A New Method to Reduce the Shielding Effect of Copper Mold in the Bloom Continuous Casting with M-EMS

JOM ◽  
2022 ◽  
Author(s):  
Dongbin Jiang ◽  
Lifeng Zhang
Keyword(s):  
Continuous Casting ◽  
New Method ◽  
Shielding Effect ◽  
Copper Mold ◽  
Effect Of Copper

Correlation of the diamond/matrix interphase zone structure with tool efficiency obtained by technology combining diamonds metallization with matrix sintering

2019 ◽  
pp. 111-123 ◽  
Author(s):  
P. P. Sharin ◽  
M. P. Akimova ◽  
V. I. Popov
Keyword(s):  
Thermal Diffusion ◽  
Shielding Effect ◽  
Specific Productivity ◽  
Grinding Wheel ◽  
Zone Structure ◽  
Chromium Powder ◽  
Carbide Matrix ◽  
Diffusion Metallization ◽  
Effect Of Copper ◽  
Diamond Retention

The paper studies structure and phase characteristics of the interphase zone diamond/matrix in dressers made by thermal diffusion metallization of a diamond combined with matrix sintering based on WC–Co and Cu impregnation. The compact arrangement of chromium powder particles around diamond grains and the shielding effect of copper foil create favorable conditions for thermal diffusion metallization of diamond at matrix sintering. A metallized coating chemically bonded with diamond and consisting of chromium carbide and solid solution of cobalt in chromium phases provides a strong diamond retention in the carbide matrix. It was shown that it is formed on the surface of the diamond under the conditions specified in the experiment and the temperature – time sintering mode. The specific productivity of experimental dresser made by hybrid technology at straightening green silicon carbide grinding wheel equaled 51.50 cm3/mg exceeding that of the control dresser made without metallization of diamonds by sintering with copper impregnation by 44.66%.

A new method for detecting intramolecular H-bonds of aromatic amides based on de-shielding effect of carbonyl on β-protons

2021 ◽  
Author(s):  
Jing Min ◽  
Chunyu Wang ◽  
Liyan Wang
Keyword(s):  
Charge Transport ◽  
New Method ◽  
Shielding Effect ◽  
Aromatic Amide

Aromatic amide foldamers with highly predictable conformations possess the potential of application in the fields of stereoselective recognition, charge transport and catalysis, whose conformations are commonly limited by the intramolecular...

CC-DHCR PLANNING AND SCHEDULING METHOD BASED ON SLAB CLUSTER

2008 ◽  
Vol 07 (02) ◽  
pp. 249-252 ◽  
Author(s):  
HELAN LIANG ◽  
SUJIAN LI
Keyword(s):  
Continuous Casting ◽  
Production Process ◽  
Dynamic Scheduling ◽  
New Method ◽  
Scheduling Problem ◽  
Scheduling Problems ◽  
Planning And Scheduling ◽  
Scheduling Method

Focusing on the limitations of the traditional Continuous Casting-Direct Hot Charge Rolling (CC-DHCR) planning and scheduling methods that rarely consider dynamic scheduling problems, a new method is put forward. The key idea is to make out clusters and integrated plans in the planning layer, and then to adjust the rolling sequences according to the slab cluster-based strategy in the dynamic scheduling layer. Results of the test with data from practical production process show that the method can effectively solve the CC-DHCR planning and scheduling problem and increase the DHCR ratio.

scholarly journals Development of Method Enhanced Laser Ablation Efficiency According to Fine Curvature of the Polymer through the Preliminary Preparation Process Using UV Picosecond Laser

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 959 ◽  
Author(s):  
Seung Sik Ham ◽  
Ho Lee
Keyword(s):  
Laser Processing ◽  
Pulsed Laser ◽  
Picosecond Laser ◽  
Processing Method ◽  
New Method ◽  
Shielding Effect ◽  
Ablation Efficiency ◽  
Preliminary Preparation ◽  
Ultrashort Pulsed Laser ◽  
New Processing

