Characteristics of Thermally Sprayed NiCrBSi Coatings before and after Electromagnetic Induction Remelting Process

被引：5

作者：

Valean, Petru Cristian ^{[1
,2
]}

Kazamer, Norbert ^{[1
,2
]}

Pascal, Dragos-Toader ^{[2
]}

Muntean, Roxana ^{[2
]}

Baranyi, Istvan ^{[3
]}

Marginean, Gabriela ^{[2
]}

Serban, Viorel-Aurel ^{[1
]}

机构：

[1] Politehn Univ Timisoara, Dept Mat Sci & Mfg Engn, Piata Victoriei 2, Timisoara 300006, Romania

[2] Westphalian Univ Appl Sci, Dept Mat Sci & Testing, Neidenburgerstr 43, D-45897 Gelsenkirchen, Germany

[3] Obuda Univ, Banki Donat Fac Mech & Safety Engn, Nepszinhaz U 8, H-1081 Budapest, Hungary

来源：

ACTA POLYTECHNICA HUNGARICA | 2019年 / 16卷 / 03期

关键词：

NiCrBSi; self-fluxing alloy; flame spraying; inductive remelting process; pin-on-disk; microhardness; corrosion behavior;

D O I：

10.12700/APH.16.3.2019.3.1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Active mechanical components that work in highly aggressive environments require protection against premature deterioration and, at the same time, it is necessary to ensure a long lifespan. In order to achieve these important features, a protective coating can be added. In this work, a NiCrBSi self-fluxing alloy powder was employed, as feedstock material. The coating was deposited by means of oxyacetylene flame spraying process, achieving a thickness of approximately 1000 mu m and exhibiting a high degree of porosity and a weak mechanical adhesion to the substrate. To improve these characteristics, a remelting process using high frequency currents was applied. After the remelting process, the porosity decreased, from an initial value of approximately 15%, to a final value under 3%. Although the microhardness values did not change significantly, both wear-rate and corrosion behavior improvement, after the electromagnetic remelting, was observed.

引用

页码：7 / 18

页数：12