Fabrication of ZA Alloy Rods by Continuous Casting with Heated Mold

2003 ◽  
Vol 17 (08n09) ◽  
pp. 1503-1509
Author(s):  
Ma Ying ◽  
Hao Yuan ◽  
Feng Yun Yan ◽  
Hong Jun Liu ◽  
Chang Min Suh
Keyword(s):  
Continuous Casting ◽  
Directional Solidification ◽  
Surface Quality ◽  
Alloy Composition ◽  
Pressure Head ◽  
Outlet Temperature ◽  
Casting Method ◽  
Phase Zone ◽  
Two Phase

The continuous directional solidification technique of 5 kinds of special ZA alloys with eutectic, eutectoid and peritectic transformations under the condition of continuous casting by heated mold was studied. The optimum fitting range of technique factors in each alloy is found. The results show that the operation of guiding ingot is the key of the technique to produce directional solidification ZA alloy line by heated mold in continuous casting method. Outlet temperature, pulling speed, cooling condition, alloy composition and pressure head have direct influences on the surface quality of ingot. There is a balance between heat and force in the two-phase zone of solid and liquid. Only adjusting technique parameters with the balance and keeping a good place of the interface between solid and liquid, can the smooth ZA alloy line be continuously pulled out.

Experimental study on surface quality of silicon ingots prepared by electromagnetic continuous casting

2012 ◽  
Vol 15 (4) ◽  
pp. 340-346 ◽  
Author(s):  
Feng Huang ◽  
Ruirun Chen ◽  
Jingjie Guo ◽  
Hongsheng Ding ◽  
Yanqing Su ◽  
...  
Keyword(s):  
Experimental Study ◽  
Continuous Casting ◽  
Surface Quality ◽  
Electromagnetic Continuous Casting

scholarly journals External Surface Quality of the Graphite Crystallizer as a Factor Influencing the Temperature of the Continuous Casting Process of ETP Grade Copper

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6309
Author(s):  
Paweł Kwaśniewski ◽  
Paweł Strzępek ◽  
Grzegorz Kiesiewicz ◽  
Szymon Kordaszewski ◽  
Krystian Franczak ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Surface Quality ◽  
External Surface ◽  
Cooling System ◽  
Casting Process ◽  
Electrical Energy ◽  
Wire Drawing ◽  
Roughness Coefficient ◽  
Continuous Casting Process

Today’s world is a place where lack of electrical energy would be unimaginable for most of society. All the conductors in the world, both aluminum and copper, have their origin in various types of casting lines where the liquid metal after crystallization is being processed into the form of wires and microwires. However, the efficiency of the continuous casting processes of metals and the final quality of the manufactured product strictly depend on the design of the used crystallizers, the materials used during its production and its quality. Research conducted in this paper focuses on the latter, i.e., external surface quality of the graphite crystallizer at the place of contact with the primary cooling system. In order to quantify its influence on the continuous casting process numerical analyses using the finite element method has been conducted, which results have been further confirmed during empirical tests in laboratory conditions. It has been proven with all of the proposed methods that the temperature of the obtained cast rod is closely linked to the aforementioned surface quality, as when its roughness coefficient surpasses a certain value the temperature of the obtained product increases almost twofold from approx. 150–170 °C to 300–320 °C. These values might influence the quality and final properties of the cast rod, the susceptibility to wire drawing process and possible formation of wire drawing defects and therefore be of much importance to the casting and processing industry.

scholarly journals Scale Formation on HSLA Steel during Continuous Casting Part I: The Effect of Temperature–Time on Oxidation Kinetics

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1243 ◽  
Author(s):  
Rosa Maria Pineda Huitron ◽  
Pavel Ernesto Ramírez López ◽  
Esa Vuorinen ◽  
Pooria Nazen Jalali ◽  
Leonardo Pelcastre ◽  
...  
Keyword(s):  
Water Vapor ◽  
Continuous Casting ◽  
Oxide Scale ◽  
Surface Quality ◽  
Hsla Steel ◽  
Effect Of Temperature ◽  
Dry Air ◽  
Oxidation Rates ◽  
Steel Slabs

