The world No. 1 in crude steel production steel plant, over 70% of the HSS for bar and wire are from us.

Tungsten carbide roller ring

LMM have been supplied to world’s top steel manufacturer Arcelormittal, TATA Steel, NLMK, MMK, etc. We do OEM for Concast and Danieli for a long time

Cemented carbide roll rings (also known as tungsten carbide roll ring) possesses good thermal conduction property. Compared with pther materials, it is much better in terms of heat-resistance, wear-resistance and strength. What’s more, it shardness reduces a little under the condtion of high temperature. So, the cemented carbide roll rings is invented with the ap-pearance of high speed wire rod mill. With the development and improvement

Application: it is widely applied in the production of high speed wire, bar and deformed steel bar.

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Company introduction

LMM GROUP is cemented carbide steel industry, focus on the efficient solution, thus become the specialization of carbide roller ring.

  • Established a strong r&d team,and constantly introduced from abroad advancedproducton technology,
  • Specialization , and the scale of production mode, make we concentrate hard alloy rollring this industry, make our products more fineness and seriation,
  • Established a strong marketing service team,fully meet the requirements of different customers.
    with the three advantages,enable us to continually provide userswith different solution for users to create more value.

Production equipment

The company has an integrated office space including a R&D center and a testing center, and a large-scale modern carbide roller ring production line. It can independently complete the entire process from product design, research and development, production of tungsten carbide powder to cemented carbide roll ring forming, processing, slotting, and rib milling of finished products. It has reached a production scale of 1,000 tons (50,000 pieces of cemented carbide roller rings) per year. The output ranks among the top in the world.
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The production of tungsten carbide powder is first calcined into blue tungsten by APT (ammonium paratungstate) through electric heating rotary furnace.

The production of tungsten carbide powder is first calcined into blue tungsten by APT (ammonium paratungstate) through electric heating rotary furnace.

The blue tungsten is then reduced in an automatic propelled reduction furnace to produce tungsten powder.

The blue tungsten is then reduced in an automatic propelled reduction furnace to produce tungsten powder.

Sieve the tungsten powder through a vibrating sieve.

The sieved tungsten powder is separated by an airflow classifier to separate tungsten powder with different particle sizes.

The sieved tungsten powder is separated by an airflow classifier to separate tungsten powder with different particle sizes.

The tungsten powder is added with carbon black and other additives according to a certain ratio, and then it is ball milled and mixed well for use.

The tungsten powder is added with carbon black and other additives according to a certain ratio, and then it is ball milled and mixed well for use.

Put the tungsten powder prepared with carbon black into the intermediate frequency carbonization furnace for carbonization.

Put the tungsten powder prepared with carbon black into the intermediate frequency carbonization furnace for carbonization.

Finally, the carbonized tungsten carbide powder is milled and screened by a ball mill mixer to produce high-quality tungsten carbide powder.

A photograph of tungsten carbide grains under a high-magnification scanning electron microscope.

Ingredients: Prepare tungsten carbide powder, cobalt powder and other rare elements in proportion

Ingredients: Prepare tungsten carbide powder, cobalt powder and other rare elements in proportion

Add the prepared raw materials into the ball mill for 24 hours of wet grinding, and add a molding agent to fully mix the powder.

Add the prepared raw materials into the ball mill for 24 hours of wet grinding, and add a molding agent to fully mix the powder.

Put the wet-ground mixture into the spray drying tower and spray dry it for use.

Pressure molding: put the prepared powder into the mold, and press it with a hydraulic press;
Pressure molding: put the prepared powder into the mold, and press it with a hydraulic press;

Pressure molding: put the prepared powder into the mold, and press it with a hydraulic press;

The compacted billet is sintered in a low-pressure dewaxing and sintering integrated furnace to form a roller ring blank.
The compacted billet is sintered in a low-pressure dewaxing and sintering integrated furnace to form a roller ring blank.
The compacted billet is sintered in a low-pressure dewaxing and sintering integrated furnace to form a roller ring blank.

The compacted billet is sintered in a low-pressure dewaxing and sintering integrated furnace to form a roller ring blank.

Finishing: Roll ring blanks are processed into finished roll rings through flat grinding, inner hole grinding, and outer cylindrical grinding; it can also be processed into high-line grooved roll rings, high-line threaded roll rings, and combined rolls for bars according to different rolling mills , rebar roll

Finishing: Roll ring blanks are processed into finished roll rings through flat grinding, inner hole grinding, and outer cylindrical grinding; it can also be processed into high-line grooved roll rings, high-line threaded roll rings, and combined rolls for bars according to different rolling mills , rebar roll

Detection:
Detection:

Detection: Our company has a complete set of detection methods, starting from tungsten carbide powder as the raw material of the product, detecting the distribution of tungsten carbide tissue, carbon composition analysis, oxygen content and other chemical composition analysis, and tracking to each process of the product, and finally Roll ring blanks are tested for physical properties. Including the analysis report of the metallographic photo, the hardness and bending strength of the roll ring, etc., and finally the inspection of the appearance of the product, that is, the accuracy of the processing size.

Certification

LMM Service

We can provide special services and differentiated products according to the different working conditions of the rolling mill.

Service Include

Our Clients Give The Best Feedback

A STEEL
A STEEL
Read More
Although the price of LMMGROUP is 1.22 times that of the current rolling stock, through this trial, the data shows that the amount of steel passing through is more than 1.3 times higher than the current rolling stock, and the rolling groove wear of the off-line rolling is better than the current rolling stock.
B steel
B steel
Read More
According to the trial situation, The average amount of steel passing through LMMGROUP rolling is about 50%-60% of the alloy rolling spoke. The processing difficulty of high-speed steel is low, and the processing cost is lower than that of the alloy rolling wheel.
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86(411) 84174804

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