General information

The main products of powder manufacture are operating parts blanks for oil-producing centrifugal pumps. Such parts are traditionally manufactured according to sand casting technology, which doesn’t allow to get the required accuracy of flow-through cavities and the required roughness of untreated surface.

Original powder parts adhesion method was created and patented by the specialists of Novomet; it enabled manufacturing parts of complex shape (for instance, parts with inner cavities) and getting centrifugal pump stages by means of powder metallurgy for the 1st time.

• Powder mix preparation: mixing of base powders, alloying components (nickel, chromium, molybdenum and so on) and lubricant for obtaining the required chemical composition.
• Parts forming by means of automatic presses. Exerting the pressure of 7t/cm3 to powder enables obtaining blanks of accurate dimensions, which correspond with the press geometry.
• Parts adhesion according to patented technology. The pressed blanks are stuck together with the special mixture worked out by Novomet specialists: thus non-sintered blank is obtained.
• Sintering. Thermal treatment of the stuck blanks in nitrogen and hydrogen mixture at temperature 1160 C. all the stages being sintered undergo copper melt impregnation for operating properties improvement.
• Parts control. After sintering 100 percent of blanks undergo joint-efficiency control.

• High accuracy by products manufacturing, i.e. operating parts balancing, that reduce vibration and enlarge pump reliability. This is a great adventure before the similar parts manufactured on the basis of cast stages.
• Hydrodynamic smoothness of part surface that considerably improves pump operating properties.
• Gives the possibility of manufacturing of complex-shaped parts, consisting of wear-resistant and constructive components.
• Sintering. Thermal treatment of the stuck blanks in nitrogen and hydrogen mixture at temperature 1160 C. all the stages being sintered undergo copper melt impregnation for operating properties improvement.
• Parts control. After sintering 100 percent of blanks undergo joint-efficiency control.

For example, stage friction couple is made of materials developed for operation in formation fluid, i.e. possesses high corrosion- and abrasive-wear resistance; housing parts are made of materials with corrosion- and hydro-abrasive wear resistance.

Stages of corrosion-resistant version are designed and put into serial production for operating in most severe environments, connected with corrosion-active mixtures pumping-out. Housing parts of such stages are made of stainless steel with copper melt impregnation.

Novomet company is the largest consumer of stainless steel powder in Russia. The applied material which is manufactured on the basis of stainless steel is developed specially for formation fluid operating and possesses high corrosion-resistant properties in acidic brines and hydrogen sulfide.

Operating parts of corrosion-resistant version are nonsusceptible to hydro abrasive wear in the process of operation and have long life time in wells with severe operating conditions (abrasive, corrosion-active environment, hydrogen sulfide).

Another line of company activity is manufacture of wear-resistant radial and axial bearings for centrifugal pumps. Bearings made on the basis of tungsten carbide possess wear resistance in abrasive environment at the level of solid melt BK 8 and reaction-sintered silicon carbide. Besides, they possess considerably high plastic characteristics and are absolutely insusceptible to shock loads and vibration.

In future the company plans purchasing and assembling of the most contemporary imported pressing and sintering equipment which will increase the output of pump stages.