About us
Focused on product development technology in key products segment, LMM GROUP established in 1976, is an entirely state-owned enterprise, with more than 1500 staffs, covers an area of 120000m2, including 50000m3 of building area. We manufacture a wide range of rolls that are used in different mills e.g. Hot and Cold Strip Mill Rolls, Plate Mill Rolls, Section Mill Rolls, Narrow Strip Mill Rolls , Sendzimir and Cluster Mill Rolls and Aluminum Mill Rolls.
Our Production capacity:
a. Annual sales, average € 350 million USD
b. Cold strip mill rolls: 20,000 ton
c. Hot strip mill rolls: 45,000ton
d. Other rolls: 15,000 ton
1.Finished Roll weight: 160-85,000kg
2.Finished Roll Barrel Dia(max): 1800mm
3.Finished Roll(Full) Length( max): 4000mm
We have won the trust and praise of numerous customers from over 30 countries, and have established stable cooperation with many large steel mills.Our customers always be touched by our enthusiasm, and we warmly welcome all customers from all over the world to visit our company.
Enterprise Culture
- Enterprise Vision:
Construct resource saving-oriented and environment friendly-oriented enterprise by integrating with the enterprise development and employee development.
- Business Philosophy:
Credit-standing upmost, cooperation and win-win
- Employee Oath:
I shall fulfill duties be united and friendly, go after excellence and get common development and survival and make every effort to realize wonderful tomorrow.
LMM group is a big family, we work together and grow together. For all these years, we have achievements and also memories. We hold various activities every year, such as annual meetings, travel, birthday parties, group weddings, holiday celebrations, outings and learning, etc. Every member is vital and everyone is passionate here.
Production facility and instrument
Casting Equipments >>
LMM GROUP adopts the normal casting way, slot-based casting and large, medium and small horizontal centrifugal casting method to produce rolls, where the large-sized vertical centrifugal machine is capable of producing the rolls of the maximum specifications of $ 1400X4600x9000.
The company mainly with: the United States should 20T / 30T double power inverter intermediate frequency electric stove,10T.5T,3T intermediate frequency electric stove, for a total of eight seat, 60T LF, 60T VD vacuum finer, V.C vacuum casting furnace each one, equipped with advanced spraying and the sand casting equipment.
LMM GROUP implements strictly the ISO9001:2008 and the technology standards, and adopts the computer-aided control technology to ensure the consistency of technology control of production process of rolls, the consistency and stability of product quality and performance.
<<Thermal Treatment Equipments
LMM GROUP is equipped itself with 30 NC resistance-type high and low temperature heat treatment furnaces, as well as the coating and quenching equipments, open-type differential temperature heat treatment furnaces and gas baking oven. All thermal treatment equipments adopt the computer-aided centralized control system to control consistent and proportional temperature of furnaces strictly and ensure the consistency of roll hardness.
Processing Equipments >>
LMM GROUP provides the followings in its processing center, i.e.: over 20 large-sized imported NC grinding machines, large-medium sized NC lathes and large-medium sized NC planer-type double-side milling machines, as well as over 100 dedicated lathes for various rolls of C61250,C61200,C61125,C84180,C84160,C8463, C8440 and C91250and etc..
LMM GROUP is equipped itself with the high-precision dedicated cutting and processing equipments, where the trained processing skills and process control technologies meet various processing precision of various rolls fundamentally and satisfy with the rolling characteristics and technical requirements of various rolling machines.
Final Inspection Process:
Dimensional Report
Chemical Analysis
Physical Properties
Ultrasonic Report
Hardness Report
Photo-micrographs
<<Test And Inspection Equipments
LMM GROUP establishes the perfect quality monitoring and inspection system, covering the full process from raw materials to the finished rolls. With the high-quality technicians and the advanced inspection and test equipments at home LMM GROUP adopts the way to collect information and process feedback through computer for full process.
LMM GROUP is established the raw material analysis centre, quick analysis centre and physical test centre to control the process quality and performance of rolls and satisfy with all quality test and inspection demand of users on products. Furthermore LMM GROUP provides the modern advanced measures for performance and quality control and technical research and development of rolls .
The quick analysis centre is equipped with the Leco CS230 carbon–sulfur analyzer made in USA, LecoTCH-600 hydrogen, oxygen and nitrogen analyzer made in USA, Q8 direct-reading spectrometer made by Bruker Germany and the OBOB GS1000 direct-reading spectrometer made in Germany and etc..
The physical test centre is equipped with the universal material testers, impact test machines, Brinell & Rockwell hardness meter imported from England，MNV-2T metallurgical phase microscope made by SHIMADZU Japan, Leica DM250OM front-view metallurgical phase microscope and DM6000M metallographic image analyzer made in Germany，thermal dilatometer made by SHIMADZU Japan, JSM-6150A scanning electron microscope made in Japan, KK USD12 ultrasonic flaw detector made in Germany and etc.
The raw material analysis centre is equipped with the chemical analysis lab, moldings and tester, molding sand hardness meter, coating tester and etc.