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A Comprehensive Guide to Hot Rolling Mill Process

 

The main objective of the entire steel rolling process is to create complete or semi-complete parts by deforming the massive plates and ingots to decrease the cross section in them. In metalworking processes, hot rolling mill is considered to be a commonly-used technique. In this technique, metal is heated beyond the recrystallization temperature, and the plasticity is distorted during the rolling procedure. This process ensures that the volume and features of the metal are maintained while creating various shapes and dimensions. 

After being heated, the metal goes through rolling devices to retain its volume and uniformity while flattening and reducing the overall cross-sectional area.  The construction sector often employs the hot rolling process and the product it creates. The hot-rolled steel from this process is great as raw material and the final product. 

How Does The Hot Rolling Process Work For Steel And Stainless Profiles?

Steel billets and blooms are heated at an extreme temperature to initiate the hot rolling procedure. The temperature surpasses a minimum of 1100 degrees and is changed depending on the requirements of the process. The metal is passed via the rolling mechanism to ensure there is damage on the edges and structure of the metal grain. This process ensures that new and sturdy designs and boundaries are produced with uniform grain structures and volume, 

At a high temperature, the slabs or blooms pass through the casting process and are then fed into the rolling mills. The metal’s strength, toughness, ductility, formability, resistance to vibration and shock, and weldability are all increased by rolling operations.

During the treatment process, extreme force and pressure are used for metal cleaning and eliminating the mill scales.  Doing so ensures that no surface defects on the final finished items. When the metal cools down, the cooling rate of the steel is to be checked to correct the crystallization and, in general, microstructure depending on the various uses.                                                                       

Why Is Hot Rolling Preferred?

Hot rolling is the preferred method amongst steel rolling mills due to the certain characteristic that it instills in the steel. Steel that goes through the hot-rolling process tends to be

  • Stronger 
  • Tougher
  • More Ductile 
  • Resistant to Shock and extreme vibrations
  • Weldable 
  • Formable 

What Are The Advantages Of Hot Rolling 

When the hot-rolling process is selected for steel rolling , numerous advantages are attached to it that benefits the end product being created. Here are some of the various advantages:

Enhanced Mechanical Properties 

When steel goes through a hot rolling mill, several characteristics and properties of the steel are altered due to heat and pressure. Certain mechanical properties encounter the most change but improve the quality of steel. For example, properties such as elasticity, elongation percentage, shock resistance and overall toughness improve drastically. 

Altered Grain Structure

In the hot rolling mill, the metal’s grain structure changes. The grain structure that plays a vital role gets refined. The usual coarse grain gets transformed into finer grains which alters the properties of the metal. 

Change In Porosity

The hot rolling mill and its process ensure that the porosity of the metal is removed and eliminated. This alternation due to hot rolling creates a stronger, tougher, uniform metal in the structure.

Distribution Of Impurities

Metals and steels have numerous impurities that can affect the final result and how the product is formed. In hot rolling mills, impurities,  such as slag, are distributed throughout in an even manner. If they remained concentrated, those areas would have become weaker and would be prone to breakage. 

Requirement Of Low Pressure:

In hot rolling mills, the metal deformation process is easier due to the extremely high temperature of rolling. This temperature reduces the requirement for high pressure, making the process easier. 

Why Rely On The Steefo Group For The Hot Rolling Mills?

So you are looking for suitable hot rolling mills and their equipment. Look no further, as The Steefo Group delivers you with anything your steel rolling mill will ever need. We have been the ultimate and most favoured integrated hot rolling mill manufacturer for almost four decades. The Government of India also recognizes us as the Star Export House, and we adhere to our reputation. With over 100+ locations, we are a renowned name worldwide and in the country. 

Understanding The Steefo Group’s Hot Rolling Mills 

When you choose The Steefo group, you are getting assured quality. You also obtain the most innovative and futuristic products in hot rolling that will enable you to convert and reinvent the face of your business.  The Steefo Group specializes in everything,  from turnkey projects to single modular projects, depending on the needs of your business. From TMT bar rolling and wire rod mills to products such as mill stand, rolling mill gearboxes, and reheating furnaces

We undergo stringent testing and quality checks to provide you with the best. Our priority is technology and innovation, providing you with the most updated products for your rolling mill. 

