High speed steel rolls (HSS ROLLS )

High-speed steel rolls generally have a single-groove (time) steel passing capacity that is 3 to 5 times that of high-nickel-chromium rolls. The single groove (times) has a high amount of steel, which saves the time for roll changing, improves the operation rate of the rolling mill, reduces the consumption of rolls, reduces the production cost, and improves the overall benefit of the factory.

Why choose LMM GROUP?

  • The single groove average steel quantity can reach to 3~5 times than the cast iron roll.
    Production Capacity: 15000 tons
  • Our domestic market share: HSS rolls is 60%, rings is 80%.
  • long term export to Germany, India(TATA STEEL), Korea, Turkey(Tosyali Holding, IDC, KROMAN, EKINCILER),  USA and etc.
  • One of the largest enterprises specializing in the production of high-performance high-speed steel series products in China
  • OEM for BRC
  • Long-term supplier for Gerdau

Praise from real customers

Unique advantages of the HSS ROLLS:

● The high-speed steel roll material contains high alloy elements such as vanadium, tungsten, chromium, molybdenum, niobium, etc. The types of carbides in the roll structure are mainly MC type and M2C type. Compared with ductile iron rolls and high-nickel-chromium rolls, the single-groove (time) steel passing is higher, which saves roll changing time, improves rolling mill operation rate, reduces roll consumption, reduces production costs, and improves the overall benefit of the factory.
● High-speed steel rolls have good thermal stability, and the roll surface has high hardness and good wear resistance at rolling temperature.
● The high-speed steel roll has 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 inside.
● During the use of the high-speed steel roll, under good cooling conditions, a thin and dense oxide film is formed on the surface of the roll body. This uniform, thin and dense oxide film can exist for a long time without falling off, making the high-speed steel roll wear-resistant. Sex is significantly improved.
● The high-speed steel roll material has a large expansion coefficient and good thermal conductivity. While the roll wears a small amount of the groove during the rolling process, the hole shape continues to become smaller due to the expansion of the high-speed steel material itself. Therefore, the high-speed steel roll is rolling. During the rolling process, the change of the rolling groove is small, and the consistency of the pass size is maintained for a long time, especially when rolling bars or rebars, it is more conducive to control the negative tolerance of the rolling material.
● Since the core of the centrifugal casting high-speed steel roll is made of alloy ductile iron material, the strength of the roll neck is high.

Application of high speed steel roll:

High-speed steel has only been used as a roll material for more than ten years. The reason why high-speed steel rolls are suitable for both plate and strip mills, wire and bar mills, and has achieved remarkable results is that high-speed steel has high The high wear resistance and hardenability, especially the red hardness at high temperature, make high-speed steel more suitable for use as a manufacturing material for rolls. At present, high-speed steel roll series products are widely used in:
● High-speed bar pre-finishing stand, finished product stand, finished product pre-rolling stand, pre-slicing stand, slitting stand of bar rolling mill
● High-speed wire rod mill pre-finishing mill
● Hot rolling narrow and medium wide steel rolling mill finishing line
● Finishing stand of spring flat steel mill and small section steel mills such as angle steel and channel steel

Main chemical composition:

[wptb id=10023]

Compared with traditional ductile iron rolls and high-nickel-chromium rolls, high-speed steel rolls have higher steel passing per groove (times) due to their good wear resistance, which saves roll changing time, improves rolling mill operation rate, reduces roll consumption, and reduces production. cost, and improve the overall efficiency of the factory. Generally, the amount of steel passing in a single groove (times) is 3 to 5 times that of cast iron rolls, and the total amount of passing steel can be guaranteed to be more than 4 times on average. The following table shows the use effect of high-speed steel rolls on continuous bar rolling mills:

Service Case

Mexico on-site inspection and solution workshop

We manufacture various high-quality rolling rolls according to the clients’ needs , and to ensure the stability and accountability of the quality.

Production workshop

  • What is the process flow of LMM high speed steel roll manufacturing?

Product design→ Roll blank design→ Roll blank manufacturing→ Roll blank acceptance→ Annealing→ Rough turning→ Ultrasonic flaw detection→ High temperature quenching→ Low temperature tempering→ Ultrasonic flaw detection→ Finishing→ Ultrasonic flaw detection→ Roll body grinding→ Roll numbering→ Inspection→ Cleaning → Packing → Shipping → Warehousing → Inspection → Use and Maintenance → On-site Communication → Design Improvement.

As can be seen from the flow chart, roll manufacturing forms a closed-loop system from product design, production and manufacturing, use and maintenance, and improved design, and the quality of rolls is constantly improving.

  • What are the inspection rules for LMM high speed steel rolls?
  1. Check the size and surface quality of each part one by one;
  2. Carry out ultrasonic flaw detection three times one by one;
  3. Carry out hardness test piece by piece;
  4. The depth of the hardened layer of the roll body is affected by the manufacturing process.
  • What are the manufacturing and testing standards for LMM high-speed steel rolls?

First of all, the production and manufacturing must be organized according to the product drawings and technical requirements agreed by both the supplier and the buyer. The main standards are:

GB/T 13313-2008 Roller Shore, Leeb Hardness Test Method

GB/T 1503-2008 Cast steel rolls

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