Microstructural Characterization of Non-Oriented Low Silicon Steel Produced by Compact Strip Production

2010 ◽  
Vol 168-170 ◽  
pp. 827-831
Author(s):  
Yun Li Fu ◽  
Kai Ming Wu
Keyword(s):  
Electron Microscopy ◽  
Continuous Casting ◽  
Microstructural Characterization ◽  
Casting Process ◽  
Rolling Process ◽  
Compact Strip Production ◽  
Fine Grained ◽  
Direct Rolling ◽  
Hot Rolled ◽  
Strip Production

The macro structures, microstructures, textures and precipitates in non-oriented electrical steels were studied by means of optical microscopy, scanning electron microscopy (SEM), electron back scattering dispersion (EBSD) and transmission electron microscopy (TEM) in the specimens produced by conventional continuous casting process and thin slab continuous casting and direct rolling process. Results showed the macro structures in as-cast slabs and the microstructures in as-rolled strips were more fine-grained and uniform with regard to compact strip production (CSP) process, compared with that in conventional process. No obvious texture was observed in hot rolled strips produced by CSP process.

Mechanical Properties of Heat Treated 65Mn Steel Produced by Compact Strip Production

2010 ◽  
Vol 168-170 ◽  
pp. 832-836
Author(s):  
Gang Huang ◽  
Guo Hua Jiao ◽  
De Zhi Wen ◽  
Chun Quan Zhou ◽  
Kai Ming Wu
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Continuous Casting ◽  
Casting Process ◽  
Continuous Casting Process ◽  
Compact Strip Production ◽  
Fine Grained ◽  
Heat Treated ◽  
Strip Production

The mechanical properties of the heat treated 65Mn steel that produced by CSP (Compact Strip Production) and conventional continuous casting process were investigated. Measured results showed that 65Mn steel produced by CSP exhibits higher hardness than that produced by conventional continuous casting process. The better mechanical property was attributed to fine-grained microstructures in the as-rolled CSP strips.

Mechanical Properties of Heat Treated 30CrMo Steel Produced by Compact Strip Production

2010 ◽  
Vol 97-101 ◽  
pp. 1065-1068
Author(s):  
Guo Hua Jiao ◽  
Gang Huang ◽  
De Zhi Wen ◽  
Chun Quan Zhou ◽  
Kai Ming Wu
Keyword(s):  
Mechanical Properties ◽  
Continuous Casting ◽  
Casting Process ◽  
Continuous Casting Process ◽  
Compact Strip Production ◽  
Fine Grained ◽  
Heat Treated ◽  
Strip Production

Mechanical properties of heat treated 30CrMo steel produced by CSP (Compact Strip Production) and conventional continuous casting process. Results showed that 30CrMo steel produced by CSP exhibits higher hardness than that produced by conventional continuous casting process. The higher hardness was attributed to fine-grained microstructures in the as-rolled CSP strips.

Achievements of Endless Strip Production in Rizhao Steel

2019 ◽  
Vol 944 ◽  
pp. 344-350
Author(s):  
Peng Tian ◽  
Yong Lin Kang ◽  
Jing Tao Zhu ◽  
Zhe Qin ◽  
Xu Tao Zheng ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Continuous Casting ◽  
Low Cost ◽  
Green Manufacturing ◽  
Casting Process ◽  
Rolling Process ◽  
Thin Strip ◽  
Accident Rate ◽  
Yield Rate ◽  
Strip Production

The equipment and technology characteristics of endless strip production line in Rizhao steel were analyzed and the achievements of endless strip production in Rizhao steel were illustrated with detailed productive data in 2017. The achievements of endless continuous casting process was introduced from the aspects of the mold level deviation, the casting speed and the tundish temperature. The achievements of endless continuous rolling process was described from the rolling length, the mechanical properties and the microstructure at different position along the width. The achievements of endless continuous casting and rolling process was discussed from the product qualification rate, the yield rate, the thin strip ratio, the accident rate and the energy consumption. The productive practice of endless strip production (ESP) shows that the longest number of continuous casting furnace reached to 15 heats (4500 tons), the longest rolling length in single casting period was 182 km, the qualified rate of products was up to 99.73%, the yield rate was up to 97.51% and the thin strip ratio had a maximum value of 40.57%. At the same time, its accident rate was below 2.02% and its energy consumption was less than 27.26 kgce·ton-1. These achievements indicated that the ESP line in Rizhao steel had the advantages of low cost, good performance and green manufacturing, so the endless rolling technology will be rapidly promoted and the hot rolled thin products by ESP will further expand the market.

scholarly journals Effect of rapid heating process in hot stamping on compact strip production hot rolled plate

2018 ◽  
Vol 15 ◽  
pp. 1055-1061
Author(s):  
Bin Zhu ◽  
Jia Zhu ◽  
Zhoujie Zhu ◽  
Yilin Wang ◽  
Yisheng Zhang
Keyword(s):  
Rapid Heating ◽  
Hot Stamping ◽  
Rolled Plate ◽  
Heating Process ◽  
Compact Strip Production ◽  
Hot Rolled ◽  
Strip Production