In processes using the ultrashort pulsed laser, the phenomenon that the ablation efficiency is reduced due to the increase of the shielding effect of the generated plume is increasingly caused by the use of the high power and high repetition rate. A new method is needed to prevent a decrease in ablation efficiency in processing using an ultrashort pulsed laser. In this study, the proposed a processing method that can improve the ablation efficiency by providing an efficient escape path of plume, and examine the feasibility of a new processing method. The new method we proposed is a method of laser processing after generating a fine curvature in the polymer as a preliminary preparation. The fine curvature of the polymer produced by the preliminary preparation induces an artificial chimney-like opening along the path of the incident beam during laser processing, thereby enabling the plume to be effectively removed. The experiment for examine the feasibility through a new method was conducted using a 10-picosecond laser of UV wavelength with two optical systems. As a new processing method, when processing with ultrashort pulse laser, it was observed that the ablation efficiency improved.

Production of Magnesium Alloy Billets by Semisolid Continuous Casting

2009 ◽  
Vol 610-613 ◽  
pp. 1403-1406 ◽  
Author(s):  
Futoshi Kido ◽  
Tetsuichi Motegi
Keyword(s):  
Grain Size ◽  
Magnesium Alloy ◽  
Continuous Casting ◽  
Mobile Phone ◽  
Electric Furnace ◽  
Copper Mold ◽  
Cooling Plate ◽  
Continuously Cast ◽  
The Difference ◽  
Molten Magnesium

In order to produce AZ91 and AZ31 magnesium alloy billets semisolid continuous casting by using an inclined cooling plate was carried out. The molten magnesium alloy in an electric furnace was flowed on the inclined cooling plate and then poured in a tundish. The slurry prepared using this process was solidified by drawing a dummy bar from a water-cooled copper mold, consequently producing a billet. As a result, we could produce the magnesium alloy billets by semisolid continuous casting. Magnesium alloy billets with refined and globular primary α crystals were successfully and continuously cast by optimizing the solidification conditions. In this case, the grain size of AZ91 billets was about 55μm and that of AZ31 billets was 50μm. The AZ91 billets produced by semisolid continuous casting were employed in thixocasting experiments. The experiments revealed that thixocasting could produce the mobile phone casings with spherical primary α crystals at 858K. Moreover, we proved that the difference of shot cycle did not influence the microstructures for up to 251 shots.

Copper Mold for Continuous Casting of Steel: Modelling Strategies to Assess Thermal Distortion and Durability

2017 ◽  
Vol 754 ◽  
pp. 287-290 ◽  
Author(s):  
L. Moro ◽  
J. Srnec Novak ◽  
D. Benasciutti ◽  
F. de Bona
Keyword(s):  
Continuous Casting ◽  
Permanent Deformation ◽  
Stress Rupture ◽  
Mechanical Analysis ◽  
Cyclic Plasticity ◽  
Continuous Casting Of Steel ◽  
Copper Mold ◽  
Modelling Strategies ◽  
Durability Assessment ◽  
Damage Law

In this work the durability assessment and the permanent deformation of a copper mold for continuous casting of steel have been investigated using mathematical models based on the Finite Element method. The cyclic plasticity behavior of the material is represented by a combined kinematic-isotropic model experimentally validated. Results from thermo-mechanical analysis are in good agreement with measurements. In particular, creep effects included into the model permit the evolution of bulging near the meniscus area to be correctly predicted. A life estimation is performed considering strain-life and stress-rupture time curves according to a cumulative damage law.

A new method of continuous casting of copper billets by a combination of AC current and magnetic fields

2009 ◽  
Vol 30 (10) ◽  
pp. 4565-4569 ◽  
Author(s):  
Jianbo Yu ◽  
Jianming Jiang ◽  
Zhongming Ren ◽  
Weili Ren ◽  
Kang Deng
Keyword(s):  
Magnetic Fields ◽  
Continuous Casting ◽  
New Method ◽  
Ac Current
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