hot scarfing slab china

Experimental and Numerical Analysis on Noise

In this study, we developed a detection algorithm using machine vision for faulty scarfing on slabs. Scarfing is a process for burning out defective areas on the surface of semi-finished steel ...

SCARFING

scarfing to whole surface scarfing of 2 perpendicular sides of the slab. The angle of the slab also eliminates the need for powerful granulation water sprays as the slag falls via …

CN109773150A

The present invention relates to steel-fastening detection systems in a kind of positioning of hot scarfing machine slab head and cleaning, it is made of PLC system, laser range finder, gage frame and cylinder mechanism, slab, slab conveying roller and hot scarfing machine, laser range finder is installed on gage frame and cylinder mechanism, gage …

Cold Scarfing Machines | Analytical Equipment | L-tec Steel …

These machines are capable of scarfing steel in a broad range of temperatures, from ambient to hot rolling temperature (21°C/70°F - 1092°C/2000°F). Two types of machine are available: "overhead" machines for scarfing the top and one edge of a slab in one pass, and "pass-through" machines for scarfing the four sides of slabs in a single pass.

Mechanization of slab scarfing

Collection of slag nd its removal are of importance for th normal operation ofthe assembly. At a scarfing rate of 10 m/rain the metal loss amounts to22 kg/m z.If we assume that for …

Processes | Free Full-Text | Numerical Investigation …

The corner defects in the casting slab greatly influence the product quality. These defects may extend during the heating and rolling process and even result in the discarding of the rolled plate as scrap. A …

Numerical Investigation of the Cleaning Flame Jet and …

steel companies in China have introduced scarfing machines and obtained great economic benefits [20–22]. Baosteel added a corner scarfing machine to solve the corner problems of casting slabs in 2020 [23]. The flame cutting process is very similar to the flame cleaning process. Some scholars study the basic theory of flame cutting.

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Auto defect-detector with scarfer for slabs; Slab jido check scarfing …

@misc{etde_590731, title = {Auto defect-detector with scarfer for slabs; Slab jido check scarfing sochi} author = {Nakayama, H, Mori, K, Matsuo, J, Konno, K, Sakakibara, M, and Sasamori, S} abstractNote = {Nippon Steel manufactures various kinds of steel sheets of a high grade such as hot-dip galvanized steel sheet, high-tensile steel …

Impulse torch for energy-saving slab scarfing

Download Citation | Impulse torch for energy-saving slab scarfing | Egon Eventz KG has developed an impulse torch that is capable of reducing the amount of energy consumed during slab scarfing and ...

Surface defects—evolution and behaviour from cast slab …

In summary, these trials showed that type A defects form at temperatures below 1100 °C, which occur during the later stages of hot rolling.Type B slivers form at temperatures in excess of 1100 °C; such temperatures occur in the steel during the early stages of hot rolling, slab reheating and casting.However, there is no further evidence to …

Ergonomics Analysis in the Scarfing Process by OWAS, …

In the finishing slab processes of steel, there are some processes such as cross transfer process, cooling bed, and scarfing process, the process which is done manually is scarfing [2]. During scarfing process, the operator is working with the position of standing and lifting scarfing machine with the weight up to 12 kilograms.

Hot Scarfing Machines | Products & Suppliers

Find Hot Scarfing Machines related suppliers, manufacturers, products and specifications on GlobalSpec - a trusted source of Hot Scarfing Machines information.

Modeling Steel Slab Heat Transfer During Scarfing …

• Selectively-scarfing slab edges can remove corner cracks 1. Before Scarfing 3. After Scarfing Cracks 2. During Scarfing ... slag_B is a tuning parameter accounting for the fraction of heat conducted from the hot slag into the steel slab and is found to be 5.43% TA is the temperature of the slag generated in region A (assumed to be 4000 oC ...

