Study of Surface Hardening to Injectors of Gasoline

Abstract

This paper studies the formation of boride layers on substrate injector combustion AISI 304 per nozzle surface treatment in addition the formation of hard layers and FeB type Fe2B were obtained in a temperature range of 1223 and 1273 K with exposure times of 1/2, 1, 3 and 5 h. The study consisted boride type layer formed on the surface and the characterization of the boride layer were evaluated by the method by analysis of X-ray diffraction (XRD), the distribution of the alloying elements were detected by spectrometry energy Dispersive (EDS) inside the surface, the evaluation of adhesion of the layers was determined by the technique Rockwell-C hardness was also evaluated and the Young's modulus of the layer by the nanoindentation technique with the load of 200 mN. Finally this study hardening fuel injector; is desired increase its useful life.

Mechanical Behavior of Iron Boride Formed in the Surface of an AISI W2

“…The surface modification of high speed steels used as tools in the manufacturing area is to improve their performance in the machining process, tool life (defined as the period of time in which the cutting tool loses its usefulness through wear) and to modify the failure mechanisms (chipped, partial fracture, plastic deformation, fracture, thermal, etc.) [5][6] .The morphology of the layers depends mainly on the chemical composition of the substrate. Sawn layers are obtained in low alloy steels, while in high alloy steels of these layers tend to be flat [7-8-9].…”

Analysis of the wear mechanisms of the boriding drill tip

“…The drill bit was subjected to thermochemical boriding treatment to modify its surface and obtain high protection against wear and corrosion [2] [3]. The boriding conditions were: temperature of 900°C, 6 hours of exposure, conventional furnace without controlled atmosphere and reused rehydrated paste [4] [5].…”