<strong>Birth and development of centrifugal composite rolling mill rolls</strong>
When human beings created the rolling mill, there were rolls. The early rolls were integrally cast with sand molds, and metal mold casting was invented later. Roll manufacturing technology took a leap forward when rolls were poured with tangential gates from the bottom of the mold. With the development of the steel rolling industry, steel […]
Introduction to mill roll knowledge
Cast iron roll The carbon content of cast iron roll is about 2.5%~3.5%. According to the main material, it can be divided into four categories: ordinary cast iron roll, high Ni-Cr infinite cold-hardened composite cast iron roll, high chromium composite cast iron roll and alloy nodular cast iron roll. Common structures in cast iron rolls […]
Cold mill roll life and flaw detection standards
The main links in the manufacturing process of cold rolls are smelting, forging, heat treatment, processing and inspection. Cold rolls have to bear a lot of rolling stress during the working process, and problems such as welding seams, inclusions and edge cracks in the rolled piece are easy to lead to instantaneous high temperature, which […]
Causes of mill rolls breakage
1: Brittle fractureThe fracture shape of this type of roll is relatively flat, and the surface of the roll body around the fracture is relatively neat; 2: Ductile fractureThe fracture shape of such rolls is mostly “mushroom head”, and the roll body near the fracture is crushed. Comparing the two, it is found that the […]
Repair method of polymer composite material for mill roller bearing wear
It has super adhesion, excellent compressive strength, wear resistance and corrosion resistance and other comprehensive properties.The use of polymer composite materials can be repaired without disassembly on site when the wear size of the transmission part is relatively small. It not only avoids mechanical processing, but also has no thermal stress and thermal influence of […]
Advantages and disadvantages of low temperature heating and rolling of bar and wire
Low temperature rolling generally refers to low temperature heating rolling. It is to heat the billet to a temperature lower than the conventional heating temperature and rolling at a temperature lower than the conventional hot rolling temperature. damage. Saving energy and reducing consumption is always an important task of the iron and steel industry. In […]
Different Types of Rolling Roll Mills used by Steel Roll Manufacturers
The rolling process is the most common industrial process, which is used for making large length cross section like sheets and plates of steel and aluminum for structures. Rolling mills are used for completing the rolling process. These are available with various steel roll manufacturers in a variety of shapes and sizes as per requirement of the […]
Metallurgy of Rolling mill Rolls
Rolls are implements or tools used in rolling mills to reduce the cross section of the material being rolled. They are highly stressed tools and are subject to wear. They are needed both for the rolling of sectional as well as flat products. In recent past, rolling technology has improved and changed dramatically, but the […]
High Line Operation Points – Heating zone
Thermal system: 1.1.1 Rolling temperature: 990±20℃, the furnace temperature of each section is controlled in a balanced and stable manner, and the heating time is 90 minutes. 1.1.2 Furnace temperature control Cold billet furnace temperature control（℃） Hot billet furnace temperature control（℃） soaking section (II) heating (I) heating soaking section (II) heating (I) heating 1090 1090 […]
High Line Operation Points- rolling mill area
Material shape control 1）Material shape process parameters: Rolling Mill roughing mills intermediate rolling pre-finishing mill finishing mill Material type of the last flight of the unit（mm） 77.0±0.5 35.5±0.3 Φ6.5 Φ8 Φ10 Φ12 Φ14 Φ16 Control according to technical conditions of finished products 20.2 19.6 19.6 19.0 22.0 20.2 ±0.2 2）Material shape control principles and precautions: […]