in Large Steel Ingot or Casting

1971 ◽  
Vol 57 (10) ◽  
pp. 1654-1675 ◽  
Author(s):  
Koichi TASHIRO ◽  
Toru TODOROKI ◽  
Shigeo KIMURA
Keyword(s):  
Steel Ingot ◽  
Formation Mechanisms ◽  
Large Steel

scholarly journals Application of Heat Absorption Method to Improve Quality of Large Steel Ingot

2021 ◽  
Vol 61 (3) ◽  
pp. 865-870
Author(s):  
Chuanjun Li ◽  
Qiong Zhang ◽  
Longqiang Zhu ◽  
Weidong Xuan ◽  
Jiang Wang ◽  
...  
Keyword(s):  
Steel Ingot ◽  
Heat Absorption ◽  
Improve Quality ◽  
Absorption Method ◽  
Large Steel

Calculation of the Total Solidification Time for the 230t Large Steel Ingot

2012 ◽  
Vol 84 (1) ◽  
pp. 94-100
Author(s):  
Zhijun Ji ◽  
Shiqi Li ◽  
Yanlin Zhang ◽  
Guangwu Tang
Keyword(s):  
Steel Ingot ◽  
Solidification Time ◽  
Large Steel

Numerical Simulation of Filling Process in Large Steel-Ingot

2013 ◽  
Vol 395-396 ◽  
pp. 1212-1217 ◽  
Author(s):  
Zhao Hui Zhang ◽  
Lu Feng ◽  
Fu Cai Zhao
Keyword(s):  
Numerical Simulation ◽  
Initial Velocity ◽  
Steel Ingot ◽  
Three Dimensional ◽  
Experimental Result ◽  
Filling Process ◽  
Two Phase ◽  
Large Steel ◽  
Mould Filling ◽  
Gas Entrapment

A three dimensional incompressible gas-liquid two-phase flow model is proposed to accurately simulate the fluid flow of casting's mould filling process. The gas entrapment during mould filling is studied under different initial velocity and pressure conditions. The simulation results show that the velocity of change has a larger effect on gas entrapment, Initial velocity affects the distribution of temperature field,meanwhile gas entrapment parts specialized sampling is proceeded for qualitative detection at the scene. The simulated result is consistent with the experimental result, which can be reference for the process parameters selection and mold design of filling process in large steel-ingot. Keywords: gas entrapment, the filling process , the numerical simulation

scholarly journals Chemical and physical heterogeneities and gases in large steel ingot

2020 ◽  
Vol 96 (4) ◽  
pp. 3-9
Author(s):  
A.V. Narivskyi ◽  
◽  
A. N. Smirnov ◽  
N. I. Tarasevich ◽  
S. Ye. Kondratyuk ◽  
...  
Keyword(s):  
Cross Section ◽  
Steel Ingot ◽  
Dendritic Structure ◽  
Gas Content ◽  
High Tech ◽  
Large Steel ◽  
Technological Waste ◽  
Zonal Segregation ◽  
Cooling Intensity ◽  
Steel Ingots

For creation of the high-tech equipment that is used in energy, heavy engineering, chemistry and transport, the unique large-sized steel products are required. In the manufacture of such products, large forging ingots in the mass to 600 tons are used. However, an increase in the mass of the ingots leads to the formation of chemical and physical heterogeneity, enlargement and unfavorable distribution of non-metallic inclusions, of the development of segregation defects in them, which reduce the strength and exploitation characteristics of the metal. In this connection, the quality forgings and finished parts are not always meet the producing demands and the loss of metal, in the form of technological waste and rejects are reaching significant values. It is known that eccentric zonal segregation, especially it’s the most dangerous variety - cords, significantly reduce the quality and properties of products from large steel ingots. In connection with the continuous expansion of the production of large ingots, the problem of creating optimal technologies for their formation, which reduce or exclude the possibility of the formation of chemical heterogeneity and cords in steel during crystallization, it is currently important and relevant. In this paper it are presented the results of studies of the structure, gas distribution, physical and chemical heterogeneities in the cross section and height of an ingot in the mass of 140 tons, which was casted in vacuum from steel 25KHN3MFA. It is shown that depending on the temperature and time conditions of ingot hardening, among which the crystallization interval (due to the chemical composition of steels), cooling intensity in different volumes in height and cross section of ingot, temperature gradient before the crystallization front, solubility of alloying elements and gas content in the melt, etc. Based on this, when developing technology for large ingots to ensure their quality, optimal structure and properties should take into account not only their dimensions, but also the combination of these thermokinetic parameters on the crystallization process, dendritic structure formation, manifestations of liquation in different ingot volumes. Keywords: ingot, segregation strip and inclusions, dendrites, structure, oxygen, oxides, sulfides.

Sign in / Sign up

Export Citation Format

Share Document