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Date of Publication:2013-01-01

Journal:机械工程材料

Volume:37

Issue:6

Page Number:72-77

ISSN No.:1000-3738

Abstract:The Ni50ANi-based alloy powders were deposited on the surface of
   lCrl8Ni9Ti stainless steel by plasma arc surfacing technology, and the
   microstructure, microhardness and friction and wear properties of the
   surfacing layer at different welding currents were studied. The results
   show that the surfacing layer mainly consisted of r-Ni and precipitates
   such as CrB, M_(23) (C,B)_6, Cr_7C_3, Cr_5B_3, Ni_3Si and Ni_3B. The
   morphology of surfacing layer varied with the increase of welding
   current When the welding current was 160 A, the microstructure was
   floret-like and granule-like and the surfacing layer had the highest
   microhardness of 680 HV, and its wear resistance was the best. The wear
   quantity of the surfacing layer increased with the increase of wear
   time, and the wear quantity was the largest when the current was 190 A.
   Wear mechanism of the surfacing layer was mainly adhesive and
   accompanied by mild abrasive and oxidative wear appearing in later
   stage.

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