To learn more about the Steefo Group and their products and how they can improve your productivity and profits, contact +91 8758998607 or drop a mail at marketing@thesteefogroup.com

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Key Factors to Consider While Choosing a Rolling Mill Manufacturer

 

When picking a rolling mill machinery manufacturer, you want to select the best out of all of them. The proper rolling mill machinery manufacturer ensures that your needs are met without errors and still upholds your standard. Here are some factors you need to consider when picking your manufacturer. 

1. Condition of Production Facility 

The condition of the production facility says a lot about the quality of products. You want your rolling mill machinery to be the best in class to create high-quality products. Top-quality rolling mill machinery manufacturers like The Steefo Group pay attention to every detail, from the raw material to the equipment used during the process. When you select good quality manufacturers, you are guaranteed to get premium results up to par with your standards. 

2. Variety Of Products Offered 

An average steel rolling mill manufacturer offers various products for varied industries. Top rolling mill machinery provider, The Steefo Group, has a huge range of products, including reheating furnaces, mill stands, shears, gearboxes, loppers, quenching systems and more. This gives you a better overview of the technology they employ regarding their products. A suitable steel rolling mill manufacturing plant caters to all these requirements by offering superior quality products for different industries.

3. Attention To Quality Control 

When searching for the perfect manufacturer, you must understand their commitment and overall quality control process. Manufacturers like The Steefo Group are consistent in quality and therefore have a 100 percent customer and client satisfaction rate. Your manufacturer should guarantee quality and meet your desired standards through stringent norms. Most high-quality rolling mill machinery manufacturers have a dedicated quality assurance team that examines the products and machines being created. They also should ideally perform quality change throughout all the stages. 

4. Valid Certification 

All rolling mill machinery manufacturers must maintain a certain standard of quality. The bar complies commonly with ISO and viz. One of the most premium rolling mill machinery manufacturers, The Steefo Group, complies with ISO 9001:2015 certification. Therefore, ensure that the manufacturer you will select and work with has the proper and valid certificate to guarantee that your standards are not compromised. 

5. Innovation, Research and Development:

Any manufacturer should always focus on moving ahead, investing in research and innovation and focusing on development. Its dedicated research and development team indicates a great manufacturing company. This indicates that the company is constantly working to fix any errors and improve the current process and create a more streamlined version. Manufacturers such as The Steefo Group utilizes software such as CAD and Kisssoft to enhance ongoing development that meets the industry standards to become not the only provider of both rolling machinery and solutions. Before selecting, find out if there is an R&D team and if so, get in contact with them to see if their vision of the future aligns with the vision you have for your company.

6. Distribution And Delivery 

When you work with a manufacturer, timing is crucial to the entire operation. The delivery of the products and machinery will determine the time required to finish the task efficiently while maintaining customer satisfaction. Distribution and delivery are also important to get ahead of the competition. Check if the rolling mill machinery manufacturer has a well-connected and reliable distribution and delivery model, as it will ensure a seamless and stress-free delivery process. 

Why Should You Pick The Steefo Group To Be Your Rolling Mill Machinery Manufacturer?

When you select The Steefo group, you are getting guaranteed quality. You get access to the most innovative and futuristic products that will allow you to transform your business. The Steefo Group specializes in everything,  from turnkey projects to products, depending on the demands of your business. From TMT bar rolling mills and wire rod mills to products such as mill stand, rolling mill gearboxes, reheating furnaces and more. 

Our projects and products also undergo thorough testing and strict quality checks to supply you with the best machinery and products. Our focus on technology and innovation also provides you with the most up-to-date products for your rolling mill. 

To learn more about the Steefo Group and their products and how they can improve your productivity and profits, contact +91 98240 76873 or drop a mail at marketing@thesteefogroup.com

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Why are Mill Stand A Necessary To Your Rolling Mill?

 

Mill stands are one of the most crucial pieces of equipment in the entire rolling mill process. A mill stand is usually fit with numerous rolls via which the workpiece bar goes through, achieving its necessary cross-section. Several mill stand designs serve different purposes in the rolling process.

Housing-less Mill Stand 

A Housing-less mill stand is specifically designed to create superior quality TMT bars, wire rods, channels, bars, universal beams, angles and more. The housing-less mill stand can do this effortlessly due to its rigidity and roll change abilities. These mill stands are usually also equipped with complete automation, especially during the connection and disconnection of fluid utilities and spindles. This automation assists the mill stand in becoming more efficient and quick in comparison to others. Housing-less mill stands also have a reduced stress path, screw-down automation, axial roll adjustment abilities along with complete automation, self-balancing spindle and reduced backlash. Roll change is easier in the same.

