Customized 35CrMoV Steel Spool Of Aluminum Strip Mill Machine

Customized 35CrMoV Steel Spool Of Aluminum Strip Mill Machine

The 35CrMoV steel sleeve for aluminum strip rolling mill is a high-strength, wear-resistant customized component designed specifically for the high-precision and high surface quality requirements of aluminum rolling.

Application scenarios of 35CrMoV steel sleeve (customized) for aluminum strip rolling mill

1. Core functions

Roll support reinforcement: used for the intermediate roll or support roll of six roll/twelve roll mills to resist the radial bending force during aluminum strip rolling (typical load 300-600MPa)

Dynamic accuracy maintenance: Under the condition of rolling speed 10-25m/s, control the roll gap fluctuation to be ≤ 0.005mm

Thermal management: Conducted rolling friction heat (instantaneous temperature in contact area can reach 200-250 ℃)

2. Special working conditions

Aluminum material characteristic adaptation:

Prevent aluminum chip adhesion (surface hardness ≥ HRC45)

Resistance to chemical corrosion of rolling oil (emulsion environment with pH 8-10)

Mechanical load characteristics:

Endure more than 10 cycles of load (with high fatigue life requirements)

Micro motion wear risk (relative sliding amount with bearing mating surface ＜ 50 μ m)

Material selection and optimization of 35CrMoV steel sleeve (customized) for aluminum strip rolling mill

1. Characteristics of 35CrMoV steel

Composition design (typical values):

C 0.32-0.38%, Cr 1.0-1.3%, Mo 0.4-0.6%, V 0.1-0.2%

Add V to form MC type carbides and refine grain size (ASTM grades 10-12)

Performance advantages:

Tensile strength ≥ 1100MPa (quenched and tempered state)

Fracture toughness KIC ≥ 90MPa · m ¹/²

High temperature strength (yield strength retention rate>85% at 300 ℃)

2. Material modification plan

Surface strengthening:

Ion nitriding (white bright layer thickness of 20-30 μ m, surface hardness HV1100-1300)

Laser quenching (hardened strip width 5-8mm, depth 1.2-1.5mm)

Corrosion resistant treatment:

QPQ salt bath composite treatment (corrosion resistance 2-3 times higher than chrome plating)

Nanocomposite coating (such as TiAlN+MoS ₂, friction coefficient<0.1)

Key heat treatment processes

Quenching and tempering treatment:

Quenching: 890 ℃ × 2h (water air alternating cooling)

Tempering: 580 ℃ × 3h (oil cooled to avoid the second type of tempering brittleness)

Dimensional stability treatment:

Cryogenic treatment (-196 ℃ × 24h, residual austenite<3%)

Time treatment (200 ℃ × 8h, eliminating processing stress)

4. Surface engineering

Composite reinforcement process:

A [Sandblasting treatment Sa3.0 level] -->B [Ion nitriding]

B -->C [Laser texturing]

C -->D [Magnetron Sputtering Coating]

Coating parameters:

CrN/AlCrN multilayer structure (total thickness 8-10 μ m)

Bonding force ≥ 80N (scratch test)

Company Information

Luoyang Guangwei precision technology co.ltd,. locates on the western side of  Jianxi district，Luoyang city.

Steel spools are our main products.

Our 35CrMoV steel spool products are widely recognized and trusted by users and can meet continuously changing economic and social needs.