Upravit stránku
en
Log in

Refurbishment of screws

We repair screws in following variants:

  • armoured screws STELIT
  • armoured screws STANDARD
  • armoured screws EXTRA
  • armoured screws EXTREM

Materials EXTRA and EXTREMwere specially designed for welding on extrusion and injection screws.

•    armouring of the upper part of the screw flight by using STELIT weld overlay – suitable for extrusion of clean materials

Diameter in mm           Lenght (max.) in mmWeld thickness in mmHardness
20 ÷ 75060001,5 ÷ 2,540 ÷ 50 HRC

•    armouring of the upper part of the screw flight by using STANDARD weld overlay

Diameter in mm           Lenght (max.) in mmWeld thickness in mm        Hardness
20 ÷ 75060001,5 ÷ 2,5900 ÷ 1000 HV

•    armouring of the upper part of the screw flight by using EXTRA weld overlay

Diameter in mm           Lenght (max.) in mmWeld thickness in mmHardness
20 ÷ 75060001,5 ÷ 2,550 ÷ 55 HRC

•    armouring of the upper part of the screw flight by using EXTREM weld overlay, armoured layer contains tungsten carbide grains  of high hardness up to 2400 HV 
     (30 % - 40 % in a welded on layer)

Diameter in mm           Lenght (max.) in mmWeld thickness in mmHardness
40 ÷ 75060001,5 ÷ 2,550 ÷ 62 HRC

 

               Methods of welding on of the armoured layers when renovating the screws

armouring  of the upper part of the screw flight

armouring of the upper part and compressive edge of the screw flight

armouring the entire surface of the screw