Potential of Hot Rolled Dualphase Steel from Compact Strip Production CSP® in Automotive Applications

2012 ◽  
Vol 706-709 ◽  
pp. 2278-2283
Author(s):  
Carl Peter Reip ◽  
Christian Klinkenberg ◽  
Long Chang Tong ◽  
Pavel Hora
Keyword(s):  
Mechanical Properties ◽  
Forming Limit ◽  
Thin Slab ◽  
Forming Simulation ◽  
Thin Slab Casting ◽  
Hot Strip ◽  
Slab Casting ◽  
Direct Rolling ◽  
Hot Rolled ◽  
Strip Production

Industrial thin slab casting and direct rolling processing started in 1989 with the world’s first CSP® plant at Crawfordsville (USA). Since this time CSP® and competing thin slab casting and direct rolling concepts have been developed to a standard process for hot strip production [1]. Typical features of the CSP® process are the homogeneous structural and mechanical properties all along the strip. Direct hot rolling of thin slabs may be followed by a well defined cooling pattern to produce hot strip from high strength multiphase steel, like dualphase (DP) grades, on the runout table. These steel grades are characterized by a favorable combination of strength and ductility based on hard martensitic particles embedded in a ductile ferritic matrix. This paper highlights the mechanical properties of hot rolled DP steel from CSP® production. To this purpose, multiple tests and modeling have been applied to determine e.g. r-values, forming limit curves and yield locus. In addition, forming simulation as well as laboratory and industrial deep drawing tests have been performed.

Analysis of the defects occurrence on the functional surfaces of individual mould segments for the tyre production from AlSi7Mg0.3Sr

2020 ◽  
Vol 234 (17) ◽  
pp. 3474-3483 ◽  
Author(s):  
I Hren ◽  
S Michna ◽  
J Svobodova ◽  
L Michnova ◽  
L Benes
Keyword(s):  
Electron Microscopy ◽  
Cross Sections ◽  
Surface Defects ◽  
Subsurface Layer ◽  
Light And Electron Microscopy ◽  
Microstructural Characterization ◽  
Casting Process ◽  
Functional Surface ◽  
X Ray ◽  
Functional Surfaces

The basic prerequisite for obtaining a quality casting according to the requirements and specifics of the customer is the production of the mould (in our case using low-pressure die-casting) without the occurrence of surface defects in the form of cracks, scabs, microshrinkages and local depressions. In this case, the mould segments for the tyre production are those which show tiny cracks or scabs on the functional surface of the castings that define the surface quality of the resulting product. It is necessary to analyse these defects in order to eliminate the causes of their formation in the casting process. For this reason, a new alloy of eutectic silumin AlSi9 alloyed with Mg, Mn and modified Sr was prepared in order to improve the fluidity and maintain the mechanical properties of the material up to 250 ℃ The subject of the study was the analysis of the surface defects of the mould, including the analysis of the chemical composition (energy-dispersive X-ray) and microstructure in the defect area. In order to investigate the subsurface layer of defects, metallographic specimens of cross-sections were prepared by means of mould, which were examined by light and electron microscopy. The detailed microstructural characterization of individual elements was performed on lamellas of the mould studied using transmission electron microscopy. An X-ray diffraction analysis was performed to investigate the residual stress at the defects area very closely. It has been found that a smaller number of defects on the functional surfaces can be obtained by changing the mould position during casting.

The effect of casting speed on slag-inclusion defects in 1050 × 200 mm ultra-low-carbon automobile steel slabs

2021 ◽  
Vol 118 (6) ◽  
pp. 611
Author(s):  
Shujun Li ◽  
Xueyan Du
Keyword(s):  
Continuous Casting ◽  
Casting Speed ◽  
Nail Plate ◽  
Casting Process ◽  
Slag Inclusion ◽  
The Other ◽  
Low Carbon ◽  
Automobile Steel ◽  
Steel Slabs ◽  
Hot Rolled

The effect of casting speed on slag-inclusion defects in 1050 × 200 mm ultra-low-carbon automobile steel (UAS) slabs was studied by performing nail plate experiments and by monitoring the liquid level fluctuations during the continuous casting process. The number, location, length, and proportion of slag-inclusion defects in hot-rolled coils produced at different casting speeds were analyzed. The results showed that the defects in the hot-rolled coils were mainly owing to the mold protective slag. For the continuous casting speed of 1.6 m/min, the fraction of slag-inclusion defects was the lowest (at 5.3%), and the number of slag-inclusion defects was lower than for the other casting speeds. The length of slag inclusions was under 900 mm. Furthermore, the number of slag-inclusion defects on the upper and lower surfaces was smaller than those for the other casting speeds. At different casting speeds, slag-inclusion defects mainly existed within 100 mm of the edge on both surfaces of hot-rolled coil plates. The fluctuation within the 0–1 mm range was 98.1% for the casting speed of 1.6 m/min, indicating that the flow rate of molten steel on both sides of the nozzle was relatively stable, which helps to control slag-inclusion defects in hot-rolled coils.

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