Sand-water slurry erosion of API 5L X65 pipe steel as quenched from intercritical temperature

The objective of this: study was to analyse the erosion of API 5L X65 pipe steel whose microstructure consisted of ferrite and martensite obtained by quenching from intercritical temperature (770 degreesC). Jet impingement tests with sand-water slurry were used. The changes in mechanical properties, caused by heat treatment carried out, did not induce changes in either the mechanism or erosion resistance. The erosion rate increased with angle of attack until 30 degrees and later decreased until 90 degrees. The microtexture of the eroded surfaces, at angles of attack; of 30 degrees and 90 degrees, were similar for both conditions and were composed of craters and platelets at several stages of evolution. The erosion mechanism was by extrusion with the forming and forging of platelets. (C) 2000 Elsevier Science Ltd. All rights reserved.