METHOD FOR PASSENGER RESERVED SEAT CAR LIFE INCREASE

Abstract

In the paper there is considered a car basic bearing element – center sill which because of long operation is subjected to corrosion destruction (on surface and in depth). The elimination of such corrosion spots mechanically is not effective and results in local decrease of a unit thickness and also in some cases in through corrosion. The authors of the paper have carried out investigations in places where intensive corrosion took place. For this there were cut out four fragments of the center sill and carried out etching-out and measuring residual stresses and a deformation value from etching depth of each fragment through Davidenkov’s method and CNIITMach’s procedure. As a result of the investigation carried out there is offered a fulfillment of center sill strengthening in the area of intermediate and end girder welding by means of shot cleaning in these areas, and also by additional corrosion resistant coating application on these surfaces. The investigations are carried out through Davidenkov’s method and on the basis of CNIITMach’s procedure. The work novelty: there are defined conditions for corrosion spot formation and technology is developed to ensure units life increase. According to the results of the investigations carried out there is made a conclusion: for the purpose of decrease and exclusion of corrosion processes and service life increase of both the center sill and a car in the whole it is necessary to carry out strengthening center sill elements in the areas of intermediate and end girders welding by means of the shot cleaning fulfillment in these places, and also an additional corrosion resistant coating application on these areas.