Bimetallic alloys for cylinders

Home / Bimetallic alloys for cylinders

Bimetallic blanks are thus called because they are made of a base material which acts as support. The inner alloy has a thickness of about 2mm, with specific characteristics according to the needs of the material to be processed.

The adhesion of bimetal to the base material results from a combined process of temperature and centrifugation. Alloy casting inside the base material is possible applying the suitable and controlled temperature. Furthermore, the alloy spreads along the blank by centrifugation and sticks to the base material by fusion.

Process (PCC)
Download PDF

Phase 1

We start from a solid bar of structural or forged steel.

Proceso de centrifugación de cilindros - Fase 1

Phase 2

The exterior will be turned and the interior core perforated in order to convert it in a thick-walled tube.
Proceso de centrifugación de cilindros - Fase 2

Phase 3

The chosen alloy will be prepared for “centrifugation”.

Phase 4

The alloy is inserted in the interior of the thick-walled tube, together with some fluxes that protect the oxidation (similar to the welding process).

Phase 5

Both sides of the tube are plugged, leaving a small gas outlet.

Proceso de centrifugación de cilindros - Fase 5

Phase 6

The tube enters in the furnace to the melting temperature of the alloy (always less than the melting temperature of steel of the thick-walled tube).

Proceso de centrifugación de cilindros - Fase 6

Phase 7

Once the alloy has cast inside the tick-walled tube, it is brought to a “centrifuge”, which rotates the tube at high speed.

Proceso de centrifugación de cilindros - Fase 7

Phase 8

Temperature descends while the fused alloy is deposited, by centrifugal force, on the inner walls of the tube.

The tube is cooled by air.

Phase 9

The plugs of both sides are cut.

Proceso de centrifugación de cilindros - Fase 9

Phase 10

The interior of the tube is finished by honing, leaving the interior to the whished diameter.

Proceso de centrifugación de cilindros - Fase 10

Phase 11

The centrifugated tube is finished.

Proceso de centrifugación de cilindros - Fase 11

#mk-tabs-5bef107ea66b5 .mk-tabs-tabs li.ui-tabs-active a, #mk-tabs-5bef107ea66b5 .mk-tabs-panes, #mk-tabs-5bef107ea66b5 .mk-fancy-title span{ background-color: #fff; }

The process to obtain bimetallic blanks requires a high technological level. This, along with the knowledge gained over 30 years, have given us a high-quality standard, which is recognised by the world’s leading machine manufacturers.

Talleres Pena has 2 complete lines to centrifuge tubes with gas Technology.

Qualities
The base materials (support) used for centrifugation are:

P900

Steel developed by Talleres Pena SL used to withstand high pressures. Usually used as base steel for the centrifugation of injection cylinders.

P500

Steel used as support for extrusion cylinders.

P350

Stainless Steel used for base material of centrifugation in special cases that require applications of high corrosión resistance.

#mk-tabs-5bef107eaa05f .mk-tabs-tabs li.ui-tabs-active a, #mk-tabs-5bef107eaa05f .mk-tabs-panes, #mk-tabs-5bef107eaa05f .mk-fancy-title span{ background-color: #fff; }

The Bimetallic alloys used for the internal coatings of the cylinders are:

BIMETAL PENA-40

An iron base alloy with a hardness between 62 HRC and 68 HRC. It has excellent abrasion resistance and good corrosion resistance. These characteristics make it suitable for processing abrasive materials with high loads, glass fibres, calcium carbonate, etc. complemented with materials of moderate corrosion resistance like fire retardants.

BIMETAL PENA-50

A Nickel/Cobalt base alloy. It is appropriate for cylinders that process corrosive products such as fluorinated polymers or products that may contain acids.

BIMETAL PENA-68

A Nickel base alloy with chromium, boron, silicon, etc. It is suitable for processing highly corrosive products.

BIMETAL PENA-69

A Nickel base alloy such as PENA-68, with addition of Tungsten Carbide (between 20% and 40% according to the needs). This provides an additional reinforcement against abrasion.

BIMETAL PENA-80

A Nickel base alloy with 80% of Tungsten Carbide. This make it extremely resistant to wear and corrosion. It is mainly used for processing ultra-polymers with high loads of glass and carbon fibres.

#mk-tabs-5bef107eab661 .mk-tabs-tabs li.ui-tabs-active a, #mk-tabs-5bef107eab661 .mk-tabs-panes, #mk-tabs-5bef107eab661 .mk-fancy-title span{ background-color: #fff; }

ABRASION RESISTANCE

PENA 30
50%
#mk-skill-meter-5bef107ead0d3 .mk-progress-bar { height: 22px; }#mk-skill-meter-5bef107ead0d3 .progress-percent { line-height: 22px; font-size: 13.2px; }
PENA 40
80%
#mk-skill-meter-5bef107ead1c8 .mk-progress-bar { height: 22px; }#mk-skill-meter-5bef107ead1c8 .progress-percent { line-height: 22px; font-size: 13.2px; }
PENA 50
50%
#mk-skill-meter-5bef107ead2da .mk-progress-bar { height: 22px; }#mk-skill-meter-5bef107ead2da .progress-percent { line-height: 22px; font-size: 13.2px; }
PENA 68
50%
#mk-skill-meter-5bef107ead3c8 .mk-progress-bar { height: 22px; }#mk-skill-meter-5bef107ead3c8 .progress-percent { line-height: 22px; font-size: 13.2px; }
PENA 69
65%
#mk-skill-meter-5bef107ead4b6 .mk-progress-bar { height: 22px; }#mk-skill-meter-5bef107ead4b6 .progress-percent { line-height: 22px; font-size: 13.2px; }
PENA 80
100%
#mk-skill-meter-5bef107ead5a2 .mk-progress-bar { height: 22px; }#mk-skill-meter-5bef107ead5a2 .progress-percent { line-height: 22px; font-size: 13.2px; }

CORROSION RESISTANCE

PENA 30
25%
#mk-skill-meter-5bef107eada0e .mk-progress-bar { height: 22px; }#mk-skill-meter-5bef107eada0e .progress-percent { line-height: 22px; font-size: 13.2px; }
PENA 40
60%
#mk-skill-meter-5bef107eadb0f .mk-progress-bar { height: 22px; }#mk-skill-meter-5bef107eadb0f .progress-percent { line-height: 22px; font-size: 13.2px; }
PENA 50
90%
#mk-skill-meter-5bef107eadbff .mk-progress-bar { height: 22px; }#mk-skill-meter-5bef107eadbff .progress-percent { line-height: 22px; font-size: 13.2px; }
PENA 68
90%
#mk-skill-meter-5bef107eadcee .mk-progress-bar { height: 22px; }#mk-skill-meter-5bef107eadcee .progress-percent { line-height: 22px; font-size: 13.2px; }
PENA 69
90%
#mk-skill-meter-5bef107eaddeb .mk-progress-bar { height: 22px; }#mk-skill-meter-5bef107eaddeb .progress-percent { line-height: 22px; font-size: 13.2px; }
PENA 80
100%
#mk-skill-meter-5bef107eadeed .mk-progress-bar { height: 22px; }#mk-skill-meter-5bef107eadeed .progress-percent { line-height: 22px; font-size: 13.2px; }