Inspected By Dynamice Balancing Test On Centrifugal Casting Steel Spool Of Cold Mill Machine

Inspected By Dynamice Balancing Test On Centrifugal Casting Steel Spool Of Cold Mill Machine

Application scenario of centrifugal cast steel sleeve for cold rolling mill tested by dynamic balance test

1. Core functions

Roll support: As a supporting liner for work rolls/intermediate rolls, it can withstand radial loads (500-1500MPa contact stress)

Dynamic balance: Maintain vibration velocity ≤ 1.8mm/s at rolling speed ≥ 25m/s (ISO 10816-3 standard)

Wear protection: prevent direct friction between the rolling mill and the bearing seat (reduce micro motion wear by more than 60%)

2. Typical working conditions

Mechanical load:

Cyclic bending stress (stress amplitude Δσ ≥ 300MPa, number of cycles>10 ⁷)

Instantaneous impact (impact acceleration>10g when changing rollers)

Environmental conditions:

Rolling oil penetration (viscosity ISO VG 68)

Wear of metal grinding particles (hardness HV600-800)

Material selection and optimization of centrifugal cast steel sleeve for CrMoV cold rolling mill

1. CrMoV alloy design

Range of Element Content (wt%) Functional Function

Cr 1.2-1.8 improves hardenability and corrosion resistance

Mo 0.3-0.6 suppresses temper brittleness and high temperature strength

V 0.1-0.3 refined grain size (MC type carbide)

2. Material properties

Tensile strength: ≥ 1100MPa (quenched and tempered state)

Fracture toughness: KIC≥90MPa·√m

Thermal fatigue performance: Crack length ≤ 0.3mm after 500 thermal cycles (200-400 ℃)

3. Strengthen the plan

Optimization of centrifugal casting structure:

External surface cooling layer (dendrite spacing ≤ 30 μ m)

The proportion of equiaxed crystals in the transition zone is ≥ 40%

Composite surface treatment:

Inner hole: hard chrome plating (50 μ m)+micro polishing (Ra ≤ 0.05 μ m)

Outer circle: Supersonic flame spraying (HVOF) WC-10Co4Cr (porosity<0.5%)

Dynamic balance correction

Unbalance detection:

Using phase analysis dynamic balancing machine (accuracy 0.01g · mm/kg)

Correction method:

Laser precise weight removal (depth control ± 0.05mm)

High speed verification (1.5 times working speed, G0.4 level)

4. Heat treatment system

Quenching and tempering treatment:

Quenching: 890 ℃ × 2h (polymer quenching liquid cooling)

Tempering: 560 ℃ × 4h (two rounds of tempering)

Stabilization treatment:

Cold treatment (-80 ℃ × 8h)

Timeframe (180 ℃ × 12h)

The Steel Spool material is CrMoV, and the specification is 465*405*1000.

Since the very beginning of production, the company formed the principle of top-ranking products, quality and service. We serve our customers with strict quality inspection and technology control. The products are popular among domestic aluminium processing plants and some abroad companies in Europe and India.