Alloy chilled cast iron rolls

Application:

Section mill,bar mill、intermediate and finishing stands of wire–rod mill,narrow strip mill finishing stand, Plate, flat rack, strip finishing

Product name: Alloy chilled cast iron rolls
Packing Details : Wooden box with fumigation or Wooden Fram
Delivery Details: 30~60days or Based on the quantity
Shipping: Sea freight、Land freight、Air freight
Customization:
Customized logo(Min. Order 1 piece)
Customized packaging(Min. Order 1 piece)
Graphic customization(Min. Order 1 piece)
Checking report: Material Report、Hardness Report、UT/MT Report、Dimensions checking report、Mechanical Property Test Report

Manufacture drawing
Process schedule with ETD date
QC checking of each process
Checking report
Photos &videos of each process
ISO 9001 certificate
Warranty Time
The third party Checking

Product parameters

Chemical composition : Si, C, Mn, Ni, Cr, Mo
Barrel hardness:
60-85
Neck hardness: 32-45
Tensile strength: >150 ->350
MicrostructurePearlite+cementite, sorbite+ cementite
Application:

Section mill、bar mill、wire-rod mill narrow strip mill、finishing stand

Barrel diameter ≤500mm
Barrel length ≤1000mm

Production Equipment

The company possesses eight melting facilities:
1.including an Electric Arc Furnace for steel melting of30 tons,
2.45/70 tons LF-VD Furnaces,
3.Electric SlagRemelting Furnaces (10 tons and 15 tons),
4.medium frequency Induction Melting Furnaces (5tons, 10 tons and 20 tons).
These melting facilities intotal can accomplish a daily smelting capacity of 120tons of molten steel, 240 tons of molten iron and 25tons of electric slag remelting. All the meltingfurnaces are automatically controlled by PLC withvery good working conditions; they are equiped withautomatic alarm system and furnished with perfectequipment for eliminating smoke & dust. All the rawmaterials for smelting are strictly controlled, thechemical composition are precisely tested to ensurethe qualified melting process.Thereby, the refiningprocess shows also excellent results.

1. The company has two sets of horizontal centrifugal casting machines, with the maximumspin cast roll size of Dia 1400× 3860mm Barrel Length.


2. The centrifugal casting machinescan realize the integration of spray coating and controlling the mould temperature.


3. They aredriven by hydraulic motor and operated steadily, the speed of rotation could reach 1500 r/min,which can assure the technical requirement ongravity multiple accurately and confirm the best quality of working layer.

There is one set of 45MN Oil Hydraulic Press which can ensure the adequate ratio of forging reduction and deformation for forged rolls.

  1. There are sixteen sets of car-type electric resistance furnaces and gas furnace so perating with high, medium and lowtemperature.
  2. Two sets of differential heat treatment furnaces.
  3. One set of dual-frequency induction quenching machine.
  4. Two sets of spray quenching machines.
  5. One set of high-frequency hardening machine.
  6. Two sets of deep freezing treatmentt roughs.
    All the furnaces are computer-controlled, with the furnace temperature deviation less than 10℃, which ensures very good uniformity of roll hardness.

There are 36sets of machining equiment, including CNC lathes, CNC grinders, and CNC double-sidedmilling machines. The machining range can be dia 80×1000-dia.1600×8000mm and recision ranges up to0.003mm.

Checkout Equipment

The company has the most advanced inspection and testing equipments such as X-ray Fluorescence Spectrometer, Plasma Emission Spectrometer,Optical Emission Spectrometer (OBLF), Hydrogen /Oxygen /Nitrogen Combined Analyzer (LECO), Carbon /Sulfur Analyzer for chemical analysis; and also has Scanning Electron Microscope, Metaloscope, Image Analyzer (Zciss), Microhardness Tester, Universal Testing Machine, Impact Testing Machine, Analog and Digital Ultrasonic Testing Device, Magnetic Powder UT Tester, Stress Meter. PortableLeeb & Shore Hardness Tester, etc. All these instruments and equipments can guarantee the Quality Assurance effectively.

  • Well equipped chemical and physical labs
  • Standard test and inspection procedures
  • Records and samples are kept till roll scraped
  • Final inspection done by QC Dept of third party
  • Advanced and mature process as shown previously
  • Technical confirmation during Heat Treatment process
  • Most of equipments are computer-controlled
  • Standard operation guided by specified process cards
  • Traceable operation records

Production Process


Charge Mixture → lntermediate Frequency Furnace Melting → Horizoncal Centrifugal Casting → Preparatory Heat Treatment → Rough Machining → D.H.Treatment → Finish Machining → Packing → Delivery

lnside Structure & Character

Material

Roll Hardness

Uniformity

Neck Hardness

Tensile Strength

(HSS)

78-88HS

≤4

35-45HS

≥450MPA

(HCS)

70-80HS

≤4

(HCIS)

70-90HS

≤4

(HNCS)

70-85HS

≤5

lnside Structure & Character

Application

Material

Hardening Layer (mm)

Roll Hardness(HSD)

Uniformity HSD

Neck Hardness HSD

Working Roll
Intermediate Roll

Cr2

13( > 90HSD)

70~90

≤3

35-70

Cr3

32(>90HSD)

70~103

≤3

35-70

Cr5

50( > 90HSD)

70~103

≤3

35-70

Back Up Roll

Cr3-Cr5

100

60~90

≤3

30-50

Charge Mixture → Electric Arc Furnace Melting → Ladle Refining → Static Casting → Preparatory Heat Treatment → Rough Machining → D.H.Treatment → Finish Machining → Packing → Delivery

lnside Structure & Character

Material

Roll Hardness

Neck Hardness

Tensile Strength

Alloy Semisteel

40-65HS

≤50HS

≥490MPA

Alloy Cast Steel

35-70 HS

≤45HS

≥600MPA

Graphitic Steel

35-70 HS

≤45HS

≥600MPA

Relaed product

casting iron rolls

casting steel rolls

forging steel rolls

hss rolls

We can provide characteristic service and differentiated products according to the different conditions of rolling mill.

Service Include

Our Clients Give The Best Feedback

@Steel A
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.
@Steel B
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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Need For Some Help ?

Professional engineers provide solutions and technical drawings

phone

86(411) 84174804

mail

lmme-business@lmmgroup.com.cn

Special product design, please send specific data and drawings to our mailbox or form.

Why Choose LMM GROUP

We have an excellent technical service team

The production process and before leaving the factory, all performance indicators are strictly tested, and the professional QC team controls according to the process.

The product is sold, the quality is tracked throughout the process, and the installation and use are guided throughout the process.

Our products have been running on more than 200 production lines and have rich experience

We can provide characteristic service and differentiated products according to the different conditions of rolling mill.

Stick to the agreement, do not do anything that violates the agreement, stick to the spirit of the contract to the end.

Service Guarantee

Pre-sales:

recommend suitable products according to the actual working conditions and needs of customers.It can also bedeveloped and designed according to needs, and customized services can be provided. During the epidemic, provide remote detection technical support

Strict quality control:

From raw materials, to the production process and befor eleaving the factory, all performance indicators arestrictly tested, and the professional QC team controls according to the process.

After-sales service:

Quality assurance and Resolution of any issues that arise

Customer-centred, stick to the contract

Enthusiastic service, with a quick

Resolution of any issues that arise

Short lead time with high quality

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