2-HI Conventional Mill Stand 

A 2-HI conventional mill stand has two work rolls that are pressed together with enormous force. The 2-HI mill stand contains non-reversing rolls that rotate in the same direction, which means that the workpiece bar cannot be fed from the other direction. A 2-HI stand either has to be a vertical or a horizontal stand.

3-HI Conventional Mill Stand 

A 3-HI mill stand is essentially needed in hot rolling reversing mills without switching the order of rotation of the rolls. In this type of mill stand, there are three working rolls. The top and bottom roll rotate in the same direction; meanwhile, the centre roll turns in the opposite direction. This is important as the workpiece bar keeps passing back and forth alternately through the rolls without reversing the direction in which the roll turns.

Pre-Stressed Mill Stand

Pre-stressed mill stands are different from conventional mill stands. In this case, the mill is already pre-stressed with the help of hydraulic four nuts. This allows them to be prepared with the highest force needed for rolls operating during the rolling period. The process allows any deflection of the mill stand to be avoided, especially under the rolling load. 

Universal Mill Stand 

A universal mill stand is a rolling stand that rolls in four ways. It is used in the rolling section where the section is shaped from all four sides. There are two vertically and horizontally mounted rolls in a universal mill stand. The vertical rolls are inactive and are positioned amid the bearing chocks of the horizontal rolls in the vertical plane. The vertical rolls are essentially present to manage the width of the bar during the rolling process. 

Convertible Stands

Convertible mill stands allow conversion in the positioning. The stand allows either vertical or horizontal positioning during the intermediate finishing, depending on the production requirements. Convertible mill stands are convenient due to their speed during changing positions. It takes less than two minutes to do so. The stand rigidity is also an added advantage. The quick stand change system also does require any crane support and is equipped with reduced fountain depth. 

Cantilever Stand

A cantilever stand is quite similar to a block mill, has both horizontal and vertical configurations, and can be configured to meet the client’s design requirements. The sleeve bearing on which the rolls are mounted can achieve high speeds and produce wire rods ranging from 5.5mm to 8mm.  The rolls are essentially small discs placed on the cantilever shafts and are available for one or two passes. The material o the roll is often hard and is created out of tungsten carbide.

Vertical Mill Stand 

This up-drive type comprises a roll stand, mill spindles, a vertical gear reducer, a pinion stand, and a motor. To protect them from the roll cooling water and mill scale, the gear reducer and motor are installed on a concrete frame. There is also a lifting device under the roll stand that is installed to manage the position of the caliber to pass the level. The roll stand can be moved to the work side during stand changing.

Horizontal Mill Stand

The horizontal mill stand comprises of a roll stand, mill spindles, a pinion stand, a gear reducer and a motor. In the case of a regular pass line, the roll stand slides on the exterior of the sole plate. In a low-speed rolling mill with less than 10 m/sec, the pinion stand and gear reducer are from a single unit. A cross pin joint is used for the mill spindle and is supported by the spindle carrier during rolling.

Bottom line

In a rolling mill, rolling mill stands are used for several purposes, including generating billets, slabs, blooms, bars, plates and other sheet products. Rolling mill stands were initially used for steel casting, but today they are usually created from cast slabs or rolled plates.  

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How Are The Products of The Steefo Group Changing The Rolling Mill Industry

 

To manage the fast-paced nature of steel rolling mills, you need superior quality products that can support your production line. If you are looking for such premium quality, the only name that one should rely on is The Steefo Group. Our futuristic and innovative modular products can transform and aid all your growing business needs. This will allow you to obtain more clients due to your new and improved business performance. Steefo Industries also provides high-quality products that pass through several quality assurance checkpoints to ensure seamless performance. Our products and manufacturing process goes through constant up-gradation and improvement to guarantee that our clients only receive the best of the best.

Now, let us give you a glimpse at our vast product line.

