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Forging-like Rolling

Quality and Productivity

A new tool for modern rolling mill for SBQ grades

THE RLF PROCESS – BD EQUIPMENT

THE INSTALLATIONS:

IBL SELLERO

SANDVIK

DONGBEI

VENETE

CEMTAS

HYUNDAY

2 ROLLING LINE

LARGE BAR MILL (LBM)

SMALL BAR MILL + WIRE ROD

ROLLED PRODUCTS

LBM: 330 – 100 mm (RR, SQ)

SBM: 100 – 22 mm (RD, SQ)

WR: 24 – 5,5 mm (RD)

- Derived from strip mill

design for heavy-duty

applications,

special steels and

superalloys,

high reduction rolling

- Rolls and guides

symmetrical adjustment

for fixed passline to avoid

any friction on the material

- Servo-hyd traversing movement

on low-friction sectors

- Special soft bar-turner, no bar

shifting for scratch-free

rolling operations

- Rolls and guides (on-chocks)

cartridge quick automatic

extraction and change (aside the

line or traversable to

rollshop)

- Automated rolls cooling with

steam suction system

Typical applications:

Rolling mills with medium production

rates (70 - 100 t/h), where few starting

billets are required, as, for example, in

special alloys mill for medium/large

rounds & squares.

SBQ Increase of Billet/Bloom Size

Sliding Evo-Blooming Stand

3D fully coupled thermo-mechanical and microstructural FE models of the forging

has been developed in FE commercial code MARC.

Microstructural evolution of Austenite has been calculated on each integration

point.

Fully Coupled Analysis: single mesh – forging application

3D coupled thermo-mechanical FE models of the roughing and finishing passes of

SZMF and OCAS rolling have been carried out in FE commercial code ABAQUS

and MARC.

Microstructural evolution of Austenite has been calculated with postprocessing

procedure along the paths of interest

Uncoupled Analysis: slab and strip rolling

Availability of experimental trials to reproduce

rolling at different complexity level.

Availability of metallurgical equipment to

analyze the material behaviour.

High expertise in metallurgical model

development and implementation and

integration in FEM models.

Facilities

SUMMARY OF STANDARDS

Ingot size: Ø350 mm

Rolls diameter: Ø1000 mm

Steel grade: 42CrMo4

Rolling Speed (m/s):1.5, 1.8, 1.9, 1.9, 2.3

Pass#1

Strain distribution

Stress distribution

Pass#2

Strain distribution

Stress distribution

Pass#3

Strain distribution

Stress distribution

Pass#4

Strain distribution

Stress distribution

Pass#5

Strain distribution

Stress distribution

SEP1520

CN (5.0 – 5.9)

5.1 – 5.2

CZ (6.0 – 6.9 / 7.0 – 7.9)

6.2 – 6.3

7.2 – 7.3

grade 1

grade 2

BLOOM QUALITY RM AREA REDUCTION

grade 3

The Gm (Nakasaki parameter) evaluation

....BUT SURFACE NEEDS TO BE CONSIDERED ALSO

ROUND BLOOM 800 IN 5 PASSES

Strain penetration

The information (including, e.g., figures and

numbers) provided in this document contains

merely general descriptions or characteristics of

performance based on estimates and assumptions

which have not been verified.

It is no representation, does not constitute and/or

evidence a contract or an offer to enter into a

contract to any extent and is not binding upon the

parties. Any obligation to provide and/or

demonstrate respective characteristics shall only

exist if expressly agreed in the terms of the contract.

These estimates and assumptions have to be

analyzed on a case-to-case basis and might change

as a result of further product development.

Primetals Technologies excludes any liability

whatsoever under or in connection with any

provided information, estimates and assumptions.

The provided information, estimates and

assumptions shall be without prejudice to any

possible future offer and/or contract.

Any use of information provided by Primetals

Technologies to the recipient shall be subject to

applicable confidentiality obligations and for the own

convenience of and of the sole risk of the recipient.

Contact

Riccardo Masini

Area Sales Manager

Primetals Technologies Italy Srl

Via Luigi Pomini 92

21050 Marnate (Va)

T +39 0331 741 468

M +39 335 1312486

E riccardo.masini@primetals.com

primetals.com

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