The method of hardening metal products cylindrical

 

(57) Abstract:

The method of hardening metal products cylindrical shape includes processing by throwing high-speed jets of the alloying element, dispersed with the ribbon explosive charge annular shape located around the workpiece at a distance R, which is in the range of 0 < R < 0,414 R1where R1is the radius of the details, and throwing produce once with the side surface of the charge. The technical result of the invention is to reduce processing time and simplify the process. table 1.

The invention relates to the treatment of steel by means of concentrated energy sources, specifically high-speed jets of the alloying element. Can be used in mechanical engineering, in particular to increase the service life of parts, having a cylindrical shape, the rail transport wheels, runners crushing of aggregates, etc.

Known methods of processing have become involved in the bombing of parts of the stream of particles, dispersed by the products of detonation of the explosive charge. Thus there is the effect of super-deep penetration of particles RIRs motion of particles in the samples, collapse and have the form of filamentary tracks, consisting of alloying materials and the matrix.

A prototype of the invention has adopted a method of processing products, which consists in machining steel by means of concentrated energy sources. The method involves quenching from 1100oC aging for 6-10 hours and local processing.

The disadvantages of this method include the duration and complexity of the technological process.

The essence of the invention lies in the fact that the impact of high-speed jets of the alloying element is carried out once with the ribbon explosive charge annular shape located around the workpiece, throwing jets of powder produced from the side surfaces of the charge and the principal amount of the alloying element is located in the area, experiencing maximum mechanical damage during operation, and the distance from the workpiece to charge BB should be in the range from 0 to 0,414 R1and the radius of the ring of charge from BB R1to 1,414 R1as at the output of these boundaries do not observe the penetration of the alloying element in the material of the workpiece. In-depth consideration of high-speed particles to cilindrica the2is the radius of the ring of the explosive charge.

The maximum depth H = 0,293 R1.

Geometry of BB is achieved by increasing the concentration of the alloying element near the treated surface, and particle tracks cross each other. This is achieved by processing the entire surface of the cylindrical workpiece, which leads to a uniform hardening of the near-surface volume. There is a reduction of time spent on processing, a significant simplification of the circuit process, and therefore cheaper.

Example: Billet of steel CHMP diameter of 220 mm and a thickness of 60 mm was procialis on the cylindrical surface of the high-speed jets of titanium carbide dispersed by the detonation products of a side surface of the charge. After treatment were observed chipping and chipping of the surface layer of the samples. From the surface layer of the processed workpiece cut out the samples that were tested for wear resistance. The results are shown in the table.

The method of hardening metal products of cylindrical form, including the effects of concentrated energy sources, different tech with the ribbon explosive charge ring-shaped located around the workpiece at a distance, R, which is in the range of 0 < R < 0,414 R1where R1is the radius of the details, and throwing produce once with the side surface of the charge.

 

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