0086-21-58386256
A roll barrel breakdown accident took place on CSP mill. After investigating of the accident scene and the roll service condition, analysing the barrel fracture and sampling tests, proved that main cause for the roll breakdown was unusual and there appeared a strip-like crack on the boundary layer resulting from the initial flaws extending along the roll circle …
The HSS rolls have good thermal stability, and the roll surface has high hardness and good wear resistance at rolling temperature. The HSS rolls have good hardenability, and the hardness hardly decreases from the surface of the roll body to the inside of the working layer, thus ensuring that the roll has the same good wear resistance from the outside to …
The utilization of high chromium white cast iron offers several advantages in industrial applications: Superior wear resistance: High Cr white iron exhibits exceptional resistance to abrasive wear, making it suitable for environments with high wear and impact forces. Extended service life: Components made from high Cr white iron have a longer …
Ni-Hard iron castings have shown outstanding in a variety of severe applications including work rolls for hot steel milling. High chromium cast irons and high-speed steel type alloy are also widely used in steel plant, …
Founded in 2007, LMM GROUP mainly produces all kinds of metallurgical rolls for various types of steel, bar, high-speed wire and strip hot and cold plate and strip rolling mills. cast iron rolls
Shells of spun cast HiCr iron work rolls generally contain very high level of chromium (typically about 16–18%) as a high fraction of chromium carbides is desired to achieve a good wear resistance. In contrast, the level of carbides should be kept low in the roll core in order to attain the required core toughness and tensile strength.
At present, high-speed steel rolls have been widely used in hot-rolled strip mills to replace high-chromium cast iron rolls, which greatly prolongs the service life of rolls. There are many differences …
High speed steel rolls (HSS) have replaced the traditional high chromium iron rolls (HCI) in many hot strip mills, showing very good results for quality and productivity improvements.
High-chromium white cast iron is a common material for the manufacture of the work rolls used in the finishing stands in hot strip mills. The high temperature oxidation behaviour of as-cast and heat-treated high-chromium white cast iron was studied by gravimetric means at 650 °C in atmospheres that included dry air and a mixture of dry …
Work rolls of hot strip mill: The large- -size high chromium cast iron roll sleeve adopts static casting, and it depends on internal and external cooling to ensure the difference of internal and external performance. This kind of material has better hardness drop, and it guarantees excellent abrasion resistance and anti-spot performance and good red …
High ChromeSteel Rolls. HiCr Steel is characterized by excellent fire crack resistance and very good oxidation behaviour at rolling temperature. Very good wear resistance and constant material properties throughout the …
The variations of microstructure and mechanical properties of a high-chromium cast iron for rolls were studied from as-cast to the final heat treatments. Results show that the as-cast ...
The measured maximum roughness Ra of HSS roll is 1.5 μm and Ra of high chromium iron roll is 1.34 xn--m-lmb.The roughness of HSS roller after 5 times of rolling down is close to that of high ...
High-Chromium steel rolls; Semi – steel rolls; Graphite steel rolls; ... The trial data shows that the ∮370mm high-speed steel roll produced by LMMGROUP has far exceeded the single-groove assessment value of 1,500 tons in the "Roll Ordering Technical Agreement", and the effect is good. ... Cast iron rolls; Cast steel rolls;
High chromium cast irons (HCCI) have been a material of choice for wear-resistant components in the mining and mineral processing industries for a long time, given their outstanding wear and erosion resistance (Ref 1).The main reason for such resistance can be found in the hard M n C m reinforcement carbides embedded within the metallic …
When the material of the cast iron roll contains high chromium, nickel, and molybdenum alloy elements, it is a high-nickel-chromium infinite chilled cast iron roll, which is produced by full flushing (overflow method) Or centrifugal composite casting Process high nickel chromium infinitely chilled cast iron roll has more carbides in the matrix structure …
For this investigation the most common work roll materials were studied namely, a high speed steel and a high chromium white cast iron. These alloys were especially manufactured for earlier work roll projects [8, 9] and their chemical compositions are presented in Table 1.The oxidation behaviour of these materials was studied using …
Now they have basically completely replaced high-chromium cast iron rolls. . The selection of rolls for the same rolling mill is not uniform, and the most suitable …
On the other hand, HSs rolls hardness is always high even when the tempertemperature is high. Due to this excellent feature Hss rolls has very high failure resistance. Bars made to Size: HSS rolls have high swelling factor and good thermal conductivity.Because of thisthe groove/pass sizes are more stable while rolling rebars and has better ...
High-chromium steel roll. Brand name: LMM GROUP. Packing Details : Wooden box with fumigation or Wooden Fram. Delivery Details: 30~60days or Based on the quantity. …
The trial data shows that the ∮370mm high-speed steel roll produced by LMMGROUP has far exceeded the single-groove assessment value of 1,500 tons in the "Roll Ordering Technical Agreement", and the effect is good.
The paper is aimed to give an overview on the white cast iron alloys, and particularly high chromium white cast iron alloys, including their classifications, their standard specifications in USA ...
DOI: 10.1016/J.WEAR.2009.01.049 Corpus ID: 136935980; Hot friction and wear behaviour of high speed steel and high chromium iron for rolls @article{Pellizzari2009HotFA, title={Hot friction and wear behaviour of high speed steel and high chromium iron for rolls}, author={Massimo Pellizzari and D. Cescato and M. G. De Flora}, journal={Wear}, …
1. Introduction. High-chromium white irons are usually hypoeutectic ones, and they are often applied in wear environments, such as mineral processing, cement production and steel manufacturing industries, and so on [1], [2], [3], [4].The considerable M 7 C 3 chromium carbides in high-chromium white irons provide excellent wear …
Our rolls have the characteristics of high precision, high wear resistance and high fatigue resistance, which can significantly improve the output and product quality of steel rolling mills. Cooperation with us will provide you with stable, reliable and efficient roll solutions to help you achieve your business goals.
In this paper, a combined FE simulation and scratch experiments approach was used to simulate the contact established between a high-speed steel (HSS) work roll and a hot strip material in hot rolling, in which the top layer and the substrate represented the HSS roll and the tip of the indenter represented a particle from oxide scale formed on the …
Brand SDMT; Product origin HEBEI; Delivery time within 75 days after advanced payment; ... High chromium cast iron roll. Thanks to its high content of M7C3, type carbide in range of 20-30% and discontinuous network distribution of carbide, the roll offers a high wear resistance performance. The matrix is finely-disseminated secondary carbides ...