Scurt istoric Sudotim AS

S.C.SUDOTIM AS S.R.L. offers the following research and development areas: 

1. Metallic materials (ferrous, non-ferrous and amorphous), ceramics and composites engineering;

2. Technological development and result implementation in the manufacturing process of welded, loaded and related materials, for welded and heavy wear required structures;

3. Tero-technique and terotechnology used at intense wear required surfaces through abrasion and its combinations with other basic types of wear;

4. Material characterization, from a physical-chemical point of view, and their compatibility with diverse processing procedures;

5. Ecologic and sustainable development of materials and their manufacturing technologies;

6. Designing, testing and upgrading the equipment in the production area of welded, related, loaded, ceramic and bimetal structures;

7. Developing skills and knowledge regarding human resources;


Research results 2007

1. INOVATION PROGRAM THIXINJECT, Contract nr: 72/25.09.2007 - INOVATION

DESTINATION: ACCOMPLISHING THROUGH THIXOTROPIZATION AND DIRECT MOLD INJECTION OF COMPLEX PARTS, DESTINED FOR ELECTRONIC AND COMMUNICATION EQUIPMENT

The manufacturing technology of thixotropic parts, obtained by mold injection of the materials in semifluid state, is frequently applied at an international level due to high economical and technical performance. The method is suitable for alloys with relatively low melting temperatures and an extended range of the solid-liquid coexistence interval.


THIXOTROPIZATION EQUIPMENT

  • a) high mechanical resistance (flow limit with 30 % over the conventional values of the processed alloy; hardness with 20 % over the usual values; relative elongation 20 %; tensile strength with 30 % over the usual values);
  • b) low weight =20% from the classical version);
  • c) thin walls, = 0,35 mm;
  • d) appropriate form and dimensions to the final ones, accomplished in the developing stage;
  • e) the manufacturing cost is reduced with over 20 %, as a result of the energy reduction with at least 10% and the savings made by improving the utilization coefficient of the material to 98%.


Research results 2007

11. Fundamental and applied research regarding bronze manufacturing CuNiAl destined to recondition naval propellers – ELNAV - CEEX 322 / 2006

1.1 COATED RODS - SIMBOL - CuNiAl STAS 1125/6 EH31.Cu79.Al9.Ni5.Fe5.200.S.4.0 ANS/AWS A5.13: EcuAl-8 
PRODUCER: SC SUDOTIM AS SRL TIMISOARA

USAGE: The electrodes are recommended for massive cast parts, for examples naval propellers.
CARACTERIZATION: Drawn rod electrodes, made from Bz8Al alloy and base-cryolitic coat, destined for welding and cold loading of aluminum - nickel bronzes (CuNiAl alloys).

TECHNICAL SPECS:

RmN/mm2 min. A5% min.
550 6

The chemical composition of the deposited by welding metal:

Cu% Al% Ni% Fe% Mn% alte%
rest 8,5-10,7 4,0-6,5 4,0-6,0 0,7-1,5 max.0,5

The casted rod corresponds with the alloy CuAl9Fe5Ni5 STAS 198

  • The hardness of deposited metal: min.170 HB 10/3000/30
  • Welding behavior: specific to cryolitic electrodes; the melted metal transfer takes place under the form of large and medium drops, resulting in uniform melting; slag covers the welded layer and it is easily removed after cooling.

WELDING INDICATIONS: 
Electrodes weld in a horizontal position without oscillation, using continuous power (negative pole at the electrode).
Before welding the rods get calcination at 300°C for 2 hours, to avoid porosity in the deposited metal

For large parts (naval propellers) preheating is recommended, up to 100°C, the part temperature during welding does not exceed 200°C, after deposition every layer of weld cools until it reaches 100°C, covered with the slag formed at welding. Slag removal is done before depositing a new layer. 
To avoid deformation, after loading , a slow cooling of the parts will be done.

Rod diameter mm 8,0
Welding power A 200-250


DELIVERY:

Rod diameter mm Length mm Mass kg/cutie
8,0 350 5

ATTENTION:  The gases produces during welding are toxic, work will be done only in corresponding ventilation terms.


Research results 2006

1. RELANSIN CONTRACT No. 2023/2004

1.1 COVERED RODS FOR BRAZING VI Ag20; VI Ag30; VI Ag45.

DESTINATION: Accomplishing through brazing of permanent joining of dissimilar materials
USAGE INDICATIONS: It is used in hard soldering processes, with oxyacetylene flame, that is neutral. The burner’s power is chosen function to the rods diameter, great powers at big diameters.

TECHNIC CHARACTERISTICS:

Name Chemical composition on the rod, %
Ag Cu Zn
Flux type EN1045 Melting interval C° Specific weight of the deposition g / cm
ViAg20
20 44 36
FH10 690-810 8,7
ViAg30
30 38 32
FH10 650-750 8,8
ViAg45
45 30 25
FH10 660-740 9,2

DELIVERY: Covered rods for brazing, can be delivered in diameters of 2; 2,5; 3 mm and length of 500 mm. 
WARRANTY: 1 year from the delivery date.
VALIDITY TERM: 3 years from the fabrication date.
MANUFACTURER: SC SUDOTIM AS SRL TIMISOARA
AUTHORIZED DISTRIBUTOR: SC SUPER STIK SRL TIMISOARA.

1.2 ECOLOGICAL BRAZING TECHNOLOGY


  • PNII-PNCDI 2 NANOCERAD PARTNERSHIP

    71-118/2007

    Addition nanomaterial’s micro-alloyed for joining ceramic materials.

  • PNII-PNCDI 2 MICROCER PARTNERSHIP

    2179/2007

    Innovative technologies of obtaining by thermic spaying of composite micro-layers, type cermet, anti-wear and anti-corrosion.

  • PNII-PNCDI 2 ELMOD PARTNERSHIP

    71-039/2007

    Innovative technologies to accomplish modular elements designed for manufacturing plastic deformation tools.

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