A wear resistant ductile metal-toughened Cr13Ni5Si2 ternary metal silicide alloy

被引：14

作者：

Fang, YL ^{[1
]}

Tang, HB ^{[1
]}

Wang, HM ^{[1
]}

机构：

[1] Beihang Univ, Sch Mat Sci & Engn, Lab Laser Mat Proc & Mfg, Beijing 100083, Peoples R China

来源：

INTERMETALLICS | 2006年 / 14卷 / 07期

基金：

中国国家自然科学基金;

关键词：

silicides; various; tribological properties; laser processing; melting; wear-resistant applications;

D O I：

10.1016/j.intermet.2005.11.012

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A ductile metal-toughened Cr-Ni-Si ternary metal silicide wear resistant alloy with a dual-phase microstructure consisting of Cr13Ni5Si2 ternary metal silicide primary dendrites and the interdendritic nickel-base solid Solution (gamma) was designed and fabricated by the laser melting/continuous deposition process. Wear resistance of the gamma-toughened Cr13Ni5Si2 intermetallic alloy was evaluated on an MM-200 block-on-wheel dry sliding wear tester at room temperature The gamma-toughened Cr13Ni5Si2 intermetallic alloy has excellent wear resistance and extremely low load-sensitivity of wear under dry sliding wear test conditions due to the inherent high hardness, abnormal hardness-temperature relation and strong covalent-dominant atomic bonds. The isolated toughening gamma phase played a positive role in reducing volume wear rate by retarding crack propagation and preventing pull-out of the broken Cr13Ni5Si2 fragments from the wear surface. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：750 / 758

页数：9

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