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  • Vetra Group by relying on a variety of internal and external specialists consulting services in the field of metallurgical engineering from the point of view of material selection, manufacturing engineering, metallurgical processes, reverse engineering, repair, reconstruction and offers quality management.Specialized consulting services include:

    The identification and selection of materials to the original design(basic design)

    • Identification and selection of materials, and any errors in the initial design of critical importance at this stage would be irreparable costs. In this respect, the expert group identification and selection of materials with regard to business services, the cost of purchasing, manufacturing processes, storage conditions and applying the appropriate materials engineering software is recommended.

    Developing technical specifications order and buy materials

    • Develop technical specifications for purchase of materials is essential. The purchase order should be considered a standard part of all points to the same materials purchased and delivered to the designer. Buy Process Engineering is specialized in the field of specialists capable of taking into account the appropriate standards, procurement engineering support.

    Inspection of goods and delivery of materials

    • Inspection has a lot of detailed metallurgical engineering points. In this context, experts of Vetra Group in the manufacturing contract and delivery of materials can be associated with engineering units in the administration of commodity inspection and delivery of materials and services provided in cases where there is inconsistent with standards.

    Review Technical Specifications contracts

    • One of the items in engineering contracts is technical annex of the contract that is mainly devoted to the materials and inspection. in the field there is capacity to compilation technical specifications in accordance with the latest edition engineering standards and the risk of project failure will try to significantly reduced.

    Review technical drawings

    • Technical drawings, mechanical equipment manufacturing, metallurgy and materials engineering are of special note that during construction, inspection, repair and operation should be considered. In many maps, making it possible to ignore a standard part of which is dangerous and makes the project a failure or manufacturing cost and time increases. Vetra Engineering Group with regard to these points as well as much practical experience in order to reduce the risks of this action is to provide services in this area.

    Set stations and control procedures

    • Control stations shall be determined with engineering principles, too much control is not always beneficial, but sometimes reduces production efficiency and increase the cost and production time will be. The group has complete knowledge of the manufacturing processes, inspection methods and metallurgical properties of control stations and control procedures to be determined in a manner appropriate to the type and sensitivity is available.

    Review and compilation of procedures

    • Operating procedures with respect to its merits is worthwhile making process is done correctly, but in the complication of these guidelines should be applied very carefully. Metals and Materials Engineering has its own characteristics and sensitivities. By changing the type of metal, operating procedures change.

    Study of failure modes and mechanisms

    • Vetra Group  relying on the knowledge and practical experience in various fields of engineering, metallurgy, destructive and non-destructive tests and inspections specifically developed to be able to identify the root of the destruction of the mechanical equipment during the service. Vetra expert group, gather information, analyze, suggest corrective action.   

    Analysis of defects is a tool to better explain the roots of what happened, how it happened and why it happened

    Estimating Reliability

  • Hardening of steel components is one of the most commonly practiced heat treatment operations in the steel industry. Quenching is a process whereby a steel component heated to a given elevated temperature is rapidly cooled by immersion in a quench bath containing compositions such as air, water, brines, oils and polymer solutions.

    Water and brines produce very rapid cooling rate and are not suitable for quenching many types of steel. Because they produce excessive strains which warp and crack the steel.

    Hydrocarbon oils produce a relatively slow rate of cooling, which is required to produce desired physical properties such as ductility but prevent developments of desired hardness. In additions to, oils are expensive, have low flash points which create a risk of fire and leave undesirable film on the components which produces smoke and fume during quenching and tempering.

    Low cost aqueous solutions of organic polymers have been developed to cool metals at rates intermediate between water and oil to obtain desirable physical and mechanical properties.

    Vetra Company, as the first provider of polymer quenchants in IRAN,  has produced varied types of water-soluble polymers with the commercial name of “ AQUENCH” by a group of engineers and specialists.

    These  products are so suitable and cost-effective tailored to the needs of heat treatment industries for materials and various alloys and has been able to produce an effective step towards achieving higher-quality for parts and materials as well as better environmental conditions of heat treatment shops and area.

    These products are based on various molecular structures and can be used for different types of steel, cast iron; aluminum and copper.

     The most important ones are:

    Aquench PK150, Aquench PS150, Aquench PS200, Aquench PG150, Aquench PC160

    The main advantages of these polymer quenchants:

    Environmental advantages

    1. Elimination of fire hazard: these products are nonflammable and eliminate the need for protection equipment or extinguishing systems.
    2. Cleaner, safer working environment: no smoke and fumes during quenching and tempering.

    Technical advantages

    1. Flexibility of quenching speed: by varying the concentration, temperature and agitation of polymer solutions; it is possible achieve a range of cooling rates.
    2. Reduction of stresses and distortion: uniform polymer film around the components, reduces thermal gradients and residual stresses, therefore, give substantial reduction in distortion.
    3. Elimination of soft spots: by producing a uniform polymer film around the components, soft spot problems will be eliminate.

    Production advantages

    1. Reduced cost: depending upon the type of polymer and concentration required, Because of lower viscosities and drag-out, the cost of diluted polymer quenchants will considerably be lower than those of quenching oils. On the other hand, fire insurance premiums will be eliminating.
    2. Easier cleaning: residual films of polymer, unlike the oils, will not char but will decompose fully at high temperatures to form Water vapor and oxides of Carbon. For low temperature tempering or aging treatments where the polymer may not decompose completely, the residual film can be removed by simple washing in plain water.
    3. Reduce temperature rise during quenching: polymer quenchant solutions have almost twice the specific heat capacity of quenching oils. Therefore, for a given charge weight, the temperature rise during quenching will be approximately halved.

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  • Repair by welding is an economical way to stop the production line. But welding is a very high risk that they are the most dangerous piece of crack and twist. Vetra expert Group experience in restoration of critical parts for power plants, refineries and industrial molds ensures that the welding method designed, implemented and monitored with sensitive welds with minimal risk and maximum efficiency to be done. Our secret is to use the correct technical knowledge, proper procedures, use the appropriate materials and quality, the use of qualified personnel and equipment.

    Welding services in order to create a layer of coating is resistant to abrasion, corrosion, heat, erosion, etc. with the help of super alloys with properties such as ferrous and non-ferrous base (base cobalt and nickel, tungsten, tungsten carbide, etc.) in order to repair parts as well as create a layer with the desired properties of the components  are other important services. It is worth noting that this group has special expertise in the restoration of welding cracks, fatigue, leaving hydrogen stress corrosion cracking (SCC) with the best facilities.

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