Cracking Mechanism of High Carbon Slab after Machine …

the slab therefore becomes deteriorated and provokes a quality problem in the downstream hot rolling process. As a result, the slab is sent for machine scarfing as the process parameters of the continuous casting exceed Fig. 1. Appearance of broken SK85 slab during hot rolling process. the control limit. An approximate layer of 2 mm thick-

Prevention of corner cracks in slab continuous casting

Surface corner cracks are sometimes observed on slabs of high strength low alloyed steel grades, requiring expensive scarfing. To avoid surface crack formation, we can act on the steel intrinsic ductility loss through the limitation of S and N contents: S < 30 ppm and N < 40 ppm are well adapted thresholds. A Ti/N ratio higher than 3.6 and a ...

Cracking Mechanism of High Carbon Slab after …

China Steel Corporation Hsiao Kang, Kaohsiung 81233, Taiwan, R.O.C. JIS SK85 high carbon steel is a newly-developed high-grade product in China Steel. In the early …

Mastering the technology and equipment in the slab …

Abstract. Oxygen-converter shop No. 1 at the Novolipetsk Metallurgical Plant has mastered the conditioning of slabs on hot-scarfing machines made by the Union Carbide …

Evertz Manual and machine flame scarfing

Slab scarfing: All surfaces, narrow sides and selective scarfing at speeds between 8 and 25 m/min. Scarfing widths from 100 mm to 450 mm; Water-cooled torches with customized designs ensure long reliable service life; …

Scarfing machine for scarfing hot and cold workpieces …

Scarfing machine ( 1 ) for scarfing hot and cold work pieces ( 2 ), such as slabs, blooms and billets made from steel in and downstream of continuous casting plants with a roller table ( 3 ) arranged in the direction of transport of the work piece, on which the work piece ( 2 ) to be scarfed can be moved back and forth. The scarfing machine ( 1 ) is set up in a …

Spot And Band-pass Scarfing Machines | Analytical …

L-TEC scarfing machines, having individually selected scarfing units, can be used for "spot" scarfing random defects from the slab surface, or for "band pass" scarfing, to scarf individual bands along the length of the slab where defects are commonly located, such as along the corner surfaces of cast slabs. ... full scarfing coverage of either ...

Scarfing

Scarfing or taper sanding of composite laminates can be achieved using a variety of methods, including the traditional manual technique using a high-speed pneumatic router or angle grinder (Baker, 2006).The accuracy and uniformity of the resulting scarf relies exclusively on the skills of the operator and the type of tools used. An example of manual …

Surface defects—evolution and behaviour from cast slab to …

Surface defects can evolve in a number of ways during the hot rolling of strip products. Over the past few decades the causes of many defects have been determined and countermeasures introduced, but one issue still remains unresolved. ... Mechanism of crack initiation and propagation in high-alloy steel slabs during the cooling and scarfing ...

Hot Scarfing Machines | Analytical Equipment | L …

All L-TEC scarfing machines for hot scarfing feature high-pressure water jets, which efficiently remove and granulate the scarfing slag from the steel surfaces.

TMS International

For more information, please contact: TMS International Surface Conditioning Hotline Phone: 1-800-560-7273 surfaceconditioning@tmsinternational

Mechanization and automation of scarfing slabs

the hot slabs are conditioned on the scarlet installed in the production line of the breakdown mill. In this case a continuous layer up to 2.5-3.0 mm thick is removed on two or all four longitudinal faces. ... The Units of the Fourth Type are designed for flame scarfing of hot slabs and can be set up as mechanized lines arranged along with the ...

Development of Hot Slab Surface Defect Detecting Device

Nippon Steel developed a unique high-accuracy hot slab surface defect detecting device ful­ly exploiting the high resolving power of photographs. The first device was installed in the slabbing mill at its Muroran Works. An outline of this device, which is showing favorable performance on a commercial basis, is given in this report.

Evertz Manual and machine flame scarfing

Scarfing times: Scarfing of one wide face of a 45 t slab, having a length of 13 m, a width of 2 000 mm and a thickness of 220 mm (= approx. 26 m2), takes approximately 6 minutes. Capacities: Depending on the individual customer requirements, capacities of more than 100 000 t per month are readily possible.

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Improvement of bloom surface quality in the hot scarfing …

Unlike the flat surface scarfing process, the flame jet and the shape of the molten pool have an essential impact on the effectiveness of the flame cleaning in the corner of the casting slab.