Reheating Furnaces

Reheating Furnaces are essential for hot rolling mills. They help in converting the Billets into rolling temperatures and making them suitable for deformation and further use. The Steefo Group’s reheating furnaces stand apart from the rest because it ensures several benefits that are necessary for improved performance, such as

  • Consistent Thermal Level and Thermal Homogeneity
  • Mark Elimination
  • Combustion Automation
  • High-Quality Refractory Material Installation

Rolling Mill Gearbox

As the number one rolling mill manufacturers in India, we also create rolling mill gearboxes. A gearbox is a housing that contains numerous open gear sets. The housing comprises shafts and bearings and contains lubricants, and protects the component from other conditions. The job of the gearbox is to increase or decrease the speed and torque of the drive unit depending on the requirement. Our gearboxes are available in several load capacities and have multiple speed ratios. The Steefo Group ensures that our rolling mill gearboxes have the best-

  • Dimensional Accuracy
  • Reliability
  • Optimum Performance

Mill Stands

Mill Stands are an essential part of rolling mills. They can do quick roll change and complete automation to create numerous products, namely, wire rods, universals, channels, beams and more. The Mill Stand produced by the Steefo Group has several purposes, such as the hot rolling of wire rods, TMT bars, strip mill and much more. To work with the demand of our clients, we ensure that our mill stands can be upgraded and customized. Fibre Bearing and Anti Friction Roller bearing upgrades in our conventional stands are some.

Shears

The Steefo Group has the expertise in creating some of the best shears among all rolling mill manufacturers. The Shearing machine is an integral part of the entire hot rolling process. These are installed to cut the tail end and the length. This step is taken to fit the cooling bed and the commercial length of the TMT bars. Our shears have the Steefo guarantee of being of superior build and performance-driven.

Pinch Rollers

A Pinch Roller created by the Steefo Group is essential when working with hot rolling and strip steel mills. Pinch Rollers operate horizontal cantilever structures that require an air cylinder and double roll device, which allows the up and down synchronous roll clamp. A pinch roller aids in removing coil rejection because of poor surface quality. In general, pinch rollers are designed to provide superior performance and can meet the expectation and needs of the hot steel strip coiling application.

Loopers

If searching for the best loopers, you should rely on the ones produced by the best rolling mill manufacturers in India. Our Loopers are required at the finishing mill area for a tension-free rolling process and to ensure accurate section tolerance is achieved. To improve production capacity by reducing miss rolls, installing loopers is critical. Looper also can be installed in the inter-stand position to decrease the tension variation by a simple angle adjustment, improving bar threading and product quality.

Quenching System

The Quenching System supplied by the Steefo Group is trusted by rolling mills in India and worldwide. A quenching system, also known as the TMT box, is installed after the final finishing stands on the mill train to provide the rebars with the thermal treatment necessary to create the product. The Quenching system provided by us also cleanses the surface via scrubbing. These are some of the characteristics our superior quality quenching system offers:

  • Consistent ring formation
  • Uniform tensile strength along the length of the bar
  • Motorized valves
  • Corrosion-free
  • Time-efficient
  • High-quality design
  • Powerful construction
  • Closed frame to adapt the forces in the sizing press
  • It can be operated under extreme conditions

Automatic Cooling Beds

Our Automatic Cooling Beds are necessary to cool down TMT bars by using uniform air cooling and are also used to transport it in a phased manner to the discharged side. These beds also provide alignment when they are transferred onto the roller table to the finishing section.

Packing Beds – Tying & Bundling

The Steefo Group creates superior quality and advanced packing beds for steel rolling manufacturing. Packing beds are necessary for tying and bundling rebars. These packing beds are critical, enhance productivity, and improve plant function.

Roller Table – Conveyor

We manufacture some of the most efficient range of Roller conveyors or roller tables necessary for rolling mills. These roller tables transfer a billet to the charge furnace, then transfer it from the furnace to the roughing mill and cooling bed. It is then used to shift the product to the shearing machine, which is cut depending on the desired length.

Why Choose Products From The Best Rolling Mill Manufacturers

When you select products from The Steefo group, you are getting guaranteed quality. You also get your hands on the most innovative and futuristic products that will help you transform the face of your business.

Our projects and products also undergo rigorous testing and quality checks to supply the best-in-class products. Our priority on technology and innovation also provides you with the most up-to-date products for your rolling mill.

To learn more about the Steefo Group and their products and how they can improve your productivity and profits, contact +91 98240 76873 or drop a mail at marketing@thesteefogroup.com.