Title£º Microstructures and erosion-corrosion behavior of Fe-B alloy containing chromium and nickel
Author£º Da-wei Yi1, Yu-pu Shi1, Han-guang Fu2, Jin Chen1, Chong Li1
Address£º 1. College of Materials Science and Engineering, Xi'an University of Science and Technology, Xi¡¯an 710054, China; 2. College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
Key words£º microstructure; borocarbide; chromium; nickel; erosion-corrosion
CLC Nmuber£º TG143.9
Document Code£º A
Article ID£º 1672-6421(2019)05-307-06
Abstract£º

The Fe-B alloy containing chromium and nickel was prepared, and the microstructure and erosion-corrosion behavior of the alloy were investigated by means of scanning electron microscopy, energy dispersive X-ray spectrometry, X-ray diffraction analysis, Leica digital image analysis, a hardness tester and an erosion-corrosion tester. Cr28 white cast iron was used for comparison. Results show that the microstructures of both as-cast and heat-treated Fe-B alloys consist of austenite and borocarbide. The nickel and chromium elements are mainly distributed over the matrix and borocarbide, respectively. The hardness of the austenite matrix and the Rockwell hardness of heat-treated Fe-B alloy are higher than those of as-cast Fe-B alloy. In the erosion-corrosion test of the slurry, the erosion-corrosion weight loss of Fe-B alloy is lower than that of Cr28 white cast iron, indicating the Fe-B alloy displays higher erosion-corrosion resistance.