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Forged Shaft. 42CrMo, 36CrNiMo4. 35 ~ 45 HSC. MBI Rolls, a division of M. Brashem, Inc., has provided the best value for quality, price and service to the steel industry for more than 30 years. We are a leading distributor of mill rolls to the north American steel mill industry, with significant share of the long bar market.
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The dispersion of medium to high viscous millbase can be achieved by our fully hydraulic Three roll mill. The shearing force created between the array of horizontally mounted counter rotating rolls helps in dispersion of the millbase like printing inks, industrial & decorative paints, artists' colours, chocolate, foodstuff, cosmetic products, etc.
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Reasons for Mill Roll Cracks. Owing to the high wear resistance and minimal plastic deformation of the cold mill roll, it is required that the surface of the cold mill roll have higher hardness and thicker hardening layer.The material of cold roll is 9Cr2Mo. The surface hardness of HS96 is obtained by surface quenching and tempering.
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The hardness test of forging steel rolls in China always use HB and HSD, among which HB is only suitable for low hardness roll detection. For the hardness testing of high-hardness forged steel cold rolling mill rolls, HV, Leeb and Shore hardness always been used internationally. Due to some characteristics of the forged steel roll, such as ...
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Our roller mills are capable of comminuting very hard through to soft products homogeneously and with a minimum fine material content, depending on requirements, to a reduction ratio of between 1:5 and 1:1.5 and our double-roller mills to a Mohs hardness of up to approx. 8.5. Single-roller mill
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• Stock – over 1/2" mill special 20M# min. • Hardness guaranteed to 360 min Brinell • Used for severe sliding abrasion with forming AR 200 3/16 - 3/8 Hot form Can be cold formed • Stock • Typical hardness range of 185-235 Brinell • Used for sliding-type abrasion ALLOY ASTM A 514 aka T1* 1/4 - 2-1/2 100 110 90° 2 t transverse
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These rolls are usually heat treated, the hardness range is 35 -55 deg Shore and they are commonly used as back-up rolls in 4-high rolling mills. An alloy steel containing tungsten (W) and with a hardness of 40 – 50 deg Shore is very resistant to fire cracking and is sometimes used for roughing rolls in hot strip mills.
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First, the billet is heated and compressed into a large roll. While still hot, it passes through a series of rotating rollers to achieve the desired dimensions. In sheet metal production operations, the rolled steel is then wound into coiled rolls and left to cool. In production operations involving other forms, the processed material is cut ...
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High Temperature Hardness of Matrix 0 100 200 300 400 500 600 700 800 0(R.T.) 200 400 600 700 Temperature 'C ICDP H/Cr HSS Hardness (HSC) Since 1915, Metals, Ltd. has been a leading roll manufacturer. Through constant study and research, has kept abreast of the demands and advances of the industry. Today, is a full-line roll
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Sendzimir Mill Roll Maintenance. Because of its high rolling speed and precision, the Sendzimir mill is favored by some high-end users for rolling ultra-thin strips and silicon steel, stainless steel and so on. The mills of the Sendzimir mill use tool steel, abrasive steel, and high-speed steel. Higher quenching and tempering temperatures are ...
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High Hardness The high hardness and great depth of hardness are needed for cold reduction mills. Increased Heat Resistance With the strong heat resistance, the roll can be capable of retain high hardness with the roll under continuous and constant heating rate No Metallurgical Flaws High Resistance
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Depending on the amount of compression, different mechanical properties and hardness properties are achieved in the finished product. Through cold reduction, the thickness of the metal can be reduced by processing steel strip through a sequence of tandem rolling mill stands. The rolls on these stands are stacked vertically and powered by huge ...
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Cold Rolled Strip Steel Finishes. Cold-rolled strip steel finishes are usually specified to one of the finishes below. Number 1 or Matte (Dull) Finish: A finish without luster produced by rolling on rolls roughened by mechanical or other means. This finish is especially suitable for paint adhesion.
