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Study and Minimization of Surface Defects on Bars and …

Keywords: Continuous Casting, Billet Casting, Cast Defects, Rolling, Surface Defects. I. INTRODUCTION Casting of carbon steel billets for commercial products usually implies silicon and manganese oxidation, and is ... Study and Minimization of Surface Defects on Bars and Wire Rod Originated in Continuous Cast Billets.

Metallurgical Processes and Defects in Steel Products ...

Metallurgical Processes and Defects in Steel Products. ... The defects picked up during these processes are (i) casting defects, (ii) rolling defects, (iii) forging defects, and (iv) welding defects. (Fig 1).These defects are described below. Fig 1 Metallurgical processes and steel product defects.

MINIMIZATION OF SURFACE DEFECTS ON BARS AND …

MINIMIZATION OF SURFACE DEFECTS ON BARS AND WIRE ROD ORIGINATED IN BILLET CASTING(1) Cristian Genzano (2) ... Bar cut due to a cobble during rolling of rebar.

ASSESSMENT OF SURFACE DEFECTS IN THE …

ASSESSMENT OF SURFACE DEFECTS IN THE CONTINUOUSLY CAST STEEL ... (240 x 270 mm), for subsequent re-rolling. The share of continuously cast bloom of the total continuously cast steel is 50-60%, the balance being ... defects, mechanical defects and deviations from the

Seams in Steel Rebars - Metal and Metallurgy engineering ...

Good day for all, I want to ask about seam defect in steel rebar , its appearing in higher rolling sizes only more than 25 mm , but its disconitnuous.do you know how its generating from Rolling Mill or Caster.

Hot rolling and rolling defects - NPTEL

1. Hot rolling and rolling defects: 1.1 Front and back tensions: We have seen that the rolling load is dependent on roll diameter, higher the roll dia, higher the roll force. Similarly, smaller reductions requires lower roll force. In order to reduce the roll force, we can reduce roll diameter, or reducing the friction.

Split Ends and Cracking Problem During Hot Rolling of ...

Split Ends and Cracking Problem During Hot Rolling of Continuously Cast Steel Billets ... Defects on the Rebar Rolling Line of Goroh Melli Fould Company ... end and cracking problem during hot ...

DEFECTS - METAL WORKING AND ROLLED PRODUCTS

DEFECTS - METAL WORKING AND ROLLED PRODUCTS ... Defects in Rolled Products a) General b) Operational a) General ... When the rolling conditions a re such that only surface of the work piece is deformed. The cross section of the slab is deformed into the shape as shown.

Dimensional measurement of rod, bar and rebar | LAP

Use LAP optical measurement systems to measure the dimensions and straightness, as well as the surface defects and rolling errors of bars. Whether in the construction industry, automotive industry, shipbuilding, or machine and plant construction: bar steel and rebar is processed in various industries.

Seams On Rolled Steel Products | Speaking of Precision Blog

Seams On Rolled Steel Products ... Are there rolling-related defects that are transverse to rolling direction; i.e. perpendicular to seams? Reply. speakingofprecision says: February 7, 2013 at 10:45 am ... There is a significant improvement on the surface of rebar.

IDENTIFICATION OF IMPACTING FACTORS OF …

IDENTIFICATION OF IMPACTING FACTORS OF SURFACE DEFECTS IN HOT ROLLING PROCESSES USING MULTI-LEVEL REGRESSION ANALYSIS Nong Jin and Shiyu Zhou Department of Industrial Engineering University of Wisconsin Madison, Wisconsin Tzyy-Shuh Chang OG Technologies, Inc. Ann Arbor, Michigan KEYWORDS Hot Rolling Processes, Multi-Level Poisson …

Rolling (metalworking) - Wikipedia

Defects. In hot rolling, if the temperature of the workpiece is not uniform the flow of the material will occur more in the warmer parts and less in the cooler. If the temperature difference is great enough cracking and tearing can occur. Flatness and shape. In a flat metal workpiece, the flatness is a descriptive attribute characterizing the ...

Technical Report UDC 621 . 771 . 25 Progress of Bar and ...

Progress of Bar and Wire Rod Rolling Process, and Improvement of Basic Quality Shohhei SAKIYAMA* Keisuke SAITOH ... reducing surface defects, and introducing controlled rolling technology have been implemented. Furthermore, a novel continuous ... rolling mills (8 stand roughing rolling mill, 4 stand intermediate

Manufacturing Process Routes for Reinforcing Steels

Hot rolling Cold processing Decoiling Fabrication Manufacture of welded fabric Electric Arc Furnace ... reinforcing steel. Typically an EAF melt shop is linked with a rolling mill, ... defects such as internal cracks, porosity and segregation, which are a

Understanding Rolling Process in Long Product Rolling …

Understanding Rolling Process in Long Product Rolling Mill ... (free from surface defects), (ii) maximum productivity at the lowest cost, (iii) minimum roll wear, (iv) easy working, and (v) optimum energy utilization.

Advanced Process and Quality Control in Hot Rolling …

Defects stem from a variety of causes such as poor billet quality, worn rolling mill parts, and process malfunctions. Detectable defect types are many and include shells, cracks, pinholes, scabs, inclusions, laps and overlaps (Figure 2), as well as repetitive defects ECNDT 2006 - We.1.8.3 1

thread rolling defects for sale, thread rolling defects of ...

thread rolling machine,thread rolling machine,rebar paralleled threading machine Rebar thread rolling machine is mainly used in processing straight thread head of 12-40mm HRB335, HRB400 reinforcing steel bar. rebar thread rolling machine,thread rolling.....