The findings in this work enhance the understanding of oxidation mechanisms and scale growth at high temperatures of a high strength low alloy (HSLA) steel for improving surface quality during continuous casting. The oxidation phenomenon was investigated under dry air and water vapor atmospheres by heating specimens at 1000, 1100, and 1200 °C at different holding times. Temperature and time had great effects on the kinetics, where faster (i.e., parabolic) oxidation rates were present under water vapor when compared with the dry air condition. Temperature strongly influenced the number of defects, such as pores, voids, gaps and micro-cracks, formed in the oxide scale. A phase analysis confirmed the presence of FeO as the first phase formed at the steel surface, Fe3O4 as the middle and thicker phase, and Fe2O3 as the last phase formed in the oxide/air interface. The micromechanics of the oxides demonstrated that a combination of phases with high (wüstite) and low plasticity (magnetite and hematite) could also have been the reason for the uneven cooling during Continuous Casting (CC) that resulted in the undesired surface quality of the steel slabs. This work gives a good look at the oxide scale effect on the surface quality of steel slabs through an understanding the kinetics during oxidation.

scholarly journals Continuous Casting and Rolling Technology at MKM Mansfelder Kupfer und Messing GmbH – Optimisation of the Surface Quality for Conti-M® Strip

2016 ◽  
Vol 854 ◽  
pp. 255-259
Author(s):  
Klaus Dieter Palm ◽  
Hendrik Busch ◽  
Axel Dusdorf
Keyword(s):  
Control System ◽  
Continuous Casting ◽  
Surface Quality ◽  
Rolling Process ◽  
Process Control System ◽  
Quality Development ◽  
The Impact ◽  
Rolling Technology ◽  
Process Product

Using Conti-M® which is a globally unique technology for producing cast-rolled copper strips, MKM has been able to link and optimise the continuous casting and rolling process together with the surface quality of milled strips. The last 15 years have seen many targeted projects for process, product and quality development. In this article, the process related challenges to optimise the surface quality of casting strip will be highlighted. We will present a process control system and the impact it had in the optimisation of the surface quality.

scholarly journals Mechanism Research and Discussion of the Quality of Precision Machining of a Fifth-order Variable-diameter Pipe Using Abrasive Flow

2020 ◽  
Vol 66 (6) ◽  
pp. 358-374
Author(s):  
Junye Li ◽  
Lixiong Wang ◽  
Hengfu Zhang ◽  
Jinglei Hu ◽  
Xinming Zhang ◽  
...  
Keyword(s):  
Surface Quality ◽  
Incident Angle ◽  
Precision Machining ◽  
Two Phase ◽  
Variable Diameter ◽  
Diameter Pipe ◽  
Order Variable ◽  
Solid Liquid ◽  
Fifth Order

The solid-liquid two-phase abrasive flow precision machining technology is widely used in aerospace, precision machinery, the automotive industry and other fields, and is an advanced manufacturing technology that effectively improves the inner surface quality of workpieces. In this paper, the fifth-order variable-diameter pipe parts are researched. By discussing the collision between the abrasive particles and the wall surface, it is revealed that the material removal of the workpiece is caused by plastic deformation, and the mechanism of precision machining of the abrasive flow is clarified. Through numerical analysis and experimental research, it is found that the incident angle can affect the precision machining quality of the abrasive flow. When the inlet velocity of the abrasive flow is 45 m/s and the incident angle is 15°, the fifth-order variable-diameter pipe can obtain the best surface quality. Abrasive flow machining improves the surface quality of small holes better than that of large holes. To obtain uniform surface quality, it is necessary to use two-way machining to perform abrasive flow machining. The surface texture of the fifth-order variable-diameter pipe workpiece after precision machining by abrasive flow becomes clear and smooth, and the surface quality is significantly improved. The research results can provide theoretical guidance and technical support for the popularization and application of solid-liquid two-phase abrasive flow precision machining technology, with significant academic value and application value.

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