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Adequate water cooling of roll is required. Wide range of hardness/composition for a variety of applications is available to suit a particular mill stand. Applications: Intermediate/Finishing stand of Wire Rod Mills, TMT Mills, Merchant Mills and Structural Mills. Finishing stand of Strip, Sheet and Flat rolling mills. Common Grades:
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Roll hardness – Hardness of the material of a roll is to be optimum. Higher hardness improves wear resistance but increases the risk of roll failure. Higher hardness also creates issues during machining and grinding of the rolls. It is not a fact that everything improves in the roll if hardness is higher. In fact opposite is valid.
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PHYSICAL METALLURGY OF A HSS MATERIAL FOR HOT ROLLING MILL ROLLS Jacqueline LECOMTE-BECKERS 1 Jerome TCHOUFANG TCHUINDJANG 1 Eric PIRARD 2 Jean-Pierre BREYER 3 ABSTRACT High Speed Steel (HSS) cast rolls are used in front finishing stands of hot strip mills. Good wear resistance and hardness at high temperatures, are defining features of …
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Hardness Conversion Mill Roll Specialist is committed to provide the highest quality products possible through our highly skilled and dedicated work force and state-of-art manufacturing process. We pursue an aggressive outgoing research and development program thus ensuring ourfuture as a leader in Roll casting metallurgy in Asia.
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GB/T 13313-2008 English Version - GB/T 13313-2008 Methods of shore and leeb hardness testing for rolls (English Version): GB/T 13313-2008, GB 13313-2008, GBT 13313-2008, GB/T13313-2008, GB/T 13313, GB/T13313, GB13313-2008, GB 13313, GB13313, GBT13313-2008, GBT 13313, GBT13313
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Modern, efficient cold rolling mills can roll pickled sheets or strips at speeds of up to 4 m/s and tandem mills that are continuously working can produce up to 2.5 million tons of cold rolled steel annually. The advantages of cold rolling. Cold rolled products have the following advantages over hot rolled: greater dimensional accuracy
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In a method of testing for and preventing the possibility of cracking, spalling or like defects in a rolling mill roll surface the surface is scanned to provide a representation of the hardness and/or the magnetic conductivity. The presence at a location of a rate of change of this characteristic of greater than a predetermined amount foreshadows the possibility of the occurrence of such a ...
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A progressive roll edge misalignment that can be concave or convex. Observed immediately upon unwrapping. Non-uniform cross-deckle caliper: Reduce cross-deckle caliper variation. Winding too soft at same radius of the roll with respect to other radius: Control hardness of wind throughout the problem area.
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In hot rolling mills, premature failure of rolls is a major concern as it adversely affects the mill operation as well as production. Analysis of failed roll materials and actual rolling conditions in service are therefore necessary to understand the roll failure mechanism and thereby improve the wear resistance and extend the service life of rolls.
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(1) Soft roll: the shore hardness is about 30 ~ 40, which is used for roughing mill of billet opener and large section steel mill. (2) Semi-hard roll: the shore hardness is about 40 ~ 60. It is used for roughing mill of large, medium and small section steel mill and steel plate mill. (3) Hard surface roll: the shore hardness is about 60 ~ 85.
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Extensive range This market segment covers forged Work Rolls and Intermediate Rolls for use in Wide Cold Strip Mills of 2-high, 4-high, or 6-high types, including reversing Reduction Mills, Tandem Mills, Double Reduction Mills, and Temper/Skin Pass Mills. Our Rolls can be supplied in a number of grades to suit various applications, materials, and rolling conditions. Both electric …
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The Engineered Bar Products Rolling Mill metallurgical lab has the capability to provide the full spectrum of metallurgical testing including tensile, hardness, charpy impact, grain size, jominy, microcleanliness, macrocleanliness, and aircraft quality testing.
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D2 - The most commonly used material for roll form tooling. • The best value material with high carbon, high chrome for excellent abrasion resistance and toughness. • Used in most areas of the mill except for certain weld rolls. D4 / D5 / D6 - Higher grades of the D series for improved abrasion resistance compared to D2.
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Rockwell Hardness B71 Iron (Fe) 98.81 - 99.26% Carbon (C) 0.18% Manganese (Mn) 0.6 - 0.9% Phosphorus (P) 0.04% max Chemistry Sulfur (S) 0.05% max A36 Mild Steel ASTM A36 steel is the most commonly available of the hot-rolled steels. It is generally available in